Publications
1.
Festag, A.; Udupa, S.; Garcia, L.; Wellens, R.; Hecht, M.; Ulfig, P.
End-to-End Performance Measurements of Drone Communications in 5G Cellular Networks Proceedings Article
In: IEEE Vehicular Technology Conference (VTC-Fall), pp. 6, Virtual, 2021.
Abstract | Links | BibTeX | Tags: drones, measurements, mobile communication, wireless communication
@inproceedings{Festag:VTC-Fall:2021,
title = {End-to-End Performance Measurements of Drone Communications in 5G Cellular Networks},
author = {A. Festag and S. Udupa and L. Garcia and R. Wellens and M. Hecht and P. Ulfig},
url = {https://ieeexplore.ieee.org/document/9625429},
doi = {10.1109/VTC2021-Fall52928.2021.9625429},
year = {2021},
date = {2021-09-27},
urldate = {2021-12-10},
booktitle = {IEEE Vehicular Technology Conference (VTC-Fall)},
pages = {6},
address = {Virtual},
abstract = {Cellular communications with its ubiquitous cellular coverage enable various use cases for long-distance aerial inspection, surveillance and monitoring with drones. For these use cases, the exchange of command & control and sensor data, such as video, require a reliable and low-latency communication link. In this paper, we present results of a measurement campaign of drone communications in an experimental 5G network. The measurement scenarios cover (i) the capacity and quality of the link between the drone and the ground station, (ii) the robustness of drone communications with the isolation provided by network slicing, and (iii) the stability of the link between drone and ground station for long-distance flights. The results indicate that cellular communications in principle meet the reliability and latency of video and command & control data for long-distance flights even when the performance of cellular network is optimized for terrestrial devices. The application of network slicing in future 5G networks has a great potential to protect the drone critical command & control data from undesired wireless interferers.},
keywords = {drones, measurements, mobile communication, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Cellular communications with its ubiquitous cellular coverage enable various use cases for long-distance aerial inspection, surveillance and monitoring with drones. For these use cases, the exchange of command & control and sensor data, such as video, require a reliable and low-latency communication link. In this paper, we present results of a measurement campaign of drone communications in an experimental 5G network. The measurement scenarios cover (i) the capacity and quality of the link between the drone and the ground station, (ii) the robustness of drone communications with the isolation provided by network slicing, and (iii) the stability of the link between drone and ground station for long-distance flights. The results indicate that cellular communications in principle meet the reliability and latency of video and command & control data for long-distance flights even when the performance of cellular network is optimized for terrestrial devices. The application of network slicing in future 5G networks has a great potential to protect the drone critical command & control data from undesired wireless interferers.
2.
González, A.; Kühlmorgen, S.; Festag, A.; Fettweis, G.
Resource Allocation for Block-Based Multi-Carrier Systems Considering QoS Requirements Proceedings Article
In: IEEE Global Communications Conference (Globecom), Singapore, 2017.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Gonzalez:GLOBECOM:2017,
title = {Resource Allocation for Block-Based Multi-Carrier Systems Considering QoS Requirements},
author = {A. González and S. Kühlmorgen and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/8254649},
doi = {10.1109/GLOCOM.2017.8254649},
year = {2017},
date = {2017-12-04},
urldate = {2018-01-15},
booktitle = {IEEE Global Communications Conference (Globecom)},
address = {Singapore},
abstract = {Future 5G and beyond mobile networks target at services with a high degree of heterogeneity in terms of their communication requirements. To meet these requirements, different PHY numerologies would provide a better performance; still, all services must be served by a single network technology. Generalized Frequency Division Multiplexing (GFDM) is a good candidate for PHY virtualization where the dimensions of the data block can be dynamically configured in time and frequency. Allocating these blocks in a common spectrum every scheduling period leads to a "packing" problem, in which the QoS demands of the data flows need to be acknowledged. In this paper we consider the optimization of the data block allocation as a Knapsack problem. We incorporate the flows' QoS demands by means of utility theory, where utility functions provide a metric of urgency for a flow to be scheduled and the data block to be allocated. For the resulting two-dimensional geometric Knapsack problem we propose a heuristic solution, assess different design options and evaluate the performance in terms of data rate and queuing delay.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Future 5G and beyond mobile networks target at services with a high degree of heterogeneity in terms of their communication requirements. To meet these requirements, different PHY numerologies would provide a better performance; still, all services must be served by a single network technology. Generalized Frequency Division Multiplexing (GFDM) is a good candidate for PHY virtualization where the dimensions of the data block can be dynamically configured in time and frequency. Allocating these blocks in a common spectrum every scheduling period leads to a "packing" problem, in which the QoS demands of the data flows need to be acknowledged. In this paper we consider the optimization of the data block allocation as a Knapsack problem. We incorporate the flows' QoS demands by means of utility theory, where utility functions provide a metric of urgency for a flow to be scheduled and the data block to be allocated. For the resulting two-dimensional geometric Knapsack problem we propose a heuristic solution, assess different design options and evaluate the performance in terms of data rate and queuing delay.
3.
Zhang, D.; Festag, A.; Fettweis, G.
Performance of Generalized Frequency Division Multiplexing Based Physical Layer in Vehicular Communication Journal Article
In: IEEE Transactions on Vehicular Technology, vol. 66, no. 11, pp. 9809-9824, 2017.
Abstract | Links | BibTeX | Tags: Cooperative ITS, Intelligent Transport Systems, V2X communication, wireless communication
@article{Zhang:TVT:2017,
title = {Performance of Generalized Frequency Division Multiplexing Based Physical Layer in Vehicular Communication},
author = {D. Zhang and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7968507},
doi = {10.1109/TVT.2017.2723729},
year = {2017},
date = {2017-07-05},
urldate = {2017-07-05},
journal = {IEEE Transactions on Vehicular Technology},
volume = {66},
number = {11},
pages = {9809-9824},
abstract = {Vehicular communications enable information exchange among vehicles including the roadside infrastructure. This has led to applications to primarily increase road safety and traffic efficiency. Standardization efforts on vehicular communications are underway. The physical layer (PHY) is defined based on the IEEE 802.11 family of WiFi standards operating at the 5.9 GHz frequency band and on extensions of long-term evolution (LTE); in both cases orthogonal frequency division multiplexing (OFDM) is the waveform of choice. Since the typical environment of WiFi deployment is very different to the vehicular communication environment, it is a challenging task to adapt the WiFi-based PHY for providing reliable and real-time communications under highly time- and frequency-selective fading channels. In this paper, the employment of an alternative waveform termed generalized frequency division multiplexing (GFDM) for vehicular communication is investigated. Specifically, a GFDM-based packet design is proposed on the basis of the standard-compliant OFDM-based PHY configuration. On the receiver side, this paper focuses on developing synchronization, channel estimation, and equalization algorithms. The performance of the resulting GFDM-based PHY is verified and compared with the OFDM-based one by means of simulation. The obtained results demonstrate that the proposed GFDM-based PHY can utilize the time and frequency resources more efficiently, and outperform particularly under challenging channel conditions. Additionally, the low out-of-band emission of GFDM is a desirable feature for future multichannel operation (MCO) in vehicular communications.},
keywords = {Cooperative ITS, Intelligent Transport Systems, V2X communication, wireless communication},
pubstate = {published},
tppubtype = {article}
}
Vehicular communications enable information exchange among vehicles including the roadside infrastructure. This has led to applications to primarily increase road safety and traffic efficiency. Standardization efforts on vehicular communications are underway. The physical layer (PHY) is defined based on the IEEE 802.11 family of WiFi standards operating at the 5.9 GHz frequency band and on extensions of long-term evolution (LTE); in both cases orthogonal frequency division multiplexing (OFDM) is the waveform of choice. Since the typical environment of WiFi deployment is very different to the vehicular communication environment, it is a challenging task to adapt the WiFi-based PHY for providing reliable and real-time communications under highly time- and frequency-selective fading channels. In this paper, the employment of an alternative waveform termed generalized frequency division multiplexing (GFDM) for vehicular communication is investigated. Specifically, a GFDM-based packet design is proposed on the basis of the standard-compliant OFDM-based PHY configuration. On the receiver side, this paper focuses on developing synchronization, channel estimation, and equalization algorithms. The performance of the resulting GFDM-based PHY is verified and compared with the OFDM-based one by means of simulation. The obtained results demonstrate that the proposed GFDM-based PHY can utilize the time and frequency resources more efficiently, and outperform particularly under challenging channel conditions. Additionally, the low out-of-band emission of GFDM is a desirable feature for future multichannel operation (MCO) in vehicular communications.
4.
Zhang, X.; Festag, A.; Fettweis, G.
Linear Precoder Design with Imperfect CSI in Underlay Device-to-Device Communication for a Vehicular Platooning Scenario Proceedings Article
In: IEEE Vehicular Technology Conference (VTC-Spring), Sydney, NSW, Australia, 2017.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Zhang:VTCSpring:2017,
title = {Linear Precoder Design with Imperfect CSI in Underlay Device-to-Device Communication for a Vehicular Platooning Scenario},
author = {X. Zhang and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/8108249},
doi = {10.1109/VTCSpring.2017.8108249},
year = {2017},
date = {2017-06-04},
urldate = {2017-11-16},
booktitle = {IEEE Vehicular Technology Conference (VTC-Spring)},
address = {Sydney, NSW, Australia},
abstract = {This paper proposes a novel design for linear precoder in underlay Device-to-Device (D2D) communication using cellular network, specifically for a use case with vehicle-to-vehicle communication and platooning. To increase the communication reliability, we develop an optimization algorithm for precoder that takes into account the outage probability when channel state information (CSI) is only partially available at devices and transmission could be in outage. The algorithm aims at maximizing the sum throughput over each transmission link received at one device, while constraining the interference caused by the transmit power from each device to the cellular network. Due to the intractable form of outage probability, an extended Markov Inequality is used to transform the problem into an upper-bound expression. A two-step alternating algorithm is then adapted to solve the multi- variable optimization. The proposed algorithm is compared with other state-of-the-art technologies in the field of vehicular communication for achieving high throughput. Simulation results show that our proposed algorithm outperforms the current techniques and achieves higher average throughput with extremely low outage probability, thus enables reliable vehicle-to-vehicle communication for platooning in a D2D underlay setting.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper proposes a novel design for linear precoder in underlay Device-to-Device (D2D) communication using cellular network, specifically for a use case with vehicle-to-vehicle communication and platooning. To increase the communication reliability, we develop an optimization algorithm for precoder that takes into account the outage probability when channel state information (CSI) is only partially available at devices and transmission could be in outage. The algorithm aims at maximizing the sum throughput over each transmission link received at one device, while constraining the interference caused by the transmit power from each device to the cellular network. Due to the intractable form of outage probability, an extended Markov Inequality is used to transform the problem into an upper-bound expression. A two-step alternating algorithm is then adapted to solve the multi- variable optimization. The proposed algorithm is compared with other state-of-the-art technologies in the field of vehicular communication for achieving high throughput. Simulation results show that our proposed algorithm outperforms the current techniques and achieves higher average throughput with extremely low outage probability, thus enables reliable vehicle-to-vehicle communication for platooning in a D2D underlay setting.
5.
Tervo, V.; He, X.; Zhou, X.; Komulainen, P.; Kühlmorgen, S.; Wolf, A.; Festag, A.
An Error Rate Model of Relay Communications with Lossy Forwarding and Joint Decoding Proceedings Article
In: IEEE International Conference on Communications Workshops (ICC), Kuala Lumpur, Malaysia, 2016.
Abstract | Links | BibTeX | Tags: wireless communication
@inproceedings{Tervo:ICC:2016,
title = {An Error Rate Model of Relay Communications with Lossy Forwarding and Joint Decoding},
author = {V. Tervo and X. He and X. Zhou and P. Komulainen and S. Kühlmorgen and A. Wolf and A. Festag},
url = {https://ieeexplore.ieee.org/abstract/document/7503841},
doi = {10.1109/ICCW.2016.7503841},
year = {2016},
date = {2016-05-23},
urldate = {2016-07-07},
booktitle = {IEEE International Conference on Communications Workshops (ICC)},
address = {Kuala Lumpur, Malaysia},
abstract = {This paper presents a link quality model for a wireless communication system with distributed turbo coding and lossy forwarding. The model maps the signal-to-interference-plus-noise ratio (SINR) of packet copies received from different links to a mutual information parameter and, in a second stage, converts it to a block error rate. We present the design and foundation of the model and validate its accuracy for different modulation and coding schemes over additive white Gaussian noise (AWGN) channels. The model accurately predicts the link-level performance at a low computational complexity and can be therefore used as an physical layer (PHY) abstraction for the computationally-intensive, simulation-based performance evaluation of various functionalities at higher protocol layers or at the system level. In order to illustrate the usage of the proposed model, we show the integration of the model into a protocol level simulator assessing the performance improvements of lossy forwarding and joint decoding.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper presents a link quality model for a wireless communication system with distributed turbo coding and lossy forwarding. The model maps the signal-to-interference-plus-noise ratio (SINR) of packet copies received from different links to a mutual information parameter and, in a second stage, converts it to a block error rate. We present the design and foundation of the model and validate its accuracy for different modulation and coding schemes over additive white Gaussian noise (AWGN) channels. The model accurately predicts the link-level performance at a low computational complexity and can be therefore used as an physical layer (PHY) abstraction for the computationally-intensive, simulation-based performance evaluation of various functionalities at higher protocol layers or at the system level. In order to illustrate the usage of the proposed model, we show the integration of the model into a protocol level simulator assessing the performance improvements of lossy forwarding and joint decoding.
6.
Kühlmorgen, S.; Festag, A.; Fettweis, G.
Exploiting Distributed Source Coding for Multi-hop Routing in Wireless Ad Hoc Network Proceedings Article
In: IEEE Vehicular Technology Conference (VTC-Spring), Nanjing, China, 2016.
Abstract | Links | BibTeX | Tags: wireless communication
@inproceedings{Kuehlmorgen:VTCSpring:2016,
title = {Exploiting Distributed Source Coding for Multi-hop Routing in Wireless Ad Hoc Network},
author = {S. Kühlmorgen and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7504244},
doi = {10.1109/VTCSpring.2016.7504244},
year = {2016},
date = {2016-05-15},
urldate = {2016-07-07},
booktitle = {IEEE Vehicular Technology Conference (VTC-Spring)},
address = {Nanjing, China},
abstract = {This paper presents a routing algorithm for wireless multi-hop ad hoc networks, which applies distributed source coding (DSC) and multi-path transport of data packets. DSC enables the relay nodes to efficiently encode the packets and helps the destination node to correctly decode the information from multiple erroneous copies of the same packet received via different paths. While in conventional communication systems packets with bit errors are discarded, in our design the relays are allowed to forward erroneous packets. In order to exploit DSC for ad hoc routing, we extend contention-based geographical forwarding (CBGF) to support multi-path packet transport and enable the joint decoder to recover transmission errors. Under harsh wireless conditions, the approach promises performance gains compared to the case without joint decoding. In order to evaluate the performance of CBGF, we define an evaluation framework that models the erroneous forwarding and joint decoding by an abstraction of the physical transmission. We assess the performance by simulations for a simple scenario with static nodes in terms of packet success ratio, end-to-end delay, and data traffic overhead, and compare the results with the baseline CBGF scheme without DSC-specific extensions and joint decoding.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper presents a routing algorithm for wireless multi-hop ad hoc networks, which applies distributed source coding (DSC) and multi-path transport of data packets. DSC enables the relay nodes to efficiently encode the packets and helps the destination node to correctly decode the information from multiple erroneous copies of the same packet received via different paths. While in conventional communication systems packets with bit errors are discarded, in our design the relays are allowed to forward erroneous packets. In order to exploit DSC for ad hoc routing, we extend contention-based geographical forwarding (CBGF) to support multi-path packet transport and enable the joint decoder to recover transmission errors. Under harsh wireless conditions, the approach promises performance gains compared to the case without joint decoding. In order to evaluate the performance of CBGF, we define an evaluation framework that models the erroneous forwarding and joint decoding by an abstraction of the physical transmission. We assess the performance by simulations for a simple scenario with static nodes in terms of packet success ratio, end-to-end delay, and data traffic overhead, and compare the results with the baseline CBGF scheme without DSC-specific extensions and joint decoding.
7.
Zhang, X.; Fritzsche, R.; Festag, A.; Fettweis, G.
Linear Multi-Cell Precoding for Throughput Optimization Considering Outage Book Section
In: Utschick, W. (Ed.): Communications in Interference Limited Networks. Signals and Communication Technology, pp. 501-519, Springer, Cham, 2016.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@incollection{Zhang:DFG:2016,
title = {Linear Multi-Cell Precoding for Throughput Optimization Considering Outage},
author = {X. Zhang and R. Fritzsche and A. Festag and G. Fettweis},
editor = {W. Utschick},
url = {https://link.springer.com/chapter/10.1007/978-3-319-22440-4_21},
doi = {10.1007/978-3-319-22440-4_21},
year = {2016},
date = {2016-01-31},
urldate = {2016-01-31},
booktitle = {Communications in Interference Limited Networks. Signals and Communication Technology},
pages = {501-519},
publisher = {Springer},
address = {Cham},
abstract = {Linear precoding provides the potential to boost the data throughput in a cellular multiple-input-multiple-output downlink system. It exploits spatial diversity and enables multiple users to be served on the same time-frequency resources. In a previous study we presented the maximization of the weighted sum data rate in multi-cell networks considering a transmit power constraint per base station with imperfect channel state information (CSI) at the transmitter. Beside imperfections in the precoding matrix design, impaired CSI can also cause outage if the actual channel does not support the data rate assigned for transmission. As the new 5th generation wireless communication era is dawning, future cellular networks are expected to be more resilient. In this chapter, we investigate the aspect of potential outages with respect to the joint optimization of the precoding matrix and the transmission rate. In this context, we target at the maximization of throughput considering both imperfect CSI at the transmitter and potential outages. We quantify the performance by means of Monte Carlo simulations.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {incollection}
}
Linear precoding provides the potential to boost the data throughput in a cellular multiple-input-multiple-output downlink system. It exploits spatial diversity and enables multiple users to be served on the same time-frequency resources. In a previous study we presented the maximization of the weighted sum data rate in multi-cell networks considering a transmit power constraint per base station with imperfect channel state information (CSI) at the transmitter. Beside imperfections in the precoding matrix design, impaired CSI can also cause outage if the actual channel does not support the data rate assigned for transmission. As the new 5th generation wireless communication era is dawning, future cellular networks are expected to be more resilient. In this chapter, we investigate the aspect of potential outages with respect to the joint optimization of the precoding matrix and the transmission rate. In this context, we target at the maximization of throughput considering both imperfect CSI at the transmitter and potential outages. We quantify the performance by means of Monte Carlo simulations.
8.
Belen-Martinez, A.; Grieger, M.; Festag, A.; Fettweis, G.
Sectorization and Intra-Site CoMP: Comparison of Field-Trials and System-Level Simulations Proceedings Article
In: IEEE Global Communications Conference (GLOBECOM), San Diego, CA, USA, 2015.
Abstract | Links | BibTeX | Tags: measurements, wireless communication
@inproceedings{Belen:GLOBECOM:2015,
title = {Sectorization and Intra-Site CoMP: Comparison of Field-Trials and System-Level Simulations},
author = {A. Belen-Martinez and M. Grieger and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7417650},
doi = {10.1109/GLOCOM.2015.7417650},
year = {2015},
date = {2015-12-06},
urldate = {2015-12-06},
booktitle = {IEEE Global Communications Conference (GLOBECOM)},
address = {San Diego, CA, USA},
abstract = {Coordinated multi-point (CoMP) is a well-known approach to mitigate interference in cellular systems and, thus, to improve spectral efficiency. On the downside, implementing CoMP comes at a high cost, e.g., regarding backhaul and signal processing. These costs can be reduced when only BSs at the same site cooperate, referred to as intra-site CoMP. However, the capacity gains of intra-site CoMP are also lower, because intra-site clusters cover only a subset of cell edges. In conventional cellular networks, the deployment of 3 non-overlapping sectors is known to be a good compromise between spatial multiplexing and interference. Using intra-site CoMP, earlier simulation-based work has shown that a higher number of sectors that are largely overlapping are beneficial. In this work, we evaluate multi-cell propagation in an urban testbed, where one site is deployed either with 3 non-overlapping or with 6 overlapping sectors. Moreover, we compare measurements from field trials with simulation results for reference.},
keywords = {measurements, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Coordinated multi-point (CoMP) is a well-known approach to mitigate interference in cellular systems and, thus, to improve spectral efficiency. On the downside, implementing CoMP comes at a high cost, e.g., regarding backhaul and signal processing. These costs can be reduced when only BSs at the same site cooperate, referred to as intra-site CoMP. However, the capacity gains of intra-site CoMP are also lower, because intra-site clusters cover only a subset of cell edges. In conventional cellular networks, the deployment of 3 non-overlapping sectors is known to be a good compromise between spatial multiplexing and interference. Using intra-site CoMP, earlier simulation-based work has shown that a higher number of sectors that are largely overlapping are beneficial. In this work, we evaluate multi-cell propagation in an urban testbed, where one site is deployed either with 3 non-overlapping or with 6 overlapping sectors. Moreover, we compare measurements from field trials with simulation results for reference.
9.
Kaltenberger, F.; Knopp, R.; Vitiello, C.; Danneberg, M.; Festag, A.
Experimental Analysis of 5G Candidate Waveforms and their Coexistence with 4G Systems Proceedings Article
In: Joint NEWCOM/COST Workshop on Wireless Communications (JNCW), Barcelona, Spain, 2015.
Abstract | Links | BibTeX | Tags: measurements, wireless communication
@inproceedings{Kaltenberger:JNCW:2015,
title = {Experimental Analysis of 5G Candidate Waveforms and their Coexistence with 4G Systems},
author = {F. Kaltenberger and R. Knopp and C. Vitiello and M. Danneberg and A. Festag},
url = {https://www.eurecom.fr/publication/4725/download/cm-publi-4725.pdf},
year = {2015},
date = {2015-10-15},
urldate = {2015-10-15},
booktitle = {Joint NEWCOM/COST Workshop on Wireless Communications (JNCW)},
address = {Barcelona, Spain},
abstract = {The 5G mobile standard will very likely include a new waveform that addresses scenarios like sporadic low- latency traffic and dynamic spectrum access (DSA). In both cases the current 4G waveforms have some deficiencies, like the need for strict synchronicity and the high adjacent channel leakage ratio (ACLR) respectively. Several candidate waveforms can be found in the literature, such Generalized Frequency Division Multiplexing (GFDM), and Universal Filtered Multi- Carrier (UFMC). Both use a digital multi-carrier transceiver concept that employs pulse shaping filters to provide control over the transmitted signal's spectral properties. In this paper we will present experimental results that evaluate the impact of these two waveforms on an existing 4G system. The 4G system was based on Eurecom's OpenAirInterface for the eNB and a commercial UE. The new waveform was generated using a signal generator.},
keywords = {measurements, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
The 5G mobile standard will very likely include a new waveform that addresses scenarios like sporadic low- latency traffic and dynamic spectrum access (DSA). In both cases the current 4G waveforms have some deficiencies, like the need for strict synchronicity and the high adjacent channel leakage ratio (ACLR) respectively. Several candidate waveforms can be found in the literature, such Generalized Frequency Division Multiplexing (GFDM), and Universal Filtered Multi- Carrier (UFMC). Both use a digital multi-carrier transceiver concept that employs pulse shaping filters to provide control over the transmitted signal's spectral properties. In this paper we will present experimental results that evaluate the impact of these two waveforms on an existing 4G system. The 4G system was based on Eurecom's OpenAirInterface for the eNB and a commercial UE. The new waveform was generated using a signal generator.
10.
Wolf, A.; Matthé, M.; Festag, A.; Fettweis, G.
Outage Based Power Allocation for a Lossy Forwarding Two-Relaying System Proceedings Article
In: IEEE International Workshop on Computer Aided Modelling and Design of Communication Links and Networks (CAMAD), Guildford, UK, 2015.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Wolf:CAMAD:2015,
title = {Outage Based Power Allocation for a Lossy Forwarding Two-Relaying System},
author = {A. Wolf and M. Matthé and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7390522},
doi = {10.1109/CAMAD.2015.7390522},
year = {2015},
date = {2015-09-07},
urldate = {2016-01-28},
booktitle = {IEEE International Workshop on Computer Aided Modelling and Design of Communication Links and Networks (CAMAD)},
address = {Guildford, UK},
abstract = {The extension of Decode-and-Forward (DF) relaying by lossy forwarding has the potential to ensure a reliable multi-hop message transport in wireless mesh networks. Unlike in conventional DF relaying, with lossy forwarding a relay forwards a message regardless whether errors have been detected after decoding. At the destination, a proper joint decoding technique exploits the high correlation of messages received via different network paths. According to the Slepian-Wolf correlated source coding theorem a performance improvement compared with the conventional DF relaying can be expected. The performance can be optimized by a power allocation scheme that distributes the total transmit power budget between source and relay nodes. This paper analyzes the outage probability (OP) based on the Slepian-Wolf source correlation theorem for a system with two relays and designs a power allocation scheme to minimize the OP. The proposed scheme reduces the OP by up to 1.5 orders of magnitude compared to the reference case of equal power allocation. We also compare the performance gain of a system with two relays against the case with a single relay for the same total transmit power budget. Results show a reduction of the OP of at least one and up to two orders of magnitude.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
The extension of Decode-and-Forward (DF) relaying by lossy forwarding has the potential to ensure a reliable multi-hop message transport in wireless mesh networks. Unlike in conventional DF relaying, with lossy forwarding a relay forwards a message regardless whether errors have been detected after decoding. At the destination, a proper joint decoding technique exploits the high correlation of messages received via different network paths. According to the Slepian-Wolf correlated source coding theorem a performance improvement compared with the conventional DF relaying can be expected. The performance can be optimized by a power allocation scheme that distributes the total transmit power budget between source and relay nodes. This paper analyzes the outage probability (OP) based on the Slepian-Wolf source correlation theorem for a system with two relays and designs a power allocation scheme to minimize the OP. The proposed scheme reduces the OP by up to 1.5 orders of magnitude compared to the reference case of equal power allocation. We also compare the performance gain of a system with two relays against the case with a single relay for the same total transmit power budget. Results show a reduction of the OP of at least one and up to two orders of magnitude.
11.
Gaspar, I.; Festag, A.; Fettweis, G.
Synchronization using a Pseudo-Circular Preamble for Generalized Frequency Division Multiplexing in Vehicular Communication Proceedings Article
In: IEEE Vehicular Technology Conference (VTC-Fall), Boston, USA, 2015.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Gaspar:VTCFall:2015,
title = {Synchronization using a Pseudo-Circular Preamble for Generalized Frequency Division Multiplexing in Vehicular Communication},
author = {I. Gaspar and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7391164},
doi = {10.1109/VTCFall.2015.7391164},
year = {2015},
date = {2015-09-06},
urldate = {2016-01-28},
booktitle = {IEEE Vehicular Technology Conference (VTC-Fall)},
address = {Boston, USA},
abstract = {This paper explores using the first subsymbol in the structure of a GFDM symbol as a pseudo circular preamble. As data and training sequence overlap in the GFDM structure, an initial estimation approach for isolating the preamble information from the data is presented. The concept allows for adaptation of state-of-the-art techniques developed for OFDM in order to estimate time offset at every GFDM symbol. The paper studies the proposal in the context of vehicular communication scenarios and assesses the performance of single-shot estimation of time offset. Both, line-of-sight and non-line-of-sight scenarios with doubly-dispersive wireless channels are considered and compared with the CP-based method from the IEEE 802.11p standard.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper explores using the first subsymbol in the structure of a GFDM symbol as a pseudo circular preamble. As data and training sequence overlap in the GFDM structure, an initial estimation approach for isolating the preamble information from the data is presented. The concept allows for adaptation of state-of-the-art techniques developed for OFDM in order to estimate time offset at every GFDM symbol. The paper studies the proposal in the context of vehicular communication scenarios and assesses the performance of single-shot estimation of time offset. Both, line-of-sight and non-line-of-sight scenarios with doubly-dispersive wireless channels are considered and compared with the CP-based method from the IEEE 802.11p standard.
12.
Zhang, X.; Fritzsche, R.; Festag, A.; Lin, P. -H.; Fettweis, G.
Multi-Cell Linear Precoding Design for Throughput Optimization with Imperfect CSI and Outage Proceedings Article
In: IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Hong Kong, 2015.
Abstract | Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Zhang:PIMRC:2015,
title = {Multi-Cell Linear Precoding Design for Throughput Optimization with Imperfect CSI and Outage},
author = {X. Zhang and R. Fritzsche and A. Festag and P. -H. Lin and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/7343331},
doi = {10.1109/PIMRC.2015.7343331},
year = {2015},
date = {2015-08-30},
urldate = {2015-12-03},
booktitle = {IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)},
address = {Hong Kong},
abstract = {Cooperative multi-cell MIMO techniques are well known for their outstanding capability to mitigate inter-cell interference by allowing user data to be jointly processed by several interfering base stations for the improvement of the system performance. This paper proposes an iterative algorithm that designs the precoding matrix for cooperative multi-cell MIMO downlink communications. As the demand for higher throughput and higher system resilience is envisioned for future wireless communication systems, the proposed algorithm takes the potential outage into consideration when channel state information is only partially available at the transmitter side. The aim is to maximize the sum user throughput considering outage with subject to power limitation at each base station. The joint optimization of the precoding matrix and the assigned transmission rate is solved via a 2-step alternating algorithm. The performance of the proposed method is evaluated by Monte Carlo simulations and compared with existing methods. Simulation results show that our proposed algorithm achieves performance gain than other referenced methods over the entire compared SNR region. Performance of all methods are also compared and analyzed when inter-cluster interference is present.},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Cooperative multi-cell MIMO techniques are well known for their outstanding capability to mitigate inter-cell interference by allowing user data to be jointly processed by several interfering base stations for the improvement of the system performance. This paper proposes an iterative algorithm that designs the precoding matrix for cooperative multi-cell MIMO downlink communications. As the demand for higher throughput and higher system resilience is envisioned for future wireless communication systems, the proposed algorithm takes the potential outage into consideration when channel state information is only partially available at the transmitter side. The aim is to maximize the sum user throughput considering outage with subject to power limitation at each base station. The joint optimization of the precoding matrix and the assigned transmission rate is solved via a 2-step alternating algorithm. The performance of the proposed method is evaluated by Monte Carlo simulations and compared with existing methods. Simulation results show that our proposed algorithm achieves performance gain than other referenced methods over the entire compared SNR region. Performance of all methods are also compared and analyzed when inter-cluster interference is present.
13.
Kaltenberger, F.; Knopp, R.; Danneberg, M.; Festag, A.
Experimental Analysis and Simulative Validation of Dynamic Spectrum Access for Coexistence of 4G and Future 5G Systems Proceedings Article
In: European Conference on Networks and Communications (EUCNC, Paris, France, 2015.
Abstract | Links | BibTeX | Tags: measurements, wireless communication
@inproceedings{Kaltenberger:EUCNC:2015,
title = {Experimental Analysis and Simulative Validation of Dynamic Spectrum Access for Coexistence of 4G and Future 5G Systems},
author = {F. Kaltenberger and R. Knopp and M. Danneberg and A. Festag},
url = {https://ieeexplore.ieee.org/document/7194125},
doi = {10.1109/EuCNC.2015.7194125},
year = {2015},
date = {2015-06-29},
urldate = {2015-08-13},
booktitle = {European Conference on Networks and Communications (EUCNC},
address = {Paris, France},
abstract = {5G mobile networks will very likely include features that allow for a dynamic spectrum access (DSA) in order to exploit spectrum holes of a primary system. The efficient utilization of spectrum holes with minimum impairment of the primary system requires a waveform with a very low adjacent channel leakage ratio as well as robustness to time and frequency offsets. One of the approaches for new waveforms is Generalized Frequency Division Multiplexing (GFDM), a digital multi-carrier transceiver concept that employs pulse shaping filters to provide control over the transmitted signal's spectral properties. In this paper we present experimental results that evaluate the impact of the new GFDM waveform on an existing 4G system. The 4G system was based on Eurecom's OpenAirInterface for the eNB and a commercial UE. The 5G system was emulated using the LabVIEW/PXI platform with corresponding RF adapter modules from National Instruments and TUD's GFDM implementation. The experimental results show that GFDM can be used with about 5 dB higher transmit power than a corresponding orthogonal frequency division multiplexing (OFDM) system, before any impact on the primary system is noticeable. The results from our real-time measurements were validated by simulations.},
keywords = {measurements, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
5G mobile networks will very likely include features that allow for a dynamic spectrum access (DSA) in order to exploit spectrum holes of a primary system. The efficient utilization of spectrum holes with minimum impairment of the primary system requires a waveform with a very low adjacent channel leakage ratio as well as robustness to time and frequency offsets. One of the approaches for new waveforms is Generalized Frequency Division Multiplexing (GFDM), a digital multi-carrier transceiver concept that employs pulse shaping filters to provide control over the transmitted signal's spectral properties. In this paper we present experimental results that evaluate the impact of the new GFDM waveform on an existing 4G system. The 4G system was based on Eurecom's OpenAirInterface for the eNB and a commercial UE. The 5G system was emulated using the LabVIEW/PXI platform with corresponding RF adapter modules from National Instruments and TUD's GFDM implementation. The experimental results show that GFDM can be used with about 5 dB higher transmit power than a corresponding orthogonal frequency division multiplexing (OFDM) system, before any impact on the primary system is noticeable. The results from our real-time measurements were validated by simulations.
14.
Wild, T.; Wunder, G.; Schaich, F.; Chen, Y.; Kasparick, M.; Dryjanski, M.; Pietrzyk, S.; Michailow, N.; Matthé, M.; Gaspar, I.; Navarro, A.; Mendes, L.; Festag, A.; Fettweis, G.; Doré, J.; Cassiau, N.; Kténas, D.; Berg, V.; Eged, B.; Vago, P.
5GNOW: Intermediate frame structure and transceiver concepts Proceedings Article
In: IEEE Globecom Workshops (GC Wkshps), pp. 565-570, Austin, TX, USA, 2014.
Abstract | Links | BibTeX | Tags: wireless communication
@inproceedings{Wild:GLOBECOM:2014,
title = {5GNOW: Intermediate frame structure and transceiver concepts},
author = {T. Wild and G. Wunder and F. Schaich and Y. Chen and M. Kasparick and M. Dryjanski and S. Pietrzyk and N. Michailow and M. Matthé and I. Gaspar and A. Navarro and L. Mendes and A. Festag and G. Fettweis and J. Doré and N. Cassiau and D. Kténas and V. Berg and B. Eged and P. Vago},
url = {https://ieeexplore.ieee.org/document/7063492},
doi = {10.1109/GLOCOMW.2014.7063492},
year = {2014},
date = {2014-12-08},
urldate = {2015-03-19},
booktitle = {IEEE Globecom Workshops (GC Wkshps)},
pages = {565-570},
address = {Austin, TX, USA},
abstract = {This paper reports intermediate transceiver and frame structure concepts and corresponding results from the European FP7 research project 5GNOW. The core is the unified frame structure concept which supports an integrated 5G air interface, capable of dealing both with broadband data services and small packet services within the same band. It is essential for this concept to introduce waveforms which are more robust than OFDM, e.g., with respect to time-frequency misalignment. Encouraging candidate waveform technologies are presented and discussed with respective results. This goes along with the corresponding multiple access technologies using multi-layered signals and advanced multi-user receivers. In addition we introduce new (compressive) random access strategies to enable "one shot transmission" with greatly reduced control signaling particularly for sporadic traffic by orders of magnitude. Finally, we comment on the recent results on the 5GNOW networking interface. The intermediate results of 5GNOW lay the ground for the standardization path towards a new 5G air interface beyond LTE-A.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper reports intermediate transceiver and frame structure concepts and corresponding results from the European FP7 research project 5GNOW. The core is the unified frame structure concept which supports an integrated 5G air interface, capable of dealing both with broadband data services and small packet services within the same band. It is essential for this concept to introduce waveforms which are more robust than OFDM, e.g., with respect to time-frequency misalignment. Encouraging candidate waveform technologies are presented and discussed with respective results. This goes along with the corresponding multiple access technologies using multi-layered signals and advanced multi-user receivers. In addition we introduce new (compressive) random access strategies to enable "one shot transmission" with greatly reduced control signaling particularly for sporadic traffic by orders of magnitude. Finally, we comment on the recent results on the 5GNOW networking interface. The intermediate results of 5GNOW lay the ground for the standardization path towards a new 5G air interface beyond LTE-A.
15.
Michailow, N.; Mendes, L.; Matthé, M.; Gaspar, I.; Festag, A.; Fettweis, G.
Robust WHT-GFDM for the Next Generation of Wireless Networks Journal Article
In: IEEE Communications Letters, vol. 19, no. 1, pp. 106-109, 2014.
Abstract | Links | BibTeX | Tags: wireless communication
@article{Michailow:CommLetters:2014,
title = {Robust WHT-GFDM for the Next Generation of Wireless Networks},
author = {N. Michailow and L. Mendes and M. Matthé and I. Gaspar and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/6965609},
doi = {10.1109/LCOMM.2014.2374181},
year = {2014},
date = {2014-11-24},
urldate = {2014-11-24},
journal = {IEEE Communications Letters},
volume = {19},
number = {1},
pages = {106-109},
abstract = {This paper presents the combination of generalized frequency division multiplexing (GFDM) with the Walsh-Hadamard transform (WHT) to achieve a scheme that is robust against frequency-selective channels (FSC). The proposed scheme is suitable for low-latency scenarios foreseen for 5G networks, specially for Tactile Internet. The paper also presents analytical approximations that can be used to estimate the bit error rate of GFDM and WHT-GFDM over frequency-selective channels in single shot transmission. Simulation results for encoded GFDM are included for further comparison.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {article}
}
This paper presents the combination of generalized frequency division multiplexing (GFDM) with the Walsh-Hadamard transform (WHT) to achieve a scheme that is robust against frequency-selective channels (FSC). The proposed scheme is suitable for low-latency scenarios foreseen for 5G networks, specially for Tactile Internet. The paper also presents analytical approximations that can be used to estimate the bit error rate of GFDM and WHT-GFDM over frequency-selective channels in single shot transmission. Simulation results for encoded GFDM are included for further comparison.
16.
Fettweis, G.; Boche, H.; Wiegand, T.; Zielinski, E.; Schotten, H.; Merz, P.; Hirche, S.; Festag, A.; Häffner, W.; Meyer, M.; Steinbach, E.; Kraemer, R.; Steinmetz, R.; Hofmann, F.; Eisert, P.; Scholl, R.; Ellinger, F.; Weiß, E.; Riedel, I.
The Tactile Internet Technical Report
ITU-T Technology Watch Report 2014, (https://www.itu.int/en/ITU-T/techwatch/Pages/tactile-internet.aspx).
Abstract | Links | BibTeX | Tags: mobile communication, wireless communication
@techreport{Fettweis:ITU-T-Tactile:2014,
title = {The Tactile Internet},
author = {G. Fettweis and H. Boche and T. Wiegand and E. Zielinski and H. Schotten and P. Merz and S. Hirche and A. Festag and W. Häffner and M. Meyer and E. Steinbach and R. Kraemer and R. Steinmetz and F. Hofmann and P. Eisert and R. Scholl and F. Ellinger and E. Weiß and I. Riedel},
url = {https://www.itu.int/dms_pub/itu-t/opb/gen/T-GEN-TWATCH-2014-1-PDF-E.pdf},
year = {2014},
date = {2014-09-11},
urldate = {2014-09-11},
pages = {18},
institution = {ITU-T Technology Watch Report},
abstract = {Part 1 and 2 . The vision of the Tactile Internet and its impact on society:
The Tactile Internet will find novel application fields in which to contribute to the solution of the complex challenges faced by our society, with a sample of its value to social wellbeing found in education and lifelong learning, healthcare, personal safety zones, traffic in a smart city or energy. The Internet of Things connects devices, or objects, to increase their efficiency by exploiting the potential of networking. The next wave of innovation will create the Tactile Internet, introducing numerous new opportunities for emerging technology markets and the delivery of essential public services.
In principle, all of our human senses can interact with machines, and technology’s potential in this respect is growing. The Tactile Internet will enable haptic interaction with visual feedback, with technical systems supporting not just audiovisual interaction, but also that involving robotic systems to be controlled with an imperceptible time-lag.
Part 3 - Application Fields - The potential of the Tactile Internet:
Emerging Tactile Internet application fields are progressing towards precise human-to-machine and machine-to-machine interaction, with key examples found in industry, robotics and telepresence, virtual reality, augmented reality, healthcare, road traffic, serious gaming, education and culture, and smart grid. 1-millisecond end-to-end latency is necessary in Tactile Internet applications. For technical systems to match humans’ interaction with their environment, our natural reaction times set the targets that technical specifications must meet.
The high availability and security, ultra-fast reaction times and carrier-grade reliability of the Tactile Internet will add a new dimension to human-to-machine interaction by delivering a latency low enough to build real-time interactive systems. The professional digital infrastructure will similarly revolutionize machine-to-machine interaction.
Part 4 and 5 - Infrastructure requirements & ITU framework:
The technical requirements of the Tactile Internet place extraordinary demands on future networks’ latency and reliability, security, system architecture, sensors and actuators, access networks and mobile edge-clouds. Existing infrastructures are both technically and conceptually insufficient to support the envisioned applications of the Tactile Internet, with certain areas in need of accelerated research and development. In parallel, supporting standardization systems are expected to evolve in line with the diversity of the Tactile Internet’s application areas and associated stakeholder ecosystem. Given ITU’s vital role in the global management of the wireless frequency spectrum and satellite orbits, its global reach including developing countries, and the wealth of experience in defining new-technology landscapes through the publication of the requisite standards, ITU’s unique public-private membership model offers an ideal platform for collaboration open to all invested in realizing the vision of the Tactile Internet.},
note = {https://www.itu.int/en/ITU-T/techwatch/Pages/tactile-internet.aspx},
keywords = {mobile communication, wireless communication},
pubstate = {published},
tppubtype = {techreport}
}
Part 1 and 2 . The vision of the Tactile Internet and its impact on society:
The Tactile Internet will find novel application fields in which to contribute to the solution of the complex challenges faced by our society, with a sample of its value to social wellbeing found in education and lifelong learning, healthcare, personal safety zones, traffic in a smart city or energy. The Internet of Things connects devices, or objects, to increase their efficiency by exploiting the potential of networking. The next wave of innovation will create the Tactile Internet, introducing numerous new opportunities for emerging technology markets and the delivery of essential public services.
In principle, all of our human senses can interact with machines, and technology’s potential in this respect is growing. The Tactile Internet will enable haptic interaction with visual feedback, with technical systems supporting not just audiovisual interaction, but also that involving robotic systems to be controlled with an imperceptible time-lag.
Part 3 - Application Fields - The potential of the Tactile Internet:
Emerging Tactile Internet application fields are progressing towards precise human-to-machine and machine-to-machine interaction, with key examples found in industry, robotics and telepresence, virtual reality, augmented reality, healthcare, road traffic, serious gaming, education and culture, and smart grid. 1-millisecond end-to-end latency is necessary in Tactile Internet applications. For technical systems to match humans’ interaction with their environment, our natural reaction times set the targets that technical specifications must meet.
The high availability and security, ultra-fast reaction times and carrier-grade reliability of the Tactile Internet will add a new dimension to human-to-machine interaction by delivering a latency low enough to build real-time interactive systems. The professional digital infrastructure will similarly revolutionize machine-to-machine interaction.
Part 4 and 5 - Infrastructure requirements & ITU framework:
The technical requirements of the Tactile Internet place extraordinary demands on future networks’ latency and reliability, security, system architecture, sensors and actuators, access networks and mobile edge-clouds. Existing infrastructures are both technically and conceptually insufficient to support the envisioned applications of the Tactile Internet, with certain areas in need of accelerated research and development. In parallel, supporting standardization systems are expected to evolve in line with the diversity of the Tactile Internet’s application areas and associated stakeholder ecosystem. Given ITU’s vital role in the global management of the wireless frequency spectrum and satellite orbits, its global reach including developing countries, and the wealth of experience in defining new-technology landscapes through the publication of the requisite standards, ITU’s unique public-private membership model offers an ideal platform for collaboration open to all invested in realizing the vision of the Tactile Internet.
The Tactile Internet will find novel application fields in which to contribute to the solution of the complex challenges faced by our society, with a sample of its value to social wellbeing found in education and lifelong learning, healthcare, personal safety zones, traffic in a smart city or energy. The Internet of Things connects devices, or objects, to increase their efficiency by exploiting the potential of networking. The next wave of innovation will create the Tactile Internet, introducing numerous new opportunities for emerging technology markets and the delivery of essential public services.
In principle, all of our human senses can interact with machines, and technology’s potential in this respect is growing. The Tactile Internet will enable haptic interaction with visual feedback, with technical systems supporting not just audiovisual interaction, but also that involving robotic systems to be controlled with an imperceptible time-lag.
Part 3 - Application Fields - The potential of the Tactile Internet:
Emerging Tactile Internet application fields are progressing towards precise human-to-machine and machine-to-machine interaction, with key examples found in industry, robotics and telepresence, virtual reality, augmented reality, healthcare, road traffic, serious gaming, education and culture, and smart grid. 1-millisecond end-to-end latency is necessary in Tactile Internet applications. For technical systems to match humans’ interaction with their environment, our natural reaction times set the targets that technical specifications must meet.
The high availability and security, ultra-fast reaction times and carrier-grade reliability of the Tactile Internet will add a new dimension to human-to-machine interaction by delivering a latency low enough to build real-time interactive systems. The professional digital infrastructure will similarly revolutionize machine-to-machine interaction.
Part 4 and 5 - Infrastructure requirements & ITU framework:
The technical requirements of the Tactile Internet place extraordinary demands on future networks’ latency and reliability, security, system architecture, sensors and actuators, access networks and mobile edge-clouds. Existing infrastructures are both technically and conceptually insufficient to support the envisioned applications of the Tactile Internet, with certain areas in need of accelerated research and development. In parallel, supporting standardization systems are expected to evolve in line with the diversity of the Tactile Internet’s application areas and associated stakeholder ecosystem. Given ITU’s vital role in the global management of the wireless frequency spectrum and satellite orbits, its global reach including developing countries, and the wealth of experience in defining new-technology landscapes through the publication of the requisite standards, ITU’s unique public-private membership model offers an ideal platform for collaboration open to all invested in realizing the vision of the Tactile Internet.
17.
Gaspar, I.; Mendes, L.; Matthé, M.; Michailow, N.; Festag, A.; Fettweis, G.
LTE-compatible 5G PHY Based on Generalized Frequency Division Multiplexing Proceedings Article
In: International Symposium on Wireless Communications Systems (ISWCS), Barcelona, Spain, 2014.
Abstract | Links | BibTeX | Tags: wireless communication
@inproceedings{Gaspar:ISWCS:2014,
title = {LTE-compatible 5G PHY Based on Generalized Frequency Division Multiplexing},
author = {I. Gaspar and L. Mendes and M. Matthé and N. Michailow and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/6933348},
doi = {10.1109/ISWCS.2014.6933348},
year = {2014},
date = {2014-08-26},
urldate = {2014-10-23},
booktitle = {International Symposium on Wireless Communications Systems (ISWCS)},
address = {Barcelona, Spain},
abstract = {The soft transition between generations of mobile communication systems is a desirable feature for telecommunication operators and device manufacturers. Looking to the past, clock compatibility between WCDMA and LTE allowed manufacturers to build inexpensive multi-standard devices. In this paper it is shown that GFDM, a candidate waveform for the 5G PHY layer, is able to use the LTE master clock and the same time-frequency structure as employed in today's generation of cellular systems. Two approaches for coexistence of 4G/5G waveforms are presented in the paper. The first GFDM setting is aligned with the LTE grid; in the other one GFDM acts as a secondary system to the primary LTE. The second approach introduces a new way of positioning subcarriers that further enhances the flexibility of GFDM. In addition, the paper also considers low latency aspects for autonomous and human controlled device communication in future application scenarios.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
The soft transition between generations of mobile communication systems is a desirable feature for telecommunication operators and device manufacturers. Looking to the past, clock compatibility between WCDMA and LTE allowed manufacturers to build inexpensive multi-standard devices. In this paper it is shown that GFDM, a candidate waveform for the 5G PHY layer, is able to use the LTE master clock and the same time-frequency structure as employed in today's generation of cellular systems. Two approaches for coexistence of 4G/5G waveforms are presented in the paper. The first GFDM setting is aligned with the LTE grid; in the other one GFDM acts as a secondary system to the primary LTE. The second approach introduces a new way of positioning subcarriers that further enhances the flexibility of GFDM. In addition, the paper also considers low latency aspects for autonomous and human controlled device communication in future application scenarios.
18.
Michailow, N.; Matthé, M.; Gaspar, I.; Navarro, A.; Mendes, L.; Festag, A.; Fettweis, G.
Generalized Frequency Division Multiplexing for 5th Generation Cellular Networks Journal Article
In: IEEE Transactions on Communications, vol. 62, no. 9, pp. 3045-3061, 2014.
Abstract | Links | BibTeX | Tags: wireless communication
@article{Michailow:TransComm:2014,
title = {Generalized Frequency Division Multiplexing for 5th Generation Cellular Networks},
author = {N. Michailow and M. Matthé and I. Gaspar and A. Navarro and L. Mendes and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/6871292},
doi = {10.1109/TCOMM.2014.2345566},
year = {2014},
date = {2014-08-14},
urldate = {2014-08-14},
journal = {IEEE Transactions on Communications},
volume = {62},
number = {9},
pages = {3045-3061},
abstract = {Cellular systems of the fourth generation (4G) have been optimized to provide high data rates and reliable coverage to mobile users. Cellular systems of the next generation will face more diverse application requirements: the demand for higher data rates exceeds 4G capabilities; battery-driven communication sensors need ultra-low power consumption; and control applications require very short response times. We envision a unified physical layer waveform, referred to as generalized frequency division multiplexing (GFDM), to address these requirements. In this paper, we analyze the main characteristics of the proposed waveform and highlight relevant features. After introducing the principles of GFDM, this paper contributes to the following areas: 1) the means for engineering the waveform's spectral properties; 2) analytical analysis of symbol error performance over different channel models; 3) concepts for MIMO-GFDM to achieve diversity; 4) preamble-based synchronization that preserves the excellent spectral properties of the waveform; 5) bit error rate performance for channel coded GFDM transmission using iterative receivers; 6) relevant application scenarios and suitable GFDM parameterizations; and 7) GFDM proof-of-concept and implementation aspects of the prototype using hardware platforms available today. In summary, the flexible nature of GFDM makes this waveform a suitable candidate for future 5G networks.},
keywords = {wireless communication},
pubstate = {published},
tppubtype = {article}
}
Cellular systems of the fourth generation (4G) have been optimized to provide high data rates and reliable coverage to mobile users. Cellular systems of the next generation will face more diverse application requirements: the demand for higher data rates exceeds 4G capabilities; battery-driven communication sensors need ultra-low power consumption; and control applications require very short response times. We envision a unified physical layer waveform, referred to as generalized frequency division multiplexing (GFDM), to address these requirements. In this paper, we analyze the main characteristics of the proposed waveform and highlight relevant features. After introducing the principles of GFDM, this paper contributes to the following areas: 1) the means for engineering the waveform's spectral properties; 2) analytical analysis of symbol error performance over different channel models; 3) concepts for MIMO-GFDM to achieve diversity; 4) preamble-based synchronization that preserves the excellent spectral properties of the waveform; 5) bit error rate performance for channel coded GFDM transmission using iterative receivers; 6) relevant application scenarios and suitable GFDM parameterizations; and 7) GFDM proof-of-concept and implementation aspects of the prototype using hardware platforms available today. In summary, the flexible nature of GFDM makes this waveform a suitable candidate for future 5G networks.
19.
Anwar, K.; Datta, R.; Festag, A.; Fettweis, G.; Galdo, G.; Gurgul, S.; Juntti, M.; Khalife, H.; Komulainen, P.; Schneider, C.; Szott, S.; Tafazolli, R.; Thomä, R.; Wszolek, J.; Xiao, P.; Yi, N.
RESCUE: Links-on-the-fly Technology for Robust, Efficient and Smart Communication in Unpredictable Environments Proceedings Article
In: European Conference on Networks and Communications (EuCNC), Bologna, Italy, 2014.
Links | BibTeX | Tags: optimization, wireless communication
@inproceedings{Anwar:EUCNC:2014,
title = {RESCUE: Links-on-the-fly Technology for Robust, Efficient and Smart Communication in Unpredictable Environments},
author = {K. Anwar and R. Datta and A. Festag and G. Fettweis and G. Galdo and S. Gurgul and M. Juntti and H. Khalife and P. Komulainen and C. Schneider and S. Szott and R. Tafazolli and R. Thomä and J. Wszolek and P. Xiao and N. Yi},
url = {https://www.eucnc.eu/files/EuConNeCts-ProgramTemplate_final_RR_v2.pdf},
year = {2014},
date = {2014-06-24},
urldate = {2014-06-24},
booktitle = {European Conference on Networks and Communications (EuCNC)},
address = {Bologna, Italy},
keywords = {optimization, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
20.
Danneberg, M.; Datta, R.; Festag, A.; Fettweis, G.
Experimental Testbed for 5G Cognitive Radio Access in 4G LTE Cellular Systems Proceedings Article
In: IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), A Coruna, Spain, 2014.
Abstract | Links | BibTeX | Tags: cognitive radio, wireless communication
@inproceedings{Danneberg:SAM:2014,
title = {Experimental Testbed for 5G Cognitive Radio Access in 4G LTE Cellular Systems},
author = {M. Danneberg and R. Datta and A. Festag and G. Fettweis},
url = {https://ieeexplore.ieee.org/document/6882406},
doi = {10.1109/SAM.2014.6882406},
year = {2014},
date = {2014-06-22},
urldate = {2014-08-25},
booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)},
address = {A Coruna, Spain},
abstract = {Cognitive radio technology addresses the limited availability of wireless spectrum and inefficiency of spectrum usage. Cognitive Radio (CR) devices sense their environment, detect spatially unused spectrum and opportunistically access available spectrum without creating harmful interference to the incumbents. In cellular systems with licensed spectrum, the efficient utilization of the spectrum as well as the protection of primary users is equally important, which imposes opportunities and challenges for the application of CR. This paper introduces an experimental framework for 5G cognitive radio access in current 4G LTE cellular systems. It can be used to study CR concepts in different scenarios, such as 4G to 5G system migrations, machine-type communications, device-to-device communications, and load balancing. Using our framework, selected measurement results are presented that compare Long Term Evolution (LTE) Orthogonal Frequency Division Multiplex (OFDM) with a candidate 5G waveform called Generalized Frequency Division Multiplexing (GFDM) and quantify the benefits of GFDM in CR scenarios.},
keywords = {cognitive radio, wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Cognitive radio technology addresses the limited availability of wireless spectrum and inefficiency of spectrum usage. Cognitive Radio (CR) devices sense their environment, detect spatially unused spectrum and opportunistically access available spectrum without creating harmful interference to the incumbents. In cellular systems with licensed spectrum, the efficient utilization of the spectrum as well as the protection of primary users is equally important, which imposes opportunities and challenges for the application of CR. This paper introduces an experimental framework for 5G cognitive radio access in current 4G LTE cellular systems. It can be used to study CR concepts in different scenarios, such as 4G to 5G system migrations, machine-type communications, device-to-device communications, and load balancing. Using our framework, selected measurement results are presented that compare Long Term Evolution (LTE) Orthogonal Frequency Division Multiplex (OFDM) with a candidate 5G waveform called Generalized Frequency Division Multiplexing (GFDM) and quantify the benefits of GFDM in CR scenarios.