PDF Icon Extremely Large Aperture Massive MIMO: Low Complexity Receiver Architectures

Extremely Large Aperture Massive MIMO: Low Complexity Receiver Architectures

Amiri, A., Angjelichinoski, M., Carvalho, E. D. & Heath Jr, R. W., 13 Dec 2018, (Accepted/In press) IEEE Globecom 2018 Workshops. IEEE, 6 p.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

This paper focuses on new communication paradigms arising in massive multiple-input-multiple-output systems where the antenna array at the base station is of extremely large dimension (xMaMIMO). Due to the extreme dimension of the array, xMaMIMO is characterized by spatial non-stationary field properties along the array; this calls for a multi-antenna transceiver design that is adapted to the array dimension but also its non-stationary properties. We address implementation aspects of xMaMIMO, with computational efficiency as our primary objective. To reduce the computational burden of centralized schemes, we distribute the processing into smaller, disjoint subarrays. Then, we consider several low-complexity data detection algorithms as candidates for uplink communication in crowded xMaMIMO systems. Drawing inspiration from coded random access, one of the main contributions of the paper is the design of low complexity scheme that exploits the non-stationary nature of xMaMIMO systems and where the data processing is decentralized. We evaluate the bit-error-rate performance of the transceivers in crowded xMaMIMO scenarios. The results confirm their practical potential.
Original languageEnglish
Title of host publicationIEEE Globecom 2018 Workshops
Number of pages6
PublisherIEEE
Publication date13 Dec 2018
Publication statusAccepted/In press - 13 Dec 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon An Experimental Study of Massive MIMO Properties in 5G Scenarios

An Experimental Study of Massive MIMO Properties in 5G Scenarios

Martinez, A. O., Nielsen, J. Ø., Carvalho, E. D. & Popovski, P., Dec 2018, In : I E E E Transactions on Antennas and Propagation. 66, 12, p. 7206-7215 10 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Original languageEnglish
JournalI E E E Transactions on Antennas and Propagation
Volume66
Issue number12
Pages (from-to)7206-7215
Number of pages10
ISSN0018-926X
DOI
Publication statusPublished - Dec 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon Common-Message Broadcast Channels with Feedback in the Nonasymptotic Regime: Stop Feedback

Common-Message Broadcast Channels with Feedback in the Nonasymptotic Regime: Stop Feedback

Trillingsgaard, K. F., Yang, W., Durisi, G. & Popovski, P., 1 Dec 2018, In : I E E E Transactions on Information Theory. 64, 12, p. 7686-7718 33 p., 8456639.

Research output: Contribution to journalJournal articleResearchpeer-review

We investigate the maximum coding rate for a given average blocklength and error probability over a $K$-user discrete memoryless broadcast channel for the scenario where a common message is transmitted using variable-length stop-feedback codes. For the point-to-point case, Polyanskiy et al. (2011) demonstrated that variable-length coding combined with stop-feedback significantly increases the speed of convergence of the maximum coding rate to capacity. This speed-up manifests itself in the absence of a square-root penalty in the asymptotic expansion of the maximum coding rate for large blocklengths, i.e., zero dispersion. In this paper, we present nonasymptotic achievability and converse bounds on the maximum coding rate of the common-message $K$-user discrete memoryless broadcast channel, which strengthen and generalize the ones reported in Trillingsgaard et al. (2015) for the two-user case. An asymptotic analysis of these bounds reveals that zero dispersion cannot be achieved for certain common-message broadcast channels (e.g., the binary symmetric broadcast channel). Furthermore, we identify conditions under which our converse and achievability bounds are tight up to the second order. Through numerical evaluations, we illustrate that our second-order expansions approximate accurately the maximum coding rate and that the speed of convergence to capacity is indeed slower than for the point-to-point case.

Original languageEnglish
Article number8456639
JournalI E E E Transactions on Information Theory
Volume64
Issue number12
Pages (from-to) 7686-7718
Number of pages33
ISSN0018-9448
DOI
Publication statusPublished - 1 Dec 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon 5G and Cellular Networks in the Smart Grid

5G and Cellular Networks in the Smart Grid

Nielsen, J. J., Jorguseski, L., Zhang, H., Ganem, H., Zhu, Z. & Popovski, P., Nov 2018, Transportation and Power Grid in Smart Cities: Communication Networks and Services. Wiley, p. 69-102 34 p.

Research output: Contribution to book/anthology/report/conference proceedingBook chapterResearchpeer-review

Wireless cellular networks will help Distribution System Operators (DSOs) to achieve observability below the substation level, which is needed to ensure stable operation in the smart grid. Both existing and upcoming cellular technologies are considered as candidates for helping to enable the smart grid. In the present chapter, we present the main features of both the non-3GPP technologies, IEEE 802.11ah, SigFox and LoRa, and the main features of past, current and future 3GPP technologies, namely releases <12 (High rate), 12-14 (IoT extensions) and 15-16 (5G). Additionally, we present the challenges and possible solutions for ensuring end-to-end security in smart grid systems.
Original languageEnglish
Title of host publicationTransportation and Power Grid in Smart Cities: Communication Networks and Services
Number of pages34
PublisherWiley
Publication dateNov 2018
Pages69-102
Chapter3
ISBN (Print)978-1-119-36008-7
Publication statusPublished - Nov 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon Short Packet Structure for Ultra-Reliable Machine-Type Communication: Tradeoff between Detection and Decoding

Short Packet Structure for Ultra-Reliable Machine-Type Communication: Tradeoff between Detection and Decoding

Bana, A-S., Trillingsgaard, K. F., Popovski, P. & Carvalho, E. D., 13 Sep 2018, 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 5 p. (Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Machine-type communication requires rethinking of the structure of short packets due to the coding limitations and the significant role of the control information. In ultra-reliable low-latency communication (URLLC), it is crucial to optimally use the limited degrees of freedom (DoFs) to send data and control information. We consider a URLLC model for short packet transmission with acknow 1-edgement (ACK). We compare the detection/decoding performance of two short packet structures: (1) time-multiplexed detection sequence and data; and (2) structure in which both packet detection and data decoding use all DoFs. Specifically, as an instance of the second structure we use superimposed sequences for detection and data. We derive the probabilities of false alarm and misdetection for an AWGN channel and numerically minimize the packet error probability (PER), showing that for delay-constrained data and ACK exchange, there is a tradeoff between the resources spent for detection and decoding. We show that the optimal PER for the superimposed structure is achieved for higher detection overhead. For this reason, the PER is also higher than in the preamble case. However, the superimposed structure is advantageous due to its flexibility to achieve optimal operation without the need to use multiple codebooks.
Original languageEnglish
Title of host publication2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Number of pages5
PublisherIEEE
Publication date13 Sep 2018
ISBN (Print)978-1-5386-4659-5
ISBN (Electronic)978-1-5386-4658-8
DOI
Publication statusPublished - 13 Sep 2018
Publication categoryResearch
Peer-reviewedYes
Event2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) - Calgary, Canada
Duration: 15 Apr 201820 Apr 2018
https://2018.ieeeicassp.org/

Conference

Conference2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
LandCanada
ByCalgary
Periode15/04/201820/04/2018
Internetadresse
SeriesProceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing
ISSN1520-6149

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PDF Icon Random Access Schemes in Wireless Systems with Correlated User Activity

Random Access Schemes in Wireless Systems with Correlated User Activity

Kalør, A. E., Hanna, O. A. & Popovski, P., 24 Aug 2018, 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018. IEEE, 5 p. 8445866. (IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Original languageEnglish
Title of host publication2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
Number of pages5
PublisherIEEE
Publication date24 Aug 2018
Article number8445866
ISBN (Print)978-1-5386-3513-1
ISBN (Electronic)978-1-5386-3512-4
DOI
Publication statusPublished - 24 Aug 2018
Publication categoryResearch
Peer-reviewedYes
Event19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 - Kalamata, Greece
Duration: 25 Jun 201828 Jun 2018

Conference

Conference19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
LandGreece
ByKalamata
Periode25/06/201828/06/2018
SeriesIEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
ISSN1948-3252

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PDF Icon Uplink transmissions in URLLC systems with shared diversity resources

Uplink transmissions in URLLC systems with shared diversity resources

Kotaba, R., Navarro Manchon, C., Balercia, T. & Popovski, P., 1 Aug 2018, In : IEEE Wireless Communications Letters. 7, 4, p. 590-593 4 p., 8274949.

Research output: Contribution to journalJournal articleResearchpeer-review

Original languageEnglish
Article number8274949
JournalIEEE Wireless Communications Letters
Volume7
Issue number4
Pages (from-to)590-593
Number of pages4
ISSN2162-2337
DOI
Publication statusPublished - 1 Aug 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon Analysis of the communication traffic for blockchain synchronization of IoT devices

Analysis of the communication traffic for blockchain synchronization of IoT devices

Danzi, P., Kalør, A. E., Stefanović, Č. & Popovski, P., 27 Jul 2018, 2018 IEEE International Conference on Communications, ICC 2018 - Proceedings. IEEE, 7 p. 8422485. (I E E E International Conference on Communications).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Original languageEnglish
Title of host publication2018 IEEE International Conference on Communications, ICC 2018 - Proceedings
Number of pages7
PublisherIEEE
Publication date27 Jul 2018
Article number8422485
ISBN (Print)978-1-5386-3181-2
ISBN (Electronic) 978-1-5386-3180-5
DOI
Publication statusPublished - 27 Jul 2018
Publication categoryResearch
Peer-reviewedYes
Event2018 IEEE International Conference on Communications, ICC 2018 - Kansas City, United States
Duration: 20 May 201824 May 2018

Conference

Conference2018 IEEE International Conference on Communications, ICC 2018
LandUnited States
ByKansas City
Periode20/05/201824/05/2018
SponsorCisco, et al., Huawei, National Instruments, Qualcomm, Sprint
SeriesI E E E International Conference on Communications
ISSN1938-1883

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PDF Icon Network Slicing in Industry 4.0 Applications: Abstraction Methods and End-to-End Analysis

Network Slicing in Industry 4.0 Applications: Abstraction Methods and End-to-End Analysis

Kalør, A. E., Guillaume, R., Nielsen, J. J., Mueller, A. & Popovski, P., 23 May 2018, In : IEEE Transactions on Industrial Informatics. 14, 12, p. 5419 - 5427 9 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Original languageEnglish
JournalIEEE Transactions on Industrial Informatics
Volume14
Issue number12
Pages (from-to)5419 - 5427
Number of pages9
ISSN1551-3203
DOI
Publication statusPublished - 23 May 2018
Publication categoryResearch
Peer-reviewedYes

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PDF Icon Wireless Access for Ultra-Reliable Low-Latency Communication: Principles and Building Blocks

Wireless Access for Ultra-Reliable Low-Latency Communication: Principles and Building Blocks

Popovski, P., Nielsen, J. J., Stefanovic, C., Carvalho, E. D., Strom, E., Trillingsgaard, K. F., Bana, A. S., Kim, D. M., Kotaba, R., Park, J. & Sorensen, R. B., 1 Mar 2018, In : IEEE Network. 32, 2, p. 16-23 8 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Original languageEnglish
JournalIEEE Network
Volume32
Issue number2
Pages (from-to)16-23
Number of pages8
ISSN0890-8044
DOI
Publication statusPublished - 1 Mar 2018
Publication categoryResearch
Peer-reviewedYes

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