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Zhan, M., Pang, Z., Xiao, M. & Wen, H. (2018). A state metrics compressed decoding technique for energy-efficient turbo decoder. EURASIP Journal on Wireless Communications and Networking, 2018(1), Article ID 152.
Open this publication in new window or tab >>A state metrics compressed decoding technique for energy-efficient turbo decoder
2018 (English)In: EURASIP Journal on Wireless Communications and Networking, ISSN 1687-1472, E-ISSN 1687-1499, Vol. 2018, no 1, article id 152Article in journal (Refereed) Published
Abstract [en]

In the energy resource-constrained wireless applications, turbo codes are frequently employed to guarantee reliable data communication. To both reduce the power dissipation of the turbo decoder and the probability of data frame retransmission in the physical layer, memory capacity reduced near optimal turbo decoder is of special importance from the perspective of practical implementation. In this regard, a state metrics compressed decoding technique is proposed. By inserting two modules in the conventional turbo decoding architecture, a smaller quantization scheme can be applied to the compressed state metrics. Furthermore, structure of the inserted modules is described in detail. We demonstrate that one or two rounds of compression/decompression are performed in most cases during the iterative decoding process. At the cost of limited dummy decoding complexity, the state metrics cache (SMC) capacity is reduced by 53.75%. Although the proposed technique is a lossy compression strategy, the introduced errors only have tiny negative influence on the decoding performance as compared with the optimal Log-MAP algorithm. 

Place, publisher, year, edition, pages
Springer International Publishing, 2018
Keywords
Compression, Decompression, Energy efficiency, SMC capacity, State metrics, Turbo decoder, Compaction, Energy resources, Network layers, Turbo codes, Wireless telecommunication systems, Decoding performance, Decoding techniques, Quantization schemes, Turbo decoders, Wireless application, Iterative decoding
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-236558 (URN)10.1186/s13638-018-1153-y (DOI)000447855300003 ()2-s2.0-85048603045 (Scopus ID)
Note

Funding details: 2015M570776, China Postdoctoral Science Foundation; Funding details: SWU113044, SWU, Southwest University; Funding details: 61671390, NSFC, National Natural Science Foundation of China; Funding text: This work was supported in part by the National Natural Science Foundation of China under Grant 61671390, in part by the China Postdoctoral Science Foundation under Grant 2015M570776, and in part by the Fundamental Research Fund for Central University (Southwest University) under Grant SWU113044. QC 20181127

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
Yue, J., Xiao, M., Lin, Z. & Vucetic, B. (2018). An Expanded Network Coding with Finite Buffer Size Information Dissemination Approach in Social Networks. In: 2018 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC): . Paper presented at IEEE Wireless Communications and Networking Conference (WCNC), APR 15-18, 2018, Barcelona, SPAIN. IEEE
Open this publication in new window or tab >>An Expanded Network Coding with Finite Buffer Size Information Dissemination Approach in Social Networks
2018 (English)In: 2018 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC), IEEE , 2018Conference paper, Published paper (Refereed)
Abstract [en]

A social network is a social structure made up of a set of social actors and a set of dyadic ties between these actors. The actors form a number of communities. In communities, some actors want to transmit their information to all other actors. Each actor corresponds to a user equipment (UE). The UE of the actor which has information to be transmitted is also called the source, and the UEs of all other actors are called destinations. The information is transmitted from the source to destinations with the assistance of helpers, which can be small cell base stations (SCBSs). A novel information dissemination approach, namely expanded network coding with a finite buffer size (ENCFB), is proposed for the case when the buffer size of helpers is limited. The performance comparison of the uncoded information dissemination approach, the network coded approach and the ENCFB approach is conducted. Comparison results show that the ENCFB approach can significantly improve the performance of information dissemination when the buffer size is limited.

Place, publisher, year, edition, pages
IEEE, 2018
Series
IEEE Wireless Communications and Networking Conference, ISSN 1525-3511
Keywords
Network coding, information dissemination, social networks, finite buffer size, full coverage
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-232297 (URN)000435542402040 ()2-s2.0-85049223135 (Scopus ID)978-1-5386-1734-2 (ISBN)
Conference
IEEE Wireless Communications and Networking Conference (WCNC), APR 15-18, 2018, Barcelona, SPAIN
Note

QC 20180719

Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-07-19Bibliographically approved
Yang, G., Xiao, M., Al-Zubaidy, H., Huang, Y. & Gross, J. (2018). Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays. IEEE/ACM Transactions on Networking, 26(1), 576-590
Open this publication in new window or tab >>Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays
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2018 (English)In: IEEE/ACM Transactions on Networking, ISSN 1063-6692, E-ISSN 1558-2566, Vol. 26, no 1, p. 576-590Article in journal (Refereed) Published
Abstract [en]

The abundance of spectrum in the millimeter-wave (mm-wave) bands makes it an attractive alternative for future wireless communication systems. Such systems are expected to provide data transmission rates in the order of multi-gigabits per second in order to satisfy the ever-increasing demand for high rate data communication. Unfortunately, mm-wave radio is subject to severe path loss, which limits its usability for long-range outdoor communication. In this paper, we propose a multi-hop mm-wave wireless network for outdoor communication, where multiple full-duplex buffered relays are used to extend the communication range, while providing end-to-end performance guarantees to the traffic traversing the network. We provide a cumulative service process characterization for the mm-wave propagation channel with self-interference in terms of the moment generating function of its channel capacity. Then, we then use this characterization to compute probabilistic upper bounds on the overall network performance, i.e., total backlog and end-to-end delay. Furthermore, we study the effect of self-interference on the network performance and propose an optimal power allocation scheme to mitigate its impact in order to enhance network performance. Finally, we investigate the relation between relay density and network performance under a sum power constraint. We show that increasing relay density may have adverse effects on network performance, unless the selfinterference can be kept sufficiently small.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Millimeter-wave, multi-hop, moment generating functions, delay, backlog
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-224045 (URN)10.1109/TNET.2017.2786341 (DOI)000425324000042 ()2-s2.0-85041182670 (Scopus ID)
Note

QC 20180320

Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-04-16Bibliographically approved
Xue, Q., Fang, X. & Xiao, M. (2018). Beam management for millimeter wave beamspace MU-MIMO systems. In: 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017: . Paper presented at 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017, Qingdao, China, 22 October 2017 through 24 October 2017 (pp. 1-6). Institute of Electrical and Electronics Engineers (IEEE), 2018-January
Open this publication in new window or tab >>Beam management for millimeter wave beamspace MU-MIMO systems
2018 (English)In: 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017, Institute of Electrical and Electronics Engineers (IEEE), 2018, Vol. 2018-January, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Millimeter wave (mmWave) communication has attracted increasing attention as a promising technology for 5G networks. One of the key architectural features of mmWave is the use of massive antenna arrays at both the transmitter and the receiver sides. Therefore, by employing directional beamforming (BF), both mmWave base stations (MBSs) and mmWave users (MUEs) are capable of supporting multi-beam simultaneous transmissions. However, most researches have only considered a single beam, which means that they do not make full potential of mmWave. In this context, in order to improve the performance of short-range indoor mmWave networks with multiple reflections, we investigate the challenges and potential solutions of downlink multi-user multi-beam transmission, which can be described as a high-dimensional (i.e., beamspace) multi-user multiple-input multiple-output (MU-MIMO) technique, including multi-user BF training, simultaneous users' grouping, and multi-user multi-beam power allocation. Furthermore, we present the theoretical and numerical results to demonstrate that beamspace MU-MIMO compared with single beam transmission can largely improve the rate performance of mmWave systems.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
beamspace MIMO, inter-beam interference coordination, Millimeter wave (mmWave), multi-user beamforming (BF) training
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-238255 (URN)10.1109/ICCChina.2017.8330435 (DOI)2-s2.0-85049653105 (Scopus ID)9781538645024 (ISBN)
Conference
2017 IEEE/CIC International Conference on Communications in China, ICCC 2017, Qingdao, China, 22 October 2017 through 24 October 2017
Note

QC 20181121

Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2018-11-21Bibliographically approved
Bao, J., Ma, Z., Xiao, M., Tsiftsis, T. A. & Zhu, Z. (2018). Bit-Interleaved Coded SCMA With Iterative Multiuser Detection: Multidimensional Constellations Design. Paper presented at IEEE International Conference on Communications (ICC), MAY 21-25, 2017, Paris, FRANCE. IEEE Transactions on Communications, 66(11), 5292-5304
Open this publication in new window or tab >>Bit-Interleaved Coded SCMA With Iterative Multiuser Detection: Multidimensional Constellations Design
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2018 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 66, no 11, p. 5292-5304Article in journal (Refereed) Published
Abstract [en]

This paper investigates the constellation/codebook design of a promising uplink multiple access technique, sparse code multiple access (SCMA), proposed for the fifth generation mobile networks. The application of bit-interleaved coded modulation with iterative multiuser detection is considered for uplink SCMA over fading channels. Extrinsic information transfer chart is used to aid the analysis and the design of multidimensional constellations, and the design criteria for multidimensional constellations and labelings optimization are thus established. Furthermore, a new and simple approach of multi-stage optimization for the multidimensional constellation design is proposed for SCMA, to improve the bit-error rate performance and alleviate the complexity of turbo multiuser detection. Numerical and simulation results are also provided to demonstrate the performance and verify the efficiency of the proposed scheme, compared with the state of the art.

Place, publisher, year, edition, pages
IEEE Press, 2018
Keywords
Bit-interleaved coded modulation (BICM), extrinsic information transfer (EXIT) chart, multidimensional constellations, sparse code multiple access (SCMA), turbo multiuser detection
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-239801 (URN)10.1109/TCOMM.2017.2782325 (DOI)000450191400021 ()2-s2.0-85038832845 (Scopus ID)
Conference
IEEE International Conference on Communications (ICC), MAY 21-25, 2017, Paris, FRANCE
Note

QC 20190108

Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-09Bibliographically approved
Zhan, M., Pang, Z., Dzung, D. & Xiao, M. (2018). Channel Coding for High Performance Wireless Control in Critical Applications: Survey and Analysis. IEEE Access, 6, 29648-29664
Open this publication in new window or tab >>Channel Coding for High Performance Wireless Control in Critical Applications: Survey and Analysis
2018 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 6, p. 29648-29664Article in journal (Refereed) Published
Abstract [en]

Demanded by high-performance wireless (WirelessHP) networks for industrial control applications, channel coding should be used and optimized. However, the adopted coding schemes in modern wireless communication standards are not sufficient for WirelessHP applications, in terms of both low latency and high reliability. Starting from the essential characteristics of WirelessHP regarding channel coding, this paper gives a detailed analysis of currently used short packet coding schemes in industrial wireless sensor networks, including seven coding schemes and their possible variants. The metrics employed for evaluation are bit-error rate, packet error rate, and throughput. To find suitable coding schemes from a large number of options, we propose four principles to filter the most promising coding schemes. Based on overall comparison from the perspective of practical implementation, challenges of the available coding schemes are analyzed, and directions are recommended for future research. Some reflections on how to construct specially designed coding schemes for short packets to meet the high reliability and low-latency constraints of WirelessHP are also provided.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
channel coding, Industrial wireless control, short packet, ultra-high reliability, ultra-low latency, WirelessHP
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-238221 (URN)10.1109/ACCESS.2018.2842231 (DOI)000435522600019 ()2-s2.0-85047821595 (Scopus ID)
Funder
VINNOVA, 2015-06548 and Grant 2017-02822
Note

QC 20181120

Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2018-11-20Bibliographically approved
Huang, Y., Zhang, J. & Xiao, M. (2018). Constant Envelope Hybrid Precoding for Directional Millimeter-Wave Communications. IEEE Journal on Selected Areas in Communications, 36(4), 845-859
Open this publication in new window or tab >>Constant Envelope Hybrid Precoding for Directional Millimeter-Wave Communications
2018 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 36, no 4, p. 845-859Article in journal (Refereed) Published
Abstract [en]

Millimeter wave (mmwave) communication has attracted increasing attention owing to its abundant spectrum resource. The short wavelength at mmwave frequencies facilitates placing a large number of antennas in a small space, and the mmwave channels are likely to be sparse in the directions. These two new features promise enhanced security by directional precoding. To explore this potential, we investigate the design of directional hybrid digital and analog precoding for the multiuser mmwave communication system with multiple eavesdroppers. Particularly, we consider two cost-efficient sub-connected hybrid architectures, i.e., multi-subarray architecture and switched phased- array architecture, and optimize the hybrid precoding under per-antenna constant envelope (CE) constraints. The goal of our design is to guarantee the receive quality of the legitimate users while minimizing the power leaked to the eavesdroppers, so as to realize a directional transmission for a general mmwave channel. The resulting problems are very challenging due to the nonlinear CE constraints and binary integer constraint from antenna selection. To address them, we leverage exact penalty function methods to find efficient solutions to the CE hybrid directional precoding. Our analysis shows that the proposed algorithm is able to converge to a stationary point under some mild conditions. Simulation results are finally provided to confirm the effectiveness of the proposed schemes and their superiority over the existing schemes under both single-path and multi-path mmwave channels.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
Millimeter wave communication, constant envelope precoding (CEP), physical layer security, subconnected antenna array architecture, multi-subarray architecture, switched-phased-array architecture, exact penalty function methods
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-232798 (URN)10.1109/JSAC.2018.2825820 (DOI)000438743800014 ()2-s2.0-85045337340 (Scopus ID)
Note

QC 20180802

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-06Bibliographically approved
Liu, Y., Fang, X., Xiao, M. & Mumtaz, S. (2018). Decentralized Beam Pair Selection in Multi-Beam Millimeter-Wave Networks. IEEE Transactions on Communications, 66(6), 2722-2737
Open this publication in new window or tab >>Decentralized Beam Pair Selection in Multi-Beam Millimeter-Wave Networks
2018 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 66, no 6, p. 2722-2737Article in journal (Refereed) Published
Abstract [en]

Multi-beam concurrent transmission is one of promising solutions for a millimeter-wave (mmWave) network to provide seamless handover, robustness to blockage, and continuous connectivity. Nevertheless, one of the major obstacles in multi-beam concurrent transmissions is the optimization of beam pair selection, which is essential to improve the mmWave network performance. Therefore, in this paper, we propose a novel heterogeneous multi-beam cloud radio access network (HMBCRAN) architecture which provides seamless mobility and coverage for mmWave networks. We also design a novel acquirement method for candidate beam pair links (BPLs) in HMBCRANs architecture, which reduces user power consumption, signaling overhead, and overall time consumption. Based on HMBCRANs architecture and the resulted candidate BPLs for each user equipment, a beam pair selection optimization problem aiming at maximizing network sum rate is formulated. To find the solution efficiently, the considered problem is reformulated as a non-operative game with local interaction, which only needs local information exchanging among players. A decentralized algorithm based on HMBCRANs architecture and binary loglinear learning is proposed to obtain the optimal pure strategy Nash equilibrium of the proposed game, in which a concurrent multi-player selection scheme and an information exchanging protocol among players are developed to reduce the complexity and signal overheads. The stability, optimality, and complexity of the proposed algorithm are analyzed via theoretical and simulation method. The results prove that the proposed scheme has better convergence speed and sum rate against the state-ofthe- art schemes.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
Heterogeneous multi-beam cloud radio access networks(HMBCRANs), beam pair selection, multi-beam concurrent transmission, millimeter-wave (mmWave) networks
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-240240 (URN)10.1109/TCOMM.2018.2800756 (DOI)000435225400031 ()2-s2.0-85041390467 (Scopus ID)
Note

QC 20181214

Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2018-12-14Bibliographically approved
Zhang, L., Wang, Z., Xiao, M., Wu, G., Liang, Y.-C. & Li, S. (2018). Decentralized Caching Schemes and Performance Limits in Two-Layer Networks. IEEE Transactions on Vehicular Technology, 67(12), 12177-12192
Open this publication in new window or tab >>Decentralized Caching Schemes and Performance Limits in Two-Layer Networks
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2018 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 67, no 12, p. 12177-12192Article in journal (Refereed) Published
Abstract [en]

We study the decentralized caching scheme in a two-layer network, which includes a server, multiple helpers, and multiple users. Basically, the proposed caching scheme consists of two phases, i.e., placement phase and delivery phase. In the placement phase, each helper/user randomly and independently selects contents from the server and stores them into its memory. In the delivery phase, the users request contents from the server, and the server satisfies each user through a helper. Different from the existing caching scheme, the proposed caching scheme takes into account the pre- stored contents at both helpers and users in the placement phase to design the delivery phase. Meanwhile, the proposed caching scheme exploits index coding in the delivery phase and leverages multicast opportunities, even when different users request distinct contents. Besides, we analytically characterize the performance limit of the proposed caching scheme, and show that the achievable rate region of the proposed caching scheme lies within constant margins to the information-theoretic optimum. In particular, the multiplicative and additive factors are carefully sharpened to be 1/48 and 4, respectively, both of which are better than the state of arts. Finally, simulation results demonstrate the advantage of the proposed caching scheme compared with the state of arts.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Achievable rate region, cross-layer caching, decentralized coded caching, hybrid scheme, two-layer networks
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-241009 (URN)10.1109/TVT.2018.2873723 (DOI)000454112100071 ()2-s2.0-85054470759 (Scopus ID)
Note

QC 20190109

Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-09Bibliographically approved
Yang, G., Xiao, M. & Pang, Z. (2018). Delay Analysis of Traffic Dispersion with Nakagami-m Fading in Millimeter-Wave Bands. In: : . Paper presented at IEEE Wireless Communications and Networking Conference, 15-18 April 2018 // Barcelona, Spain. Barcelona, Spain: IEEE
Open this publication in new window or tab >>Delay Analysis of Traffic Dispersion with Nakagami-m Fading in Millimeter-Wave Bands
2018 (English)Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Barcelona, Spain: IEEE, 2018
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-227345 (URN)
Conference
IEEE Wireless Communications and Networking Conference, 15-18 April 2018 // Barcelona, Spain
Projects
Wireless@KTH Seed Project “Millimeter Wave for Ultra-Reliable Low Latency Communications”
Funder
Wireless@kth
Note

QS 20180523

Available from: 2018-05-08 Created: 2018-05-08 Last updated: 2018-05-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5407-0835

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