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IEEE 75th Vehicular Technology Conference (VTC Spring)

作者： Yang, Fei Huang, Meiyu Zhang, Sihai Zhou, Wuyang Univ Sci & Technol China Wireless Informat Network Lab Hefei 230026 Anhui Peoples R China

ISBN: (纸本)9781467309905;9781467309882

In this paper, performance of three-time slot (3TS) physical layer network coding (PNC) is investigated in interference-limited two-way relaying system. Effective lower and upper bounds are derived for important performance metrics like outage probability and average bit error rate (BER) with different modulation modes. Asymptotic behavior is also proposed to intuitively exhibit the trend of performance in high signal-to-interference and noise ratio (SINR) regime. We differentiate practical applications with different relay power for the bounds. A particular scenario with positional grid structure of sources, relay and co-channel interferers is established for numerical analysis, and the effects of some critical parameters, such as relay's location, forwarding capability and power allocation factor, are compared and discussed. The theoretic solutions are finally verified by simulation results.

关键词： Two-way relaying physical layer network coding co-channel interference outage probability average BER

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On Energy Efficient Routing Using Cooperative physical layer network coding

On Energy Efficient Routing Using Cooperative Physical Layer...

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IEEE Global Communications Conference (GLOBECOM)

作者： Akhtar, Auon Muhammad Nakhai, Mohammad Reza Aghvami, A. Hamid Kings Coll London Ctr Telecommun Res Strand London WC2R 2LS England

ISBN: (纸本)9781467309219;9781467309202

In this paper, we focus on energy efficient routing in wireless ad hoc networks. We exploit modulo combining of continuous-time signals arriving at a receiving node from a number of synchronized transmitting nodes and introduce a cooperative physical layer network coding (CPLNC) scheme. To demonstrate the effectiveness of the proposed scheme in saving energy, we incorporate CPLNC in two major energy-efficient routing algorithms. In the resulting modified algorithms, we derive threshold distances that enable the current node to intelligently decide whether it should use CPLNC or point to point transmission for the next hop. Simulation results confirm that the energy saving gains of the proposed new algorithms significantly outperform that of the baseline energy-efficient routing algorithms.

关键词： Cooperative transmission energy efficiency physical layer network coding routing wireless ad hoc networks

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MIMO physical layer network coding Based on VBLAST Detection

MIMO Physical Layer Network Coding Based on VBLAST Detection

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4th International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Zhang, Shengli Nie, Canping Lu, Liya Zhang, Shengqi Qian, Gongbin Shenzhen Univ Dept Commun Engn Shenzhen Peoples R China ZTE Corp Shenzhen Peoples R China

ISBN: (纸本)9781467358293;9781467358309

For MIMO two-way relay channel, this paper proposes a novel scheme, VBLAST-PNC, to transform the two superimposed packets received by the relay to their network coding form. Different from traditional schemes, which tries to detect each packet before network coding them, VBLAST-PNC detects the summation of the two packets before network coding. In particular, after firstly detecting the second layer signal in 2-by-2 MIMO system with VBLAST, we only cancel part of the detected signal, rather than canceling all the components, from the first layer. Then we directly map the obtained signal, which is a weighted summation of the first layer and the second layer, to the network coding form. With such partial interference cancellation, the error propagation effect is significantly mitigated and the performance is thus improved as shown in simulations.

关键词： Multiple Input Multiple Output physical layer network coding Two Way Relay Channel VBLAST

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A Throughput Efficient Multi-Stage Technique for Binary Multiway Relaying

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IEEE COMMUNICATIONS LETTERS 2020年第12期24卷 2969-2973页

作者： Buch, Saket D. Arunachala, Chinmayananda Rajan, B. Sundar Indian Inst Sci Dept Elect Engn Bengaluru 560012 India Indian Space Res Org Space Applicat Ctr Ahmadabad 380015 Gujarat India Indian Inst Sci Dept Elect Commun Engn Bengaluru 560012 India PES Univ Dept Elect & Commun Elect City Campus Bengaluru 560100 India

We consider binary multiway relaying with N nodes where each node demands messages of all other nodes and can only communicate via a relay. The nodes use binary transmissions. We propose two schemes requiring a maximum of 2[ N/2] + 2 channel uses (CUs) for full data exchange, which is lesser than previously published schemes for many values of N. physical layer network coding is employed at the relay with message dependent node transmissions. The schemes have lower decoding complexities, better bit error rates, and are more energy efficient compared to other schemes requiring nearly same number of CUs.

关键词： Multiway relaying physical layer network coding

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Design and Analysis of Three-Way Relay network coding Schemes Based Differential Chaos Shift Keying Communication System

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WIRELESS PERSONAL COMMUNICATIONS 2020年第1期114卷 29-47页

作者： Hasan, Fadhil Sahib Mustansiriyah Univ Elect Engn Dept Baghdad Iraq

In this paper, a three-way relay network coding schemes based differential chaos shift keying (DCSK) communication system are investigated. Two schemes of physical layer network coding (PLNC) schemes are proposed to communicate between three users. In the first scheme, three users send their information's using DCSK modulation in different time slots to the relay, then two encoded bits are extracted from the received bits. After that, the relay broadcast the two encoded bits to three users using DCSK modulation in different time slots. To improve the throughput, energy and spectral efficiency of scheme-1, a new model of PNC scheme is developed based on multiple access DCSK (MA-DCSK) and quadrature chaos shift keying (QCSK) systems. In the first phase, the users send their information's via MA-DCSK, while in the second phase, the relay broadcast the two encoded bits using QCSK system. In both schemes, the BER analytics are derived and compared with the simulated results under AWGN and multipath Rayleigh fading channel. Furthermore, throughput, link bandwidth and energy efficiency are also derived and compared for two schemes.

关键词： Differential chaos shift keying (DCSK) physical layer network coding Three-way relay Multiple access DCSK (MA-DCSK) Quadrature chaos shift keying (QCSK) Link bandwidth efficiency Multipath Rayleigh fading channel

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Parameter Estimation and Tracking in physical layer network coding

Parameter Estimation and Tracking in Physical Layer Network ...

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作者： Jain, Manish Texas A&M University

Recently, there has been a growing interest in improving the performance of the wireless relay networks through the use of physical layer network coding (PLNC) techniques. The physical layer network coding technique allows two terminals to transmit simultaneously to a relay node and decode the modulo-2 sum of the transmitted bits at the relay. This technique considerably improves performance over Digital network coding technique. In this thesis, we will present an algorithm for joint decoding of the modulo-2 sum of bits transmitted from two unsynchronized transmitters at the relay. We shall also address the problems that arise when boundaries of the signals do not align with each other and when the channel parameters are slowly varying and are unknown to the receiver at the relay node. Our approach will first jointly estimate the timing o sets and fading gains of both signals using a known pilot sequence sent by both transmitters in the beginning of the packet and then perform Maximum Likelihood detection of data using a state-based Viterbi decoding scheme that takes into account the timing o sets between the interfering signals. We shall present an algorithm for simultaneously tracking the amplitude and phase of slowly varying wireless channel that will work in conjunction our Maximum Likelihood detection algorithm. Finally, we shall provide extension of our receiver to support antenna diversity. Our results show that the proposed detection algorithm works reasonably well, even with the assumption of timing misalignment. We also demonstrate that the performance of the algorithm is not degraded by amplitude and/or phase mismatch between the users. We further show that the performance of the channel tracking algorithm is close to the ideal case i.e. when the channel estimates are perfectly known. Finally, we demonstrate the performance boost provided by the receiver antenna diversity.

关键词： physical layer network coding PLNC Wireless Relay network Per Survivor Processing PSP Thesis

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Backscatter Assisted NOMA-PLNC Based Wireless networks

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SENSORS 2021年第22期21卷 7589-7589页

作者： Rajkumar, Samikkannu Jayakody, Dushantha Nalin K. Sch Engn Ctr Telecommunicat Res Sri Lanka Technological Campus Padukka 10500 Sri Lanka Natl Res Tomsk Polytechn Univ Sch Comp Sci & Robot Tomsk 634050 Russia

In this paper, sum capacity maximization of the non-orthogonal multiple access (NOMA)-based wireless network is studied in the presence of ambient backscattering (ABS). Assuming that ABS is located next to far nodes, it improves the signal strength of far node cluster. By applying suitable successive interference cancellation (SIC) operation, far node cluster act as an internet of things (IoT) reader. Moreover, to improve the uplink performance of the nodes, a physical layer network coding (PLNC) scheme is applied in the proposed network. Power optimization is employed at the access point (AP) to enhance the downlink performance with total transmit power constraint and minimum data rate requirement per user constraint using Lagrangian's function. In addition, end-to-end outage performance of the proposed wireless network is analyzed to enhance each wireless link capacity. Numerical results evident that the outage performance of the proposed network is significantly improved while using the ABS. Furthermore, the average bit error rate (BER) performance of the proposed wireless network is studied to improve the reliability. Simulation results are presented to validate the analytical expressions.

关键词： non-orthogonal multiple access physical layer network coding ambient backscattering

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Performance Analysis of Two Way Relay Systems on Intervehicular Cooperative Communication 28

Performance Analysis of Two Way Relay Systems on Intervehicu...

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28th Signal Processing and Communications Applications Conference (SIU)

作者： Koc, Yunus Istanbul Tech Univ Bilisim Enstitusu Istanbul Turkey

ISBN: (纸本)9781728172064

Autonomous vehicles has become most popular topic and the studies related to vehicle to vehicle communication have accelerated in recent years. On this issue, as a concept of cooperative communication which means communication of vehicles with other vehicles or any other fixed access points comes forward. Moreover, diversity techniques, combining methods, physical layer network coding and optimum relay selection are also taken into account to provide fast, reliable and high error performance. In this study, cooperative communication systems are performed in vehicle and fixed access relay assisted point of views. On the other hand, the adventages of increasing number of relays and optimum relay selection are examined by performing physical layer network coding based cooperative communication systems at two way multi relay network. Performance analysis and evaluations are also provided by using symbol error rate and outage probability metrics at the end of the study.

关键词： Cooperative communication diversity combining physical layer network coding optimum relay selection two way communication cascade fading channels

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physical layer network coding and Precoding for the Two-Way Relay Channel in Cellular Systems

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2011年第2期59卷 696-712页

作者： Ding, Zhiguo Krikidis, Ioannis Thompson, John Leung, Kin K. Newcastle Univ Sch Elect Elect & Comp Engn Newcastle Upon Tyne NE1 7RU Tyne & Wear England Univ Edinburgh Sch Engn & Elect Edinburgh Midlothian Scotland Univ Edinburgh Inst Digital Commun Edinburgh EH9 3JL Midlothian Scotland Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn London SW7 2BT England

In this paper, we study the application of physical layer network coding to the joint design of uplink and downlink transmissions, where the base station and the relay have multiple antennas, and all mobile stations only have a single antenna. A new network coding transmission protocol is proposed, where uplink and downlink transmissions can be accomplished within two time slots. Since each single antenna user has poor receive capability, precoding at the base station and relay has been carefully designed to ensure that co-channel interference can be removed completely. Explicit analytic results have been developed to demonstrate that the multiplexing gain achieved by the proposed transmission protocol is, much better than existing time sharing schemes. To further increase the achievable diversity gain, two variations of the proposed transmission protocols have also been proposed when there are multiple relays and the number of the antennas at the base station and relay is increased. Monte-Carlo simulation results have also been provided to demonstrate the performance of the proposed network coded transmission protocol.

关键词： physical layer network coding precoding design two-way relaying channel uplink and downlink design

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Bound Analysis of physical layer network coding in Interference-Limited Two-way Relaying System

Bound Analysis of Physical Layer Network Coding in Interfere...

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IEEE Vehicular Technology Conference

作者： Fei Yang Meiyu Huang Sihai Zhang Wuyang Zhou Wireless Information Network Laboratory University of Science and Technology of China Hefei Anhui P. R. China 230026

ISBN: (纸本)9781467309899

In this paper, performance of three-time slot (3TS) physical layer network coding (PNC) is investigated in interference-limited two-way relaying system. Effective lower and upper bounds are derived for important performance metrics like outage probability and average bit error rate (BER) with different modulation modes. Asymptotic behavior is also proposed to intuitively exhibit the trend of performance in high signalto- interference and noise ratio (SINR) regime. We differentiate practical applications with different relay power for the bounds. A particular scenario with positional grid structure of sources, relay and co-channel interferers is established for numerical analysis, and the effects of some critical parameters, such as relay;s location, forwarding capability and power allocation factor, are compared and discussed. The theoretic solutions are finally verified by simulation results.

关键词： Two-way relaying physical layer network coding co-channel interference outage probability average BER

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