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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)

作者： Sharifian, Shaham Gulliver, T. Aaron Univ Victoria Dept Elect & Comp Engn Victoria BC V8W 2Y2 Canada

ISBN: (纸本)9781479915019

The problem of full data exchange in multi-way relay channels (MWRCs) was considered in [1]. The algorithm proposed provides a throughput of 1/1.5N symbol per user per channel use (sym/U/CU) with binary signaling, which is a 33% increase compared to traditional relaying. In this paper, we analyze the average total energy consumption of the users for the proposed algorithm and compare it with traditional relaying. We also compare the power efficiency and error performance of this relaying scheme with other relaying techniques.

关键词： Relay channels physical-layer network coding cooperative communication

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Decoding Options for Trellis Codes in the Two-Way Relay Channel

Decoding Options for Trellis Codes in the Two-Way Relay Chan...

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IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

作者： Vitiello, Carmine Pfletschinger, Stephan Luise, Marco Univ Pisa Dept Informat Engn Via Caruso 16 I-56122 Pisa Italy CTTC Barcelona 08860 Spain

ISBN: (纸本)9781467355773

We study the application of trellis codes to physical-layer network coding in the two-way relay channel. In particular, we consider quaternary decoding on a combined trellis as an alternative to binary decoding and evaluate its gain in several scenarios, including asymmetric channels and the combination of different codes. We focus on the multiple-access phase, in which both terminals transmit their messages simultaneously, while in the second phase the relay retransmits the network-coded combination of both messages. We also evaluate the performance of both options when decoding the individual message of each terminal.

关键词： physical-layer network coding convolutional codes non-binary decoding

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TWO-WAY RELAYING VIA MODULO-AND-FORWARD FOR MIMO SIGNAL TRANSMISSION

TWO-WAY RELAYING VIA MODULO-AND-FORWARD FOR MIMO SIGNAL TRAN...

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IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Lin, David W. Chung, I-Chou A. Natl Chiao Tung Univ Dept Elect Engn Hsinchu 30010 Taiwan Natl Chiao Tung Univ Inst Elect Hsinchu 30010 Taiwan

ISBN: (纸本)9781479903566

Two-way relaying via the amplify-and-forward technique has received much recent attention. A modulo-and-forward (MF) variant of it has recently been proposed for single-antenna transmission, which c an significantly reduce the peak and average relay transmission powers. The present work considers two-way relaying for multi-input multi-output (MIMO) signal transmission. We propose an MF technique for Alamouti space-time coding and spatial multiplexing. Simulation results confirm the advantage of the proposed technique in enhancing the peak and average power efficiency of the relay.

关键词： MIMO modulo-and-forward physical-layer network coding two-way relay

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Improving the Capacity of Large-Scale Wireless networks with network-Assisted coding Schemes

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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2012年第1期11卷 88-96页

作者： Zhang, Tao Lu, Kejie Fu, Shengli Qian, Yi Liu, Wang Wang, Jianping New York Inst Technol New York NY USA Univ Puerto Rico Mayaguez PR USA Univ N Texas Denton TX 76203 USA Univ Nebraska Lincoln NE USA Univ Sci & Technol China Hefei Peoples R China City Univ Hong Kong Hong Kong Hong Kong Peoples R China

In this paper, we investigate the throughput capacity of large-scale wireless networks, in which three network-assisted coding schemes are considered: (1) multi-point-to-point coding (MPPC);(2) MPPC based network coding (NC);and (3) MPPC based physical-layer network coding (PLNC). This study is based on the generalized physical model, in which the transmission rate depends on the signal to noise and interference ratio (SINR). Such a model has not been used to analyze the behaviors of large-scale wireless networks with the aforementioned coding schemes. To understand the capacity gains of these schemes, we develop constructive lower bounds for one-dimensional (1D) and two-dimensional (2D) networks with size factor w, in which we construct novel wireless highway systems. This study shows that, compared to point-to-point coding (PPC), MPPC can improve the scaling law of network capacity when w exceeds a certain scale. In addition, this study reveals that MPPC based NC and PLNC can improve the capacity by constant factors. Specifically, NC can always obtain a gain of 2 in both 1D and 2D networks. On the other hand, the gain of PLNC can be larger than 2 in 1D networks, and can be up to 2 in 2D networks, depending on w, transmission power, noise, and path-loss of propagation.

关键词： Large-scale wireless networks throughput capacity point-to-point coding physical-layer network coding

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Outage Probability Analysis of Asymmetrical Bi-directional Multi-Relay System Based on network coding

Outage Probability Analysis of Asymmetrical Bi-directional M...

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14th IEEE International Conference on Communication Technology (ICCT)

作者： Liang, Wenwen Ma, Wenfeng Tian, Hua Xu, Youyun Xu, Kui PLA Univ Sci & Technol Inst Commun Engn Nanjing 210007 Jiangsu Peoples R China

ISBN: (纸本)9781467321013;9781467321006

In this paper, we construct a practical asymmetrical bi-directional multi-relay system model with considering the effect of distance between source nodes and destination nodes. Then two outage probability expressions of the system based on network coding and physical-layer network coding with decode-and-forward are given. Theory analysis is proved correct by Monte Carlo simulations. Also we analyze the system average outage probability with different situations of power allocation coefficient, locations of the relay nodes, SNR and the number of relay nodes, indicating the inherent relationship between power allocation coefficient and total system power as well as the number of relay nodes. Simulation results indicate that the optimal power allocation coefficient of the system based on network coding and physical-layer network coding varies with respect to the distance between source nodes and destination nodes, and the outage probability of physical-layer network coding outperforms network coding scheme. Meanwhile, simulation results show that the system outage probability performance improves with the number of relay nodes increasing.

关键词： Asymmetrical Bi-directional Multi-relay System Outage Probability network coding physical-layer network coding Power Allocation Coefficient

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Convolutional Codes in Two-Way Relay networks with Rate Diverse network coding

Convolutional Codes in Two-Way Relay Networks with Rate Dive...

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World Congress on Information and Communication Technologies (WICT)

作者： Cheng, Ping Hao, Jianjun Guo, Yijun Beijing Univ Posts & Telecommun Beijing Key Lab Network Syst Architecture & Conve Beijing 100088 Peoples R China

ISBN: (纸本)9781467348041

In two-way relay networks (TWRNs) with physical-layer network coding (PNC), introduction of convolutional codes is able to enhance the overall system reliability. In addition, the relay node has to determine a particular broadcast rate for coded packets transmission as the selected rate should be supported on the worst quality links to the intended receivers. Thus, the throughput gain brought by network coding is limited by capacity of the worst link in TWRNs. In this paper, a novel symbol-level rate diverse network coding (RDNC) scheme and reduced-state decoding scheme for convolutional codes are proposed to address the two problems. In this setup, for a given memory length constraint, two source nodes can adopt convolutional codes of different lengths and use reduced-state trellis to reduce decoding complexity. In this work, it is shown that the proposed approach is able to improve system throughput significantly, offer increased reliability, and reduce the complexity of convolutional codes decoding at the same time.

关键词： Two-way relay network physical-layer network coding rate diverse network coding multiple access channel convolutional code Viterbi algorithm rate-diverse broadcast wireless link quality

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Performance of physical-layer network Coded Multi-Way Relay Channels with Binary Signaling

Performance of Physical-Layer Network Coded Multi-Way Relay ...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： Shaham Sharifian T. Aaron Gulliver Department of Electrical and Computer Engineering University of Victoria

ISBN: (纸本)9781479915002

关键词： Relay channels physical-layer network coding Cooperative communication relay channel cooperative communication Binary Signaling relaying hierarchical network dynamic efficiency physical layer error performance

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TWO-WAY RELAYING VIA MODULO-AND-FORWARD FOR MIMO SIGNAL TRANSMISSION

TWO-WAY RELAYING VIA MODULO-AND-FORWARD FOR MIMO SIGNAL TRAN...

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： David W. Lin I-Chou A. Chung Department of Electronics Engineering and Institute of Electronics National Chiao Tung University Hsinchu Taiwan 30010 R.O.C.

ISBN: (纸本)9781479903573

Two-way relaying via the amplify-and-forward technique has received much recent attention, A modulo-and-forward (MFJ variant of it has recently been proposed for single-antenna transmission, which can significantly reduce the peak and average relay transmission powers. The present work considers two-way relaying for multi-input multi-output (MIMO) signal transmission. We propose an MF technique for Alamouti space-time coding and spatial multiplexing. Simulation results confirm the advantage of the proposed technique in enhancing the peak and average power efficiency of the relay.

关键词： MIMO modulo-and-forward physical-layer network coding two-way relay

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Reduced-Dimension Cooperative Precoding for MIMO Two-Way Relay Channels

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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2012年第11期11卷 4150-4160页

作者： Yang, Tao Yuan, Xiaojun Collings, Iain B. CSIRO ICT Ctr Marsfield NSW Australia Chinese Univ Hong Kong Dept Informat Engn Inst Network Coding Hong Kong Hong Kong Peoples R China

We investigate efficient communications over MIMO two-way relay channels (TWRCs) of n(T) < n(R), where n(T) denotes the number of antennas at each user and n(R) denotes that at the relay. We propose a new reduced-dimension (RD) cooperative precoding scheme. In the proposed scheme, the two users cooperatively create n(T) aligned eigen-modes, supporting n(T) streams of physical-layer network coding. We investigate the design of the RD cooperative precoder and derive an asymptotically optimal solution. We analytically show that, in the worst case, the proposed scheme is within 1/2 bit per transmit antenna of the asymptotic sum-capacity of the MIMO TWRC. For fading MIMO TWRCs with i.i.d. Gaussian coefficients, we derive a closed-form expression of the average sum-rate of the proposed scheme using large system analysis. Our analytical result shows that, for a large system with n(T)/n(R) = 1/2, the proposed scheme is less than 0.16 bit per transmit antenna away from the capacity. Furthermore, this gap reduces as n(T)/n(R) increases, and vanishes as n(T)/n(R) tends to 1. It is demonstrated that the proposed scheme can significantly outperform other existing schemes in the literature.

关键词： MIMO two-way relay channel physical-layer network coding precoding capacity

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Outage Probability Analysis of Asymmetrical Bi-directional Multi-Relay System Based on network coding

Outage Probability Analysis of Asymmetrical Bi-directional M...

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2012 IEEE 14th International Conference on Communication Technology

作者： Wenwen Liang Wenfeng Ma Hua Tian Youyun Xu Kui Xu Institute of Communications Engineering PLA University of Science and Technology

ISBN: (纸本)9781467321006

In this paper,we construct a practical asymmetrical bi-directional multi-relay system model with considering the effect of distance between source nodes and destination *** two outage probability expressions of the system based on network coding and physical-layer network coding with decode- and-forward are *** analysis is proved correct by Monte Carlo *** we analyze the system average outage probability with different situations of power allocation coefficient,locations of the relay nodes,SNR and the number of relay nodes,indicating the inherent relationship between power allocation coefficient and total system power as well as the number of relay *** results indicate that the optimal power allocation coefficient of the system based on network coding and physical-layer network coding varies with respect to the distance between source nodes and destination nodes,and the outage probability of physical-layer network coding outperforms network coding ***,simulation results show that the system outage probability performance improves with the number of relay nodes increasing.

关键词： Asymmetrical Bi-directional Multi-relay System Outage Probability network coding physical-layer network coding Power Allocation Coefficient

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