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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/11538

Title: Joint Adaptive Network-Channel Coding for Energy-Efficient Multiple Access Relaying
Authors: Lu, Pen-Shun
Zhou, Xiaobo
Anwar, Khoirul
Matsumoto, Tad
Keywords: Multiple Access Relay Channel
different detection
automatic repeat request
joint channel-network coding
Issue Date: 2013-11-25
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: IEEE Transactions on Vehicular Technology
Volume: 63
Number: 5
Start page: 2298
End page: 2305
DOI: 10.1109/TVT.2013.2292508
Abstract: An energy-efficient orthogonal multiple access relay channel (MARC) system is developed where accumulator and differential detection (DD) are used at the source and relay nodes, respectively. However, the weak decoding capability of DD degrades the frame error fare (FER) performance of the orthogonal MARC system if the conventional decoded-and-forward relaying strategy is applied. In this paper, a novel joint adaptive network-channel coding (JANCC) technique is proposed to support DD by making efficient use of the erroneous estimates output from DD. In the JANCC technique, the destination constructs a vector identifying the indexes of the source nodes whose information parts contain errors, and sends it to the relay to request a retransmission. The relay performs network coding by taking the exclusive-OR (XOR)-operation only over the stored estimates specified by the identifier vector, which aims to avoid unnecessary erroneous estimates being coded. In addition, a bitflipping probability p_<nc> is obtained between the two sequences, one is the network-coded sequence sent from the relay, and the other is their corresponding XOR-ed information sequence. The decoding algorithm of JANCC exploits the probability p_<nc> at the destination to update the Log-Likelihood Ratio during the iterative decoding process. Hence, the information sequences received at the destination are able to be recovered even though the redundancy forwarded from the relay is generated from the erroneous estimates. Compared with the system where the iterative decoding is performed at the relay, the utilization of DD significantly reduces the computational complexity, which leads to meaningful power saving with only a small loss in the FER performance.
Rights: This is the author's version of the work. Copyright (C) 2013 IEEE. IEEE Transactions on Vehicular Technology, 63(5), 2013, 2298-2305. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
URI: http://hdl.handle.net/10119/11538
Material Type: author
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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