NDLI: Pairwise Check Decoding for LDPC Coded Two-Way Relay Block Fading Channels

Content Provider	IEEE Xplore Digital Library
Author	Liu, Jianquan Tao, Meixia Xu, Youyun
Copyright Year	1972
Abstract	Partial decoding has the potential to achieve a larger capacity region than full decoding in two-way relay (TWR) channels. Existing partial decoding realizations are however designed for Gaussian channels and with a static physical layer network coding (PLNC). In this paper, we propose a new solution for joint network coding and channel decoding at the relay, called pairwise check decoding (PCD), for low-density parity-check (LDPC) coded TWR system over block fading channels. The main idea is to form a check relationship table (check-relation-tab) for the superimposed LDPC coded packet pair in the multiple access (MA) phase in conjunction with an adaptive PLNC mapping in the broadcast (BC) phase. Using PCD, we then present a partial decoding method, two-stage closest-neighbor clustering with PCD (TS-CNC-PCD), with the aim of minimizing the worst pairwise error probability. Moreover, we propose the minimum correlation optimization (MCO) for selecting the better check-relation-tabs. Simulation results confirm that the proposed TS-CNC-PCD offers a sizable gain over the conventional XOR with belief propagation (BP) in fading channels.
Starting Page	2065
Ending Page	2076
Page Count	12
File Size	717821
File Format	PDF
ISSN	00906778
Volume Number	60
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Parity check codes Relays Fading Encoding Modulation Network coding closest-neighbor clustering Two-way relaying block fading channel LDPC physical layer network coding partial decoding pairwise check decoding
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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