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| Opportunistic Relaying and Outage Analysis for Physical-layer Network Coding |
| Ji Xiao-dong①② Zheng Bao-yu① |
①(Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China)
②(School of Electronics and Information, Nantong University, Nantong 226019, China) |
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Abstract The capacity issue of Physical-layer Network Coding (PNC) is investigated. According to the Max-Min Mutual Information (MMMI) criterion, a new opportunistic relaying scheme is proposed based on Amplify-and-Forward (AF). Then, the outage probability expressions are derived for the new proposed scheme as well as the schemes of ideal PNC and traditional direct transmission in frequency-nonselective Rayleigh fading channels. By the analysis, it is found that the system outage performance can be measured by one-way channel in some conditions, which are determined by the node transmission powers. Simulation results show that the outage performance is improved significantly when MMMI strategy is used.
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Received: 03 September 2010
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Corresponding Authors:
Ji Xiao-dong
E-mail: jixiaodong@yahoo.cn
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2011, Vol. 33 
