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)
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.
2011, Vol. 33 
