Improved Relay Selection Strategy of Multi-user Cooperative Communication System
Guangjian Xu · Jisuanji gongcheng · 2012
Based on multi-user non-regenerative collaborative network,this paper proposes an improved relay selection strategy of multi-user cooperative communication system.It defines an Equivalent Channel Gain(ECG),according to the channel statistical properties of source to relay and relay to the destination nodes,that is,combined with the Signal to Noise Ratio(SNR),to choose different sets of relay nodes to make outage probability of system minimum.Experimental results show that when the outage probability is 10?3 at the high SNR,this paper's algorithm outperforms All Relays Amplify-and-Forward(AAF) algorithm with about 0.2 dB SNR gain,and system resource utilization is improved.The algorithm outperforms Single Relay Amplify-and-Forward(SAF) algorithm with about 3.5 dB SNR gain.