Analysis of SSC-MRC hybrid diversity combining technique
Guo Dong-mei · Applied science and technology · 2010
Diversity combining technique is an effective means against multi-path fading,and it has contradiction between system complexity and system performance in normal diversity combining like MRC(maximal-ratio combining),EGC(equal gain combining),SC(selective combining),SSC(switch-and-stay combining),etc.So it is necessary to look for a new combining technique,which is easy to be realized and has acceptable performances.The hybrid diversity combining technique SSC-MRC combines the low cost and simple structure of SSC and the high performance of MRC.The authors derived the expression of SSC-MRC hybrid combining for output SNR PDF(probability density function) and BER(bit error rate) with BPSK(binary phase shift keying) signal in case of 2L branches in Rayleigh fading channel and analyzed the influence of system with variable threshold.Experimental results show that the performance of four branches SSC-MRC hybrid diversity combining is not as good as four branches MRC,but it matters that the hybrid diversity combining can save two receivers,which greatly reduces the cost and system complexity.