Modeling Method of SC and MRC in Correlated Rayleigh Fading Channel
A simulation model of maximal ratio combining (MRC) and selective combining (SC) in correlated Rayleigh fading channels was established, and the probability and bit error rate performances of MRC and SC in correlated Rayleigh fading channels were analyzed theoretically in this paper. Three aspects of mean, self-correlation function and density function of envelope are discussed, and the corresponding distributing behaviors of random envelope of troposcatter channel are gotten. Result shows that the introduced model can accord with actual channel behaviors by comparing with the reference model. On the basis of channel model, the correlated channel modeling of MRC and SC are established, the bit error rate expression of MRC and SC combing with k-branch diversity are deduced fast in correlated channel, and the bit error rate formula of 2-branch correlated channel MRC and SC are given by complementary error functions. By behaviors simulation of the probability and bit error rate of SC and MRC in different correlation coefficients, the results show that the introduced method is feasible and efficient, and it can evaluate the performance of diversity reception system fast.