SSC-MRC 混合合并接收系统在 n-Rayleigh 信道下的性能分析

Performance Analysis of SSC-MRC Hybrid Combining Receiving System under n-Rayleigh Fading Channels

在n-Rayleigh信道下,研究了结合切换驻留合并(SSC)与最大比合并(MRC)的混合合并接收系统的平均符号误码率(ASEP)性能。基于矩生成函数(MGF)方法,推导了SSC-MRC混合合并接收系统在n-Rayleigh衰落信道上采用相干检测的M进制相移键控(PSK)、正交幅度调制(QAM)、脉冲幅度调制(PAM)等几种数字调制方式的ASEP的精确表达式,然后对不同系统条件下的ASEP性能进行了数值仿真,结果表明:随着分集支路数的增大,衰弱因子的减小,系统的ASEP性能得到了很好的改善,验证了理论分析结果的正确性。

The average symbol error probability（ASEP） of the SSC-MRC hybrid combining receiving sys-tem composed of switch-and-stay combining（SSC） and maximal ratio combining（MRC） under n-Ray-leigh fading channels is investigated in this paper. Based on the method of the moment generating function（MGF）,the exact ASEP expressions are derived for several modulation schemes,including phase shift ke-ying（PSK）,quadrature amplitude modulation（QAM）,and pulse amplitude modulation（PAM）. Then theASEP performance under different conditions is evaluated through numerical simulations and the rusultsshow that the ASEP performance is improved with the diversity branches increased,while the fading factordecreased. The theoretical analysis is verified.