基于最大比合并的V2V通信系统的性能研究

Performance Analysis of V2V Communication System Based on Maximal Ratio Combining

基于最大比合并(maximal ratio combining,MRC),在N-Nakagami信道下,研究了V2V通信系统的性能。利用矩生成函数(moment generating function,MGF)的方法,分别采用相干检测的相移键控调制(phase shift keying,PSK),正交幅度调制(QAM),和脉冲幅度调制(PAM),推导了V2V通信系统的平均符号误码率(average symbol error probability,ASEP)的精确表达式。然后通过Monte Carlo仿真,利用推导的精确表达式,对系统的ASEP性能做了理论分析。仿真实验表明:随着衰弱系数m的增大,系统的ASEP性能是不断改善的;随着衰弱因子N的增大,系统的ASEP性能是不断减弱的。

In this paper, based on the maximal ratio combining （MRC） receiving, the performance of the V2V communication system over N-Nakagami fading channels is investigated. Based on the moment generating function （MGF） approach, the exact average symbol error probability （ASEP） expressions are derived for phase shift keying （PSK）, quadrature amplitude modulation （QAM）, pulse amplitude modulation（PAM）. Then based on the derived exact ASEP expressions, through Monte Carlo simulations, the ASEP performance is evaluated, and verify the theoretical results. It shows that the ASEP performance is improved with the fading coefficient increased, while the ASEP performance is decreased with the fading factor increased.