定时误差对部分并行干扰消除检测器的影响

The impact of timing errors on partial parallel interference cancellation detector

重点分析了基于硬判决的部分并行干扰消除(PPIC)检测器的残余多址干扰的结构及统计特性,研究了PPIC在定时跟踪误差情况下的性能,并给出了其在定时误差跟踪下的封闭形式的误码表达式。实验表明:采用部分干扰因子可以抑制PIC系统性能恶化,而基于文献[4]给出的部分干扰因子可进一步改善系统性能。

By analyzing statistical characteristics of residual multiple access cancellation(MAI) in partial PIC(PPIC) detector with hard-decision, the impact of timing errors on the performance of PPIC is analyzed and the analytical expression for the probability of bit error is given in the paper. Computer simulation shows that the performance degradation of timing errors may be restrained by importing PCF in PIC receiver. and the performance can be more improved based on PCF in reference.