空时接收并行干扰消除器的性能分析及优化

提出一种新的用于DS-CDMA系统上行链路阵列接收加部分并行干扰消除的联合处理方案。在接收端多径信号的阵列处理方面,将传统的RAKE接收改为LS-DRMTA算法,能大大降低基站处理的运算量。在波束形成器之后引入干扰对消器,对传统的并行干扰消除器“硬判决”的缺陷进行优化,改为部分并行干扰消除器,可以更好地检测出期望用户信号,而且避免了消除串行干扰中存在延时问题,仿真结果表明,该联合处理方案简单有效,适合工程应用。

Analysis of Space-time Parallel Interference Canceller Performance and It''''s Optimization

A new combined scheme of array signals processing and partial Parallel Interference Canceller is proposed for the uplink receiving of DS-CDMA system.At the receiving end,instead of conventional RAKE receiver,the LS-DRMTA algorithm is used.The proposed algoritnm simplifies the application in DS-CDMA system.After beamforming,the use of partial PIC detector which avoid the faculties of conventional PIC and SIC is furtherly able to cancel the CCI in DS-CDMA system and performs a lower BER.This scheme is simple and effective and more suitable for using in engineering.