摘要
CDMA扩频通信系统在低扩频比时,路径间干扰(IPI, inter-path interference)变得非常严重。本文将块迭代干扰抵消同MMSE均衡器相结合,提出了一种适用于CDMA扩频通信系统低扩频比情况下的联合均衡块迭代软判决反馈干扰抵消(MMSE-BIIC)接收机结构。理论分析与计算机仿真表明,本文提出的MMSE-BIIC接收机同传统的Rake接收机、线性MMSE均衡器以及多级干扰抵消接收机相比在性能上有较大改善。
In CDMA spread spectrum systems, the inter-path interference becomes very serious when the spreading factor is considerably low. A receiver structure combining block iterative soft decision feedback interference cancellation with MMSE equalizer for CDMA spread spectrum systems is proposed. Theoretical analysis and computer simulation show that the performance of the proposed receiver is superior to Rake, conventional MMSE equalizer and multistage interference cancellation receiver.
出处
《通信学报》
EI
CSCD
北大核心
2003年第11期153-161,共9页
Journal on Communications
基金
国家"863"基金资助项目(863-317-03-01-02-04-20/MII-C3G-02-04-002)
