摘要
研究了上行链路MC-CDMA系统中的部分干扰抵消多用户接收机方案,提出了初级采用线性MMSE检测的多级PIC多用户接收机。为了减小初级判决不精确带来的误差传播,每级乘以一个不同的部分相消因子以实现部分消除。在不考虑信道估计误差的情况下,仿真了不同用户数下该方案与传统解相关和最小均方误差多用户检测的性能比较。仿真结果表明提出的PPIC接收机具有更好的误码率性能。
This paper investigates the partial Parallel Interference Cancellation （PIC） muhiuser receiver schemes in uplink for MC-CDMA system.Multistage PIC muhiuser receiver employed linear MMSE detection as the initial stage is presented.In order to degrade the error propagation brought by the inaccuracy of initial decision,a different partial cancellation factor at each stage is multiplied to cancel partially.Regardless of the impact of channel estimation error,performance comparison with conventional MMSE and Decorrelation （DEC） muhiuser detection is demonstrated under different users.The simulation results show that partial PIC schemes outperforms MMSE and DEC.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第30期139-141,共3页
Computer Engineering and Applications
