上行链路MC-CDMA系统并行干扰抵消接收机的改进

介绍了上行链路MC-CDMA系统的一种初级采用线性MMSE检测的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,提出了一种新的基于部分并行干扰抵消的多级PIC接收机结构,他是通过每级乘以一个不同的部分相消因子实现的。在不考虑信道估计误差的情况下,仿真了上行信道不同用户数、不同部分相消因子对改进的接收机性能的影响。仿真结果表明改进的接收机具有更好的误码率性能。

Improvement on the Parallel Interference Cancellation Receiver for Uplink MCCDMA System

For uplink MC-CDMA system,a Parallel Interference Cancellation(PIC) multiuser receiver employed linear MMSE detection as the initial stage is introduced.In order to reduce the error propagation brought by the inaccuracy of initial decision,a novel multistage partial PIC receiver which is achieved by means of the multiplication by a different partial cancellation factor at each stage is proposed.Without consideration of channel estimation error,the effect of different users and different partial cancellation factors on the improved receiver is simulated.simulation results indicate that the improved receiver can be obtained better BER performance.