多用户检测中自适应串行干扰消除检测器的性能分析

Performance Analysis of Adaptive Successive Interference Canceller for Multi-user Detection

分析现有多用户检测中串行干扰消除检测器的缺陷,在该检测器中加入最小均方误差自适应算法以跟踪时变的信道环境,从而改进该检测器的性能.进行了计算机仿真,结果表明:在同等条件下,对于功率较低的用户来说,自适应串行干扰消除检测器比原有串行干扰消除检测器的性能有较为明显的改善,可消除原有检测器固有的误差累积缺陷.

This paper analyzes the limitations of successive interference canceller（SiC）for multi-user detection. By adding the least mean square（LMS） algorithm to track time-varying channel environment, the biterror-rate（BER）performance of the canceller improves. The result of computer simulation demonstrates that on equal conditions, to the lower power user, the adaptive successive interference canceller（ASIC）has better performance than the original successive interference canceller and can eliminate the defect of accumulated errors intrinsic in original testers.