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在采用传统信号检测方式的CDMA无线通信网中,多址干扰限制了系统的容量和性能。多用户信号检测利用扩频码互相关信息在高斯信道中可以减小或消除多址干扰,缓解远近效应,增加系统容量。本文将多用户检测器直接用于平坦瑞利衰落的CDMA环境中,用分析与仿真相结合的方法讨论了典型多用户算法的误码性能。结果表明,平坦瑞利衰落信道中多用户检测算法的性能仍然优于传统检测算法。
In the CDMA wireless communication network adopting the traditional signal detection mode, multiple access interference limits the capacity and performance of the system. Multi-user signal detection Spread spectrum code cross-correlation information in the Gaussian channel can reduce or eliminate multiple access interference, ease the near and far effects, increase system capacity. In this paper, the multi-user detector is directly used in the CDMA environment with flat Rayleigh fading, and the error performance of a typical multi-user algorithm is discussed with the combination of analysis and simulation. The results show that the performance of multiuser detection algorithm in flat Rayleigh fading channel is still superior to the traditional detection algorithm.