移动通信环境下的多径衰落对传输的信号有很严重的影响,可使接收信号的幅度、相位和到达时间剧烈变化,引起接收端的信号畸变,导致通信系统性能下降。在各种抗衰落接收技术中[1],[4],分集接收技术是简单且有效的技术之一。本文首先分析了多径衰落信道模型;然后,介绍了三种分集接收技术;最后,利用计算机仿真,分析了分集接收技术对多径Rayleigh衰落信道的改善效果。 Under the environment of mobile communication, multipath fading has a serious impact on the transmitted signal, which can dramatically change the amplitude, phase and arrival time of the received signal, causing signal distortions at the receiving end, resulting in the degradation of the communication system performance. Among various anti-fading reception techniques [1], [4], diversity reception technique is one of the simple and effective techniques. In this paper, we first analyze the multipath fading channel model. Then, we introduce three kinds of diversity reception techniques. Finally, we use computer simulation to analyze the effect of diversity reception on multipath Rayleigh fading channels.