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研究了随机M进制正交码直接序列扩频码分多址信号经过多径瑞利频率非选择性衰落,在非相干RAKE接收机中采用最大输出信噪比选择或最大输出选择分集接收时系统的性能;给出了两种分集接收情况下的差错概率表达式。数值计算研究了分集数、M值、多用户干扰对系统性能的影响,并对两种分集接收情况下系统的性能进行了比较
The random M-ary orthogonal code direct sequence spread spectrum code division multiple access signals are analyzed by multi-path Rayleigh frequency non-selective fading. In the non-coherent RAKE receiver, the maximum output signal-to-noise ratio is selected or the maximum output is selected for diversity reception The performance of the system is given. The error probability expressions of two kinds of diversity reception are given. The influence of diversity, M value, multi-user interference on system performance is studied numerically, and the performance of the system under two kinds of diversity reception is compared