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本文提出将KM M序列用作RAKE型CDMA系统的扩频码 .基于一个RAKE接收机模型 ,分析了CDMA系统性能并提出了适于作RAKE型CDMA系统扩频码的PN序列的特性 .接着 ,分析了KM M序列作RAKE型CDMA系统扩频码的优劣 .最后 ,运用计算机仿真 ,比较了m序列和KM M序列的互相关特性以及在相干接收机和RAKE接收机下 ,这两种序列和Gold序列对应的系统平均误码率 ,从而证实了KM M序列作为扩频码的可行性
In this paper, the KM M sequence is proposed as a spreading code for a RAKE CDMA system. Based on a RAKE receiver model, the performance of the CDMA system is analyzed and the characteristics of a PN sequence suitable for use as a RAKE CDMA system spreading code are presented. The advantages and disadvantages of KM M sequence as RAKE CDMA system spreading code are analyzed.Finally, the cross-correlation characteristics of m sequence and KM M sequence are compared by computer simulation, and the correlation between KM sequence and coherent receiver and RAKE receiver is analyzed. And the Gold sequence corresponding to the average bit error rate of the system, thus confirming the KM M sequence as the feasibility of spreading code