KM序列用作RAKE型CDMA系统扩频码的分析

Analysis of KMSequences as Spreading Codes for CDMA Systems with RAKE Receiver

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

In this paper,KM sequence is presented as a potentially spreading code for CDMA (Code division multiple access) system with RAKE receiver.First,based on a RAKE receiver modeling,the perf ormance of CDMA system with RAKE receiver is analyzed,and the properties of PN s equences that are suited to the CDMA system with RAKE receiver are showed.Next,t he advantages and disadvantages of KM sequences as spreading codes for CDM A system with RAKE receiver are analyzed systematically.Finally,the cross-corre lation functions between m sequence and KM sequence,and the average bit er r or probability (BEP) corresponding to both the sequences and Gold sequence under correlating receiver and RAKE receiver,are compared.The feasibility of KM sequence as spreading codes for CDMA system with RAKE receiver is verified.