On the Performance of Synchronous DS—CDMA Systems with Generalized Orthogonal Spreading Codes  

作　　者：HAOLi FANPingzhi 

机构地区：[1]InstituteofMobileCommunications,SouthwestJiaotongUniversity,Chengdu610031,China

出　　处：《Chinese Journal of Electronics》2003年第2期219-224,共6页电子学报（英文版）

摘　　要：A new synchronous DS-CDMA system em-ploying generalized orthogonal (GO) spreading codes and maximum ratio combining (MRC) scheme is presented in this paper. In particular, the forward link of the system is discussed in detail. The GO codes are used to combat the interference caused by multipath components. The aver-age correlation properties of GO codes are evaluated andthe signal interference ratio (SIR) expressions based on the Rayleigh and Racian fading multipath channel models are derived respectively. The link performance in terms of bit error rate (BER) is obtained for GO codes with different orthogonal zones by Gaussian Approximation and Monte-Carlo simulation respectively. The results reveal that the GO codes appear better BER performance than traditional orthogonal codes in synchronous CDMA systems, and the GO code with larger orthogonal zone exhibits larger per-formance gain.

关 键 词：DS-CDMA 直序列码分多址 同步 多路径传播 相关函数 

分 类 号：TN914.53[电子电信—通信与信息系统]