WCDMA系统中两种多速率传输方案误码率性能比较  

Comparison of the BER Performance between Two Transmission Schemes for Variable Rate Services in a WCDMA System

作　　者：张红[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学,181信箱北京100876

出　　处：《电子学报》1999年第S1期105-108,115,共5页Acta Electronica Sinica

基　　金：国家自然科学基金!(No .698962 4 3)

摘　　要：WCDMA系统提出了单码和多码两种多速率传输方案 .文献 [1 ]用标准高斯近似 (GA)方法比较了这两种方案 ,结果表明两者性能相似 .文献 [2 ,3 ]指出 ,当接收的干扰用户功率不相等时 ,这种标准高斯近似并不准确 .本文采用改进的高斯近似 (IGA)方法进行分析 ,结果表明 :尽管两种传输方案中信号的动态范围要求不一样 ,但在AWGN信道上这两种方案的误码率性能是相同的 .Single code and multiple code transmission schemes which can provide variable rate services are presented in a WCDMA system.In [1],a standard Gaussian approximation (GA) is used to compare these schemes and it is shown that their performance is similar.However,it has been observed in [2,3] that this approximation may lead to unsatisfactory results when the received powers are unequal.In order to correct this,we will use an improved Gaussian approximation (IGA) to compare these schemes.It is shown by a finer analysis that despite the dynamic range requirements being quite different,the bit error rates of these two schemes in AWGN channel are identical.

关 键 词：单码传输 多码传输 宽带码分多址 

分 类 号：TN929.5[电子电信—通信与信息系统]