卷积编码正交序列扩频多码CDMA系统在Nakagami衰落信道的性能  

Performance of Convolutionally Encoded Orthogonal Sequence Multicode CDMA System over Nakagami Fading Channel

作　　者：孙文江[1] 张轶凡 张平[1] 胡健栋[1] 

机构地区：[1]北京邮电大学电信工程系,北京100876

出　　处：《电子学报》1999年第6期100-103,共4页Acta Electronica Sinica

基　　金：教委优秀教师基金;教委留学归国基金;BNR资助

摘　　要：本文提出了一种可以有效地实现用户高数据率传输的卷积编码正交扩频多码CDMA系统，以适应未来移动通信业务发展的需求．此系统相似于多载波CDMA系统，对于用户传输的高速率数据首先进行串-并转换，对变换后的低数据流再进行卷积编码，然后再进行正交序列扩频调制．不同于多载波CDMA系统，各支路扩频信号用同一载波进行调制发送．这里，对此系统在Nakagami衰落信道的性能进行了计算，并对数值结果进行了分析．In this paper, a convolutional enceded orthogonal sequence multicode CDMA system is proposed so as to transmit user's high rate data to fit the requirement of the services of the future mobile communication. Similar to multicarrier modulation, the higher rate date transmitted by serial-to-parallel is converted at first, and then the lower rate data streams are convolutionally encoded and spreaded spectrum modulated by a set of orthogonal sequence Being different from multicarrier modulationg, all lower branch data streams use single carrier. The performance of the system over Nakagami fading channel is calculated, and numerical result is analyzed.

关 键 词：卷积编码 正交序列扩频 CDMA NAKAGAMI 衰落信道 

分 类 号：TN911.22[电子电信—通信与信息系统] TN914.5[电子电信—信息与通信工程]