Rayleigh衰落信道M元多码MC-CDMA系统的性能分析  

Performance Analysis of M-ary Multi-code MC-CDMA System in Rayleigh Fading Channel

作　　者：牛红波[1] 宋爱民[1] 褚振勇[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《通信技术》2008年第2期25-27,29,共4页Communications Technology

基　　金：陕西省自然科学基金(2006F22)

摘　　要：针对扩频通信中的M元多码系统,结合OFDM技术特点,提出了一种新的M元多码MC-CDMA系统。在分析系统基本原理基础上,建立了系统信号模型,对系统在Rayleigh衰落信道情况下误码性能进行了研究,推导出误码率公式,对误码性能进行了仿真。在相同传输条件下,与传统的M元多码扩频系统和MC-CDMA系统进行了对比,结果表明M元多码MC-CDMA系统在误码性能和信息传输能力上都有一定的提高。In the light of M-ary Multi-code system in Spread Spectrum Communication and in combination with the technical features of OFDM, a new M-ary Multi-code MC-CDMA system is proposed in this paper. Based on the analysis of the fundamental principles of the system, the signal model is constructed, the bit error rate of the system in rayleigh fading channel studied, and the BER expressions derived. Simulation result shows that this system could have both high efficiency and reliability as compared with traditional M-ary Multi-code system and MC-CDMA system.

关 键 词：M元多码MC-CDMA系统 瑞利衰落信道 误码率 计算机仿真 

分 类 号：TN914.4[电子电信—通信与信息系统]