在多径衰落信道下FD/SSMA系统的性能分析  

Analysis and Performance of FD/SSMA Communication System over Multipath Fading Channels

作　　者：曹叶文[1,2] 项海格[1,2] 

机构地区：[1]山东工业大学 [2]北京大学

出　　处：《通信学报》1999年第3期15-21,共7页Journal on Communications

基　　金：国家教委博士点基金;山东省自然科学基金

摘　　要：多载波频率分集扩展频谱码分多址系统（ＦＤ／ＳＳＭＡ）是一种基于多载波传输，与直接序列扩展频谱码分多址系统（ＤＳ／ＳＳＭＡ）存在时间－频率对偶关系的扩频多址通信方案。在多径传输信道下，基于ＦＤ／ＳＳＭＡ信号的锐自相关和低互相关特性，本文提出ＦＤ／ＳＳＭＡ系统可以采用路径分集接收的方案。分析和模拟计算表明，在多径衰落信道下，采用路径分集方案时ＦＤ／ＳＳＭＡ系统的性能将得到明显的改善。FD/SSMA system ( Frequency Diversity Spread Spectrum Multiple Access ) is new scheme of spread spectrum system , which is based on the theory of orthogonal multicarrier technique and the time/frequency duality with DS/SSMA system . A RAKE receiver scheme is proposed for FD/SSMA system over multipath fading channels , which is based on the feature of autorelation and crosscorrelation of the FD/SSMA signal . It is shown by analyzing and simulating that the performance of FD/SSMA system over multipath fading channel will be improved great when the RAKE scheme is adopted in the receiver .

关 键 词：码分多址 扩展频谱 多径衰落信道 FD/SSMA 

分 类 号：TN914.4[电子电信—通信与信息系统] TN914.5[电子电信—信息与通信工程]