摘要
本文讨论了混合ＤＳ－ＳＦＨ扩频多址ＳＳＭＡ通信系统在瑞利衰落信道中多径分集接收的性能。基于多径干扰、多址干扰和信道噪声之和为一个高斯随机变量的分析，推导了在等增益组合（ＥＧＣ）和选择最大（ＳＭ）多径分集接收算法下，扩频系统的平均差错概率。理论分析和数值模拟指出：扩频多径分集接收可以明显地改善ＤＳ－ＳＦＨＳＳＭＡ系统的性能，在提高系统性能方面，等增益组合算法优于选择最大分集算法。
This paper analyzes the performance of noncoherent Hybrid direct sequence(DS)slow frequency hopping (SFH) spread spectrum multiple access (SSMA) communications which are used over Rayleigh multipath fading channel. Based on the assumption that the sum of the multipath interference,multiple access interference and the channel noise is a Gaussian random variable,the approximation for the average error probability of systerms with equal gain combining (EGC)and selective maximum (SM) multipath time diversity algorithms are developed.Analysis and numerical results indicate that multipath time diversity can be used to significantly improve the performance of DS-SFH SSMA system over Rayleigh multipath fading channel and that systems with EGC diversity have improved the performance compared to SC diversity.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1996年第1期73-77,共5页
Acta Electronica Sinica
基金
国家863计划通信技术主题资助
关键词
扩频多址
多径分集
瑞利衰落信道
Spread spectum multiple access,Multipath diversity,Rayleigh fading channel
