基于多星分集的Rake接收性能研究  

Research on Rake Receiving Performance Based on Multi-satellite Diversity

作　　者：于开勇[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2014年第4期62-66,共5页Radio Engineering

摘　　要：在低轨卫星CDMA移动通信系统中,信关站的上空会同时存在至少2颗卫星。针对这一特点,综合考虑低轨卫星通信信道的特性,研究分析了在信关站端采用的多星分集和Rake接收技术,提出了一种基于快速收敛LMS算法(FC-LMS)的多径合并方案,实现对信道变化的实时跟踪。仿真结果表明,在信关站端采用多星发送分集方案与Rake接收技术,可以有效降低系统误码率,改善系统性能。In LEO satellite mobile communication system of CDMA,there are at least two satellites over the gateway station simul-taneously.According to this feature,Rake receiver is studied by considering the channel characteristics of LEO satellite communication systems.In order to track in real time the change of the channel,a multipath combining scheme based on fast convergence LMS algorithm （FC-LMS） is proposed.The simulation results show that the multi-satellite transmits diversity and Rake receiver can be used to reduce the BER and improve the performance of system.

关 键 词：低轨卫星 Loo模型 RAKE接收 FC-LMS算法 

分 类 号：TN927[电子电信—通信与信息系统]