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2014, 04, v.44;No.299 62-66
基于多星分集的Rake接收性能研究
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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。

Abstract:

In LEO satellite mobile communication system of CDMA,there are at least two satellites over the gateway station simultaneously. 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.

参考文献

[1]张更新,张杭.卫星移动通信系统[M].北京:人民邮电出版社,2001.

[2]赵国栋,陈晓挺.低轨道卫星信道特性及高路径解析度Rake接收[J].上海航天,2009(5):52-55.

[3]LOO C.A Statistical Mode1 for a Land Mobi1e Sate11ite Link[J].IEEE Trans On Vehic Tech,1985,34(3):122-127.

[4]LOO C.Measurements and Models of a Land Mobile Satellite Channel and Theirapp1ications to MSK Signa1s[J].IEEE Trans on Vehic Tech,1987,36(3):114-121.

[5]LOO C.Digita1 Transmission Through a Land Mobile Satellite Channel[J].IEEE Trans on Commun,1990,8(5):693-697.

[6]何龙科.低轨卫星星座CDMA移动通信信道衰落对抗技术研究[D].中国科学院研究生院(上海微系统与信息技术研究所),2004:66-75.

[7]张更新,李罡,于永.全球星系统概况[J].数字通信世界,2007(12):83-85.

[8]张东明.RAKE接收技术在CDMA系统中的应用与研究[D].西安:西安电子科技大学,2010:19-22.

[9]谷源涛.LMS算法收敛性能研究及应用[D].北京:清华大学,2003:11-12.

[10]李庆扬,关治,白峰杉.数值计算原理[M].北京:清华大学出版社,2000:322-328.

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中图分类号:TN927.23

引用信息:

[1]于开勇.基于多星分集的Rake接收性能研究[J].无线电工程,2014,44(04):62-66.

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