低轨卫星移动通信中扩频S-ALOHA协议吞吐性能分析  

On the Throughput Performance of Spread Spectrum S ALOHA for LEO Satellite Mobile Communication

作　　者：曹世文[1] 吴诗其[1] 李乐民[1] 

机构地区：[1]电子科技大学

出　　处：《通信学报》1997年第7期43-47,共5页Journal on Communications

基　　金：国家科委"863"高技术计划;高校博士点基金

摘　　要：由于扩频具有良好的抗多径干扰的能力，因此，在地面移动无线系统中被认为是一种较好的多址方式。但在低轨卫星移动系统中，其传播条件恶劣，各种因素对系统的吞吐性能的影响各不一样，本文分析了多径衰落，扩频增益，同步捕获等因素对吞吐性能的影响，得出了解析式。Because Spread Spectrum techniques have a good ability of anti multipath interference in the land mobile radio system, it can be regarded as one kind of better multiple access techniques in the LEO personal satellite system. Whereas the transmission enviroment is bad, the effect of various factors on throughput is quite different. This paper will analyse the effect of multipath fading、spread spectrum gain and code syncronization capture on throughput performance and the analytic formula are obtained. The numerical curves are calculated and the results are discussed.

关 键 词：低轨移动卫星 CDMA SALOHA 吞吐量 卫星移动通信 

分 类 号：TN927.2[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]