| 一种增强的GEO卫星CDMA通信系统随机接入方式 |
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| 引用本文： | 张丙杰,胡捍英,王大鸣.一种增强的GEO卫星CDMA通信系统随机接入方式[J].电路与系统学报,2010,15(5). |
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| 作者姓名： | 张丙杰 胡捍英 王大鸣 |
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| 作者单位： | 解放军信息工程大学,信息工程学院,河南,郑州,450002 |
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| 基金项目： | "十一五"国家863计划重大专项，国家重点项目 |
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| 摘 要： | 本文提出了一种适用于GEO卫星CDMA移动通信系统的随机接入方式。该方式参考了S-UMTS中的随机接入方式设计,扩展了其接入帧和接入时隙的长度,并提出了一种新颖的用户随机接入请求的发送策略。通过接入时隙长度的扩展,增大了接入前缀码的个数和前缀的长度,提高了接入消息的扩频增益,从而提高了用户接入的首次捕获概率和接入消息的正确解码概率,降低用户的接入功率,并有效削弱功率攀升问题给系统容量造成的影响。增加了保护间隔的长度,以应对GEO卫星环境下用户之间接入的大时延差问题。本文提出的用户随机接入请求发送策略,有效改善了用户的接入时间性能。
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| 关 键 词： | 接入帧 接入时隙 前缀码 |
A new random access method for GEO satellite CDMA communication system |
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| ZHANG Bing-jie,HU Han-ying,Wang Da-ming.A new random access method for GEO satellite CDMA communication system[J].Journal of Circuits and Systems,2010,15(5). |
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| Authors: | ZHANG Bing-jie HU Han-ying Wang Da-ming |
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| Affiliation: | ZHANG Bing-jie,HU Han-ying,Wang Da-ming ( Institute of Information Engineering,PLA Information Engineering University,Zhengzhou 450002,China ) |
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| Abstract: | It is well known that random access method plays a key role in GEO satellite CDMA communication system, which dominates the performance of access request for users. In this paper, a new random access method is discussed, which can be used in GEO satellite communication system and others characterized long transmission delay. Based on the random access design in S-UMTS system, a new structure of access frame and slots is proposed and a new procedure of transmitting access request corresponding to the new str... |
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| Keywords: | CDMA ALOHA S-UMTS |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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