| 引用本文: | 张传胜,王跃科,杨俊,等.低轨移动卫星异步多用户检测算法.[J].国防科技大学学报,2006,28(2):88-92.[点击复制] |
| ZHANG Chuansheng,WANG Yueke,YANG Jun,et al.Asynchronous Multiuser Detection Algorithm for LEO Mobile Satellite Receiver[J].Journal of National University of Defense Technology,2006,28(2):88-92[点击复制] |
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| 低轨移动卫星异步多用户检测算法 |
| 张传胜, 王跃科, 杨俊, 邢克飞 |
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(国防科技大学 机电工程与自动化学院，湖南 长沙 410073)
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| 摘要: |
| 介绍了一种适合在低轨(LEO)星载接收机上运行、低复杂度的异步CDMA多用户检测算法，能够有效对抗强多用户干扰和大多普勒频移。基带信号通过码片滤波后以码速率采样信号作为观测信号，然后利用Kalman滤波算法对各个用户信号进行分离。状态方程综合考虑了多普勒频移、定时误差。该算法能够抵抗高达35dB的远近效应，并且对频率和定时误差不敏感。 |
| 关键词: 多用户检测 码片滤波 移动卫星通讯 Kalman滤波 多普勒频移 |
| DOI： |
| 投稿日期：2005-11-28 |
| 基金项目:国家部委资助项目(C1320063102) |
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| Asynchronous Multiuser Detection Algorithm for LEO Mobile Satellite Receiver |
| ZHANG Chuansheng, WANG Yueke, YANG Jun, XING Kefei |
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(College of Mechatronics Engineering and Automation,National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A low complexity asynchronous multiuser detection algorithm for on board LEO satellite receiver, which can resist strong multiuser interference and large doppler frequency drift is introduced. After chip match filter, base band signal was sampled at chip rate and used as observe signal. Then Kalman filter was used to separate multi-user signal. Doppler frequency drift and timing error were considered in state transform equations. The proposed algorithm can resist as high as 35dB near-far effect, and are senseless to frequency and timing error. |
| Keywords: multiuser detection chip filter mobile satellite communication Kalman filter Doppler frequency drift |
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