| 天线阵CDMA系统基于子空间的盲辩识与多用户检测 |
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| 引用本文： | 严玉平,刘泽民.天线阵CDMA系统基于子空间的盲辩识与多用户检测[J].北京邮电大学学报,2002,25(1):73-78. |
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| 作者姓名： | 严玉平 刘泽民 |
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| 作者单位： | 北京邮电大学电信工程学院,北京,100876 |
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| 摘 要： | 针对天线阵CDMA系统,运用子空间方法,导出了用户多径信道的盲辩识过程.并证明在此基础上,结合待检用户的扩频序列,在几乎不增加任何额外运算量的情况下,就可过渡到多用户检测.尽力避免了对高维矩阵的直接运算,计算量大大降低.采用天线阵方法适于过载系统(系统用户数≥处理增益).
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| 关 键 词： | 码分多址 子空间分解 盲信道辩识 多用户检测 |
| 文章编号： | 1007-5321(2002)01-0073-06 |
| 修稿时间： | 2001年4月13日 |
Blind Identification and Multiuser Detection Based on Subspace in Antenna Arrays Systems |
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| YAN Yu ping,LIU Ze min.Blind Identification and Multiuser Detection Based on Subspace in Antenna Arrays Systems[J].Journal of Beijing University of Posts and Telecommunications,2002,25(1):73-78. |
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| Authors: | YAN Yu ping LIU Ze min |
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| Abstract: | A blind identification process of each user' multipath channel using a subspace method for antenna arrays CDMA systems is presented. It is shown that based on the identified channel and combined with the knowledge of the desired user' spreading sequence, multiuser detector can be constructed in closed form, at almost no extra computational cost. Because the computing of some high dimension matrices has been avoided directly, the computation complexity becomes lower. By using antenna arrays, the proposed method can be applied to overload systems, where the number of users may exceed the processing gain. |
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| Keywords: | code division multiple access subspace decomposition blind channel identification multiuser detection |
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