| OPASTd子空间跟踪算法及其在盲多用户检测系统中的应用 |
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| 引用本文： | 王星,李小文.OPASTd子空间跟踪算法及其在盲多用户检测系统中的应用[J].重庆邮电学院学报(自然科学版),2009(1). |
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| 作者姓名： | 王星 李小文 |
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| 作者单位： | 重庆邮电大学通信与信息工程学院;重庆重邮信科（集团）股份有限公司3G研究院; |
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| 基金项目： | 科技型中小企业技术创新基金(04C26215111366) |
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| 摘 要： | 为了提高基于子空间的盲多用户检测方法的性能,在简要介绍了现有的跟踪向量序列的主要子空间和特征元素的快速算法的基础上,提出了正交压缩近似投影子空间跟踪算法(OPASTd),该算法在应用压缩技术的同时,保证了每次迭代估计出的信号子空间的正交性。将该算法应用于多用户检测系统时,系统的抗多址干扰(MAI)和抗远近效应的能力和其他算法相比都有所提高,特别是在抗远近效应方面提高较大。
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| 关 键 词： | 子空间跟踪 盲多用户检测 多址干扰 远近效应 |
OPASTd algorithm and its application in blind multi-user detection system |
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| WANG Xing,LI Xiao-wen.OPASTd algorithm and its application in blind multi-user detection system[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2009(1). |
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| Authors: | WANG Xing LI Xiao-wen |
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| Institution: | 1.College of Communication and Information Engineering;Chongqing University of Posts and Telecommunications;Chongqing 400065;P.R.China;2.3G Research Institute;Chongqing Chongyou Information Technology Co.;LTD.;P.R.China |
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| Abstract: | For improving the performance of blind multi-user detection,the existing algorithms for fast tracking of principal subspace and principal components of a vector sequence were introduced.Then,the orthonormal projection approximation and subspace tracking of deflation(OPASTd)algorithm which uses deflation technique was presented.This algorithm guarantees the orthonormality of the signal subspace at each iteration.When it was applied in a multi-user detection system,the resistance to MAI and near-far effect wa... |
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| Keywords: | subspace tracking blind multi-user detection MAI near-far effect |
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