| 基于抵消干扰信号相关阵的DOA估计 |
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| 引用本文： | 王维新,吴镇扬,彭岳星,刘陈.基于抵消干扰信号相关阵的DOA估计[J].东南大学学报(自然科学版),2004,34(3):301-304. |
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| 作者姓名： | 王维新 吴镇扬 彭岳星 刘陈 |
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| 作者单位： | 东南大学无线电工程系,南京,210096 |
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| 基金项目： | 国家高技术研究发展计划 (863计划 )资助项目(2 0 0 1AA12 3 0 15 ) |
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| 摘 要： | 讨论了异步直接序列码分多址(DS-CDMA)系统中多用户环境下的波达方向(DOA)估计问题，针对路径总数大干天线阵元数这一问题，提出了一种有效的DOA估计模式．通过抵消干扰信号的相关阵，可方便地提取出感兴趣信息；此时，采用传统的DOA估计算法即可逐次估计出各DOA信息．为改善系统性能，本文提出了2种改进措施：Mahalanobis变换法及矩阵点除算法．前者能够大幅度地提高估计精度，而后者则可避免特征值分解运算，大大降低算法复杂度．仿真实验验证了算法的有效性．
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| 关 键 词： | 波达方向估计 智能天线 空时信号处理 |
| 文章编号： | 1001-0505(2004)03-0301-04 |
DOA estimation based on counteraction of interferences' correlation matrices |
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| Wang Weixin Wu Zhenyang Peng Yuexing Liu Chen.DOA estimation based on counteraction of interferences'''' correlation matrices[J].Journal of Southeast University(Natural Science Edition),2004,34(3):301-304. |
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| Authors: | Wang Weixin Wu Zhenyang Peng Yuexing Liu Chen |
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| Abstract: | The DOA (direction of arrival) estimation for asynchronous DS-CDMA (direct sequence code division multiple access) systems in multi-user environments is discussed. An effective DOA estimation pattern is presented for the situation that the number of all the paths exceeds that of antenna array's elements. Based on the counteraction of the correlation matrices of interferences,signals of interest (SOI) are conveniently extracted. In the meantime,DOA's of each path can be resolved serially from the SOI using the conventional DOA estimation algorithms. Furthermore,two scenarios - Mahalanobis transform and element-wise division algorithm,which improve the system performances,are provided. The former improves the estimation accuracy and the latter decreases the complexity as eigenvalue decomposition can be avoided. Simulation results confirm the effectiveness of the algorithm. |
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| Keywords: | DOA estimation smart antenna space-time signal processing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
