| 异步DS-CDMA系统中基于矩阵点除算法的DOA估计 |
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| 引用本文： | 王维新,吴镇扬,彭岳星,刘陈.异步DS-CDMA系统中基于矩阵点除算法的DOA估计[J].信号处理,2004,20(5):470-474. |
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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863计划(No.2001AA123015)资助项目 |
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| 摘 要： | 针对异步DS-CDMA系统中的多用户环境,本文提出了一种低复杂度的DOA估计算法——矩阵点除算法。该算法通过对感兴趣信息的逐次分离,实现了DOA的逐路径估计。算法具有两方面显著优势:(1)克服了传统的DOA估计算法在路径总数大于天线阵元数时不能工作这一缺陷:(2)避免了计算复杂的特征值分解运算,大大降低了算法复杂度。仿真实验验证了算法的有效性。
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| 关 键 词： | DOA估计 智能天线 空时信号处理 |
| 修稿时间： | 2003年6月23日 |
DOA Estimation Based on Element-Wise Division Algorithm for Asynchronous DS-CDMA Systems |
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| Wang Weixin Wu Zhenyang Peng Yuexing Liu Chen.DOA Estimation Based on Element-Wise Division Algorithm for Asynchronous DS-CDMA Systems[J].Signal Processing,2004,20(5):470-474. |
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| Authors: | Wang Weixin Wu Zhenyang Peng Yuexing Liu Chen |
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| Abstract: | In this paper, a low complexity DOA estimation algorithm, called element-wise division algorithm, is presented for asynchronous DS-CDMA systems under multi-user environment. Based on the separation of signals of interested serially, DO As of each path are resolved accordingly. This algorithm has two primary advantages: (1) it overcomes the limitation that the number of all the paths exceeds that of antenna array's elements, which makes the conventional DOA algorithms invalid. (2) there's no need to calculate eigenvalue decomposition, hence, the complexity is decreased dramatically. Simulation results confirm the effectiveness of the algorithm. |
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| Keywords: | DOA estimation smart antenna space-time processing |
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