| 基于四阶累积量和时间平滑的相干信号DOA估计 |
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| 引用本文： | 景小荣,隋伟伟,周围. 基于四阶累积量和时间平滑的相干信号DOA估计[J]. 系统工程与电子技术, 2012, 34(4): 789-794. DOI: 10.3969/j.issn.1001-506X.2012.04.27 |
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| 作者姓名： | 景小荣 隋伟伟 周围 |
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| 作者单位： | 1. 重庆邮电大学通信与信息工程学院，重庆 400065；2. 移动通信技术重庆市重点实验室, 重庆 400065；3. 重庆邮电大学光电工程学院，重庆 400065 |
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| 基金项目： | 国家高技术研究发展计划(863计划)重点项目(2009AA011302);重庆市自然科学基金(2010BB2417);重庆市教委科研项目(KJ090513,KJ110526)资助课题 |
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| 摘 要： | 高斯色噪声背景下，针对多径环境下的多用户波达方向（direction of arrival, DOA）估计问题，提出一种联合处理算法。新算法首先利用四阶累积量估计出各个用户的空间特征，然后利用基于时间平滑的多重信号分类 (multiple signal classification，MUSIC)算法实现各用户多径信号的DOA估计。该算法突破了传统空间平滑类算法的局限，对于M元均匀线阵，新算法最多可估计M×(M－1)个DOA，且各DOA与各用户可自动实现配对。计算机仿真结果验证了算法的有效性。
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| 关 键 词： | 阵列信号处理 波达方向估计 高阶累积量 时间平滑 |
DOA estimation of coherent signals based on fourth-order cumulant and temporal smoothing |
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| JING Xiao-rong , SUI Wei-wei , ZHOU Wei. DOA estimation of coherent signals based on fourth-order cumulant and temporal smoothing[J]. System Engineering and Electronics, 2012, 34(4): 789-794. DOI: 10.3969/j.issn.1001-506X.2012.04.27 |
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| Authors: | JING Xiao-rong SUI Wei-wei ZHOU Wei |
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| Affiliation: | 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065， China; 2. Chongqing Key Lab of Mobile Communications Technology，Chongqing 400065，China; 3. College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065， China |
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| Abstract: | A combined algorithm is proposed to estimate the direction of arrivals(DOAs) of multi-path signals for multi-users in colored Gaussian noise channels.In this algorithm,the spatial signature of each user is firstly estimated by the fourth-order cumulant.Then the multiple signal classification(MUSIC) algorithm based on temporal smoothing is adopted to estimate the DOAs of the multi-path signals of each user.It can break through the limit of the traditional spatial smoothing liked algorithms.For a uniform linear array with M elements,the new algorithm can estimate M×(M-1) DOAs and each DOA can automatically match with its user.The result of computer simulations confirms the effectiveness of the combined algorithm. |
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| Keywords: | array signal processing direction of arrival(DOA) estimation high order cumulant temporal smoothing |
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