DOA Estimation of Coherent Signals Under Mutual Couple Based on Toeplitz Matrix
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摘要: 在阵列互耦误差存在的前提下,针对多组相干信号源和若干非相干信号源并存的情况,提出了一种对信号源进行准确估计的算法.算法首先估计阵列的互耦参数,并利用此互耦参数对阵列接收数据进行补偿;然后利用Toeplitz矩阵重构法对相干信号进行解相干;最后利用MUSIC算法估计各个信号源的来波方向(direction of arrival,DOA).实验结果表明,算法有效解决了互耦的影响,避免了阵列损失,实现了间距很小信源的准确估计.
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关键词:
- 互耦 /
- 相干源 /
- Toeplitz矩阵
Abstract: This paper describes the method of direction of arrival(DOA) estimation for many groups of coherent and uncorrelated sources under mutual couple based on Toeplitz matrix.The method first estimates the mutual couple parameter of the linear array,and compensates the array date using the mutual couple parameter.Then,the method decoherences the coherent sources by using Toeplitz matrix.Finally,the DOA of each source is estimated by using the MUSIC method.Experimental results show that the algorithm is effective in solving the influence of mutual coupling,avoiding the loss of array,and realizing the accurate estimation of small sources.-
Keywords:
- mutual couple /
- coherent sources /
- Toeplitz matrix
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[1] FRIEDLANDER B,WEISS A J.Direction finding using noise covariance modeling[J].IEEE Trans on Signal Processing,1995,43(7):1557-1567.
[2] KRIM H,VIBERG M.Two decades of array signal processing research[J].IEEE Signal Processing Magazine,1996,13(4):67-94.
[3] FRIEDLANDER B,WEISS A J.Direction finding in the presence of mutual coupling[J].IEEE Trans on AP,1991,39(33):273-284.
[4] 王布宏,王永良,陈辉.均匀线阵互耦条件下的鲁棒DOA估计及互耦自校正[J].中国科学:E辑,2004,34(2):229-235.WANG Bu-hong,WANG Yong-liang,CHEN Hui.DOA Estimation and self-correction with uniform linear under mutual coupling[J].China Science:E,2004,34(2):229-235.(in Chinese) [5] SELLONE F,SERRA A.A novel online mutual coupling compensation algorithm for uniform and linear arrays[J].IEEE Trans on Signal Processing,2007,55(2):560-573.
[6] PILLAI S U,KWON B H.Forward-backward spatial smoothing techniques for coherent signal identification[J].IEEE Trans on ASSP,1989,37(1):8-15.
[7] DI A,TAIN L.Matrix Decomposition and multiple sources location[C]∥IEEE International Conference on Acoustics,Speech and Signal Processing.New York:IEEE,1984,33:1-4.
[8] BAI Jun,SHEN Xiao-hong,WANG Hai-yan,et al.Improved Toeplitz algorithms to coherent sources DOA estimation[C]∥International Conference on Measuring Technology and Mechatronics Automation.Piscataway:IEEE Computer Society,2010:442-445.
[9] XU Xu,YE Zhong-fu,ZHANG Yu-feng.DOA estimation for mixed signals in the presence of mutual coupling[J].IEEE Trans on Signal Processing,2009,57(9):3523-3532.
[10] LIAO B,CHAN S C.DOA estimation of coherent signals for uniform linear arrays with mutual coupling[C]∥IEEE International Symposium on Grcuits and Systems.Piscataway:IEEE,2011:377-380.
[11] 谭親林.互耦误差条件下的阵列信号参数估计研究[D].成都:西南交通大学信息科学与技术学院,2010.TAN Qin-lin.Study of paramenter estimation of array signal under mutual couple condition[D].Chengdu:School of Information Science&Engineering,Southwest Jiaotong University,2010.(in Chinese) [12] 廖斌.阵列校正与非均匀噪声环境下DOA估计方法研究[D].西安:西安电子科技大学电子工程学院,2009.LIAO Bin.Study of array calibration and doa estimation in nonunform noise[D].Xi'an:School of Electronic & Engineering,Xi'an University of Electronic Science and Technology,2009.(in Chinese) [13] 张江利.相干信源DOA估计算法研究[D].成都:西南交通大学信息科学与技术学院,2006.ZHANG Jiang-li.Study on the DOA estimation algorithm for coherent signals[D].Chengdu:School of Information Science & Engineering,Southwest Jiaotong University,2006.(in Chinese)
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