He Jin, Liu Zhong. Spatial-Ambiguity-Domain based DOA Estimation Algorithm Using Fractional Lower Order Statistics[J]. Journal of Electronics & Information Technology, 2007, 29(1): 109-112. doi: 10.3724/SP.J.1146.2005.00529
Citation:
He Jin, Liu Zhong. Spatial-Ambiguity-Domain based DOA Estimation Algorithm Using Fractional Lower Order Statistics[J]. Journal of Electronics & Information Technology, 2007, 29(1): 109-112. doi: 10.3724/SP.J.1146.2005.00529
He Jin, Liu Zhong. Spatial-Ambiguity-Domain based DOA Estimation Algorithm Using Fractional Lower Order Statistics[J]. Journal of Electronics & Information Technology, 2007, 29(1): 109-112. doi: 10.3724/SP.J.1146.2005.00529
Citation:
He Jin, Liu Zhong. Spatial-Ambiguity-Domain based DOA Estimation Algorithm Using Fractional Lower Order Statistics[J]. Journal of Electronics & Information Technology, 2007, 29(1): 109-112. doi: 10.3724/SP.J.1146.2005.00529
In this paper, a DOA estimation algorithm for non-stationary signals embedded in impulsive SS noise environments is proposed. Firstly, a Spatial Ambiguity Function based on the Fractional Lower Order Statistics (FLOS-SAF) is defined to separate signals by exploiting the ambiguity domain characteristic. Then the average of ambiguity-domain points is carefully selected to perform the subspace analysis. Finally the MUSIC algorithm is applied to obtain DOA estimates. Comparison with the spatial processing method using fractional lower order statistics, the proposed algorithm provides more precise DOA estimates by using the ambiguity domain information of signals. Computer simulation results show the effectiveness of the algorithm.
[1] Krim H and Viberg M. Two decades of array signal processing research: The parametric approach[J].IEEE Signal Processing Mag.1996, 13(4):67- [2] Shao M and Nikias C L. Signal Processing with Alpha-Stable Distributions and Applications. New York: Wiley, 1995, Chap. 2-5. [3] Tsakalides P and Nikias C L.Maximum likelihood localization of sources in noise modeled as a stable process[J].IEEE trans on SP.1995, 43(11):2700- [4] Tsakalides P and Nikias C L. The robust covariation-based MUSIC(ROC-MUSIC) algorithm for bearing estimation in impulsive noise environments[J].IEEE Trans. on SP.1996, 44(7):1623- [5] Liu T H and Mendel J M. A subspace-based direction finding algorithm using fractional lower order statistics[J].IEEE Trans. on SP.2001,49(8):1605- [6] 吕泽均,肖先赐. 基于分数阶矩的测向方法研究.电波科学学报,2002,17(6): 561-564. Lu Zejun and Xiao Xianci. A new direction finding algorithm based on fractional order moment. Chinese Journal of Radio Science, 2002, 17(6): 561-564. [7] Belouchrani A and Amin M G.Time-frequency MUSIC[J].IEEE SP Letters.1999, 6(5):109- [8] Zhang Y, Mu M, and Amin M G. Time-frequency maximum likelihood methods for direction finding[J].J. Franklin Inst.2000, 337(4):483- [9] Hassanien A, Belouchrani A,and Amin M G.Time-frequency ESPRIT for direction-of-arrival estimation of chirp signals. Sensor Array and Multichannel Signal Processing Workshop Proceedings, Rosslyn, VA, USA, 2002: 337-341. [10] Shao M and Nikias C L. Signal processing with fractional low order moments: Stable processes and their application[J].Proc. IEEE.1993, 81(7):986- [11] 张贤达, 保铮. 非平稳信号分析与处理.北京:国防工业出版社, 1998, 第2章. [12] Tsihrintzis G A and Nikas C L.Fast estimation of the parameters of alpha-stable impulsive interference. IEEE Trans. on SP, 1996: 44(6): 1492-1503. [13] Schmidt R O. Multiple emitter location and signal parameter estimation. IEEE Trans. on AP, 1986, 34: 276-280.