Computer Science ›› 2019, Vol. 46 ›› Issue (11A): 376-380.

• Network & Communication • Previous Articles     Next Articles

Accurate and Robust Algorithm for Broadband Signal DOA Estimation

XU Zheng-qin1,2, WU Shi-qian1,2, LIU Qing-yu2   

  1. (Hubei Collaborative Innovation Center for Advanced Steels,Wuhan University of Science and Technology,Wuhan 430081,China)1;
    (School of Machinery and Automation,Wuhan University of Science and Technology,Wuhan 430081,China)2
  • Online:2019-11-10 Published:2019-11-20

Abstract: The Direction of Arrive (DOA) information of the source plays an important role in many practical applications.Therefore,it is a research hotspot to estimate the DOA accurately in the field of array signal processing.In view of the low accuracy of the traditional ISM(Incoherent Signals-subspace Method) for DOA estimation of broadband signals in a low SNR and reverberation condition,this paper presented an improved DOA estimation algorithm based on the ISM.Firstly,the wideband signal is decomposed into several sub-bands by discrete Fourier transform.Secondly,a way to construct an energy threshold is proposed by which the sub-band is filtered by the energy threshold and the sub-band with energy above the threshold is reserved.Thirdly,a covariance matrix reconstruction method is used to reconstruct the covariance matrix of each sub-band,and the DOA parameters of each sub-band are estimated by the TLS-ESPRIT algorithm.Finally,a weighting strategy is proposed to process the DOA estimates of multiple sub-bands and the final DOA is estimate accurately.The experimental results show that the proposed algorithm can effectively improve the accuracy of broadband signal DOA and has better robustness.

Key words: Broadband signal, Direction of arrival estimate, Energy threshold, Energy weighted, Incoherent signals-subspace method, Reconstruct the covariance matrix

CLC Number: 

  • TN911.72
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