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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2014, Vol. 35 ›› Issue (3): 821-827.doi: 10.7527/S1000-6893.2013.0461

• Electronics and Control • Previous Articles     Next Articles

Direction of Arrival Estimation Method of Non-circular Signals via Sparse Bayesian Reconstruction

LIU Zhangmeng1,2, ZHOU Yiyu2, WU Haibin3   

  1. 1. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, Luoyang 471003, China;
    2. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    3. Guilin Military Representative Bureau, The 4th Department of PLA General Staff Headquarters, Guilin 541001, China
  • Received:2013-04-27 Revised:2013-11-05 Online:2014-03-25 Published:2013-11-29
  • Supported by:

    National Natural Science Foundation of China (61302141); Director Foundation of CEMEE (CEMEE2014Z0202B)

Abstract:

The performance of the subspace-based direction of arrival (DOA) estimation methods can be improved significantly via effective exploitation of the non-circularity of the incident signals, but the shortcomings of these methods in adaptation to demanding scenarios, such as low signal-to-noise ratio (SNR) and limited snapshots, can hardly be made up. The sparse Bayesian learning (SBL) technique is introduced in this paper to deal with the DOA estimation problem of non-circular signals. The spatial sparsity of the incident signals is exploited together with their non-circularity property, and the covariance and conjugate covariance matrices of the array outputs of non-circular signals are decomposed jointly under a sparsity constraint to reconstruct the spatial spectrum of the incident signals, and the DOA estimates are finally obtained according to the spectrum peak locations. This method is robust against inter-signal correlation, and its superiorities in adaptation to demanding scenarios as well as in DOA estimation precision are demonstrated by the simulation results.

Key words: array processing, direction of arrival estimation, non-circular signal, sparse Bayesian learning, joint sparse reconstruction, coherent signal

CLC Number: