吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 268-273.doi: 10.13229/j.cnki.jdxbgxb201701039

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Spatial smoothing technique for coherent signal DOA estimation based on eigen space MUSIC algorithm

SHI Yao-wu1, CHEN Miao1, SHAN Ze-tao2, SHI Yi-ran1, SHAN Ze-biao1, 3   

  1. 1.College of Communication Engineering, Jilin University, Changchun 130022, China;
    2.Nuobo Rubber Production Co., Ltd., Baoding 072550,China;
    3.School of Electronic and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2015-09-09 Online:2017-01-20 Published:2017-01-20

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Abstract: To estimate the Direction of Arrival (DOA) of coherent signals accurately and quickly, a new decorrelation method based on spatial smoothing technique and eigen space multiple signal classification (MUSIC) is presented. After spatial smoothing of the coherent signals, the eigen space MUSIC algorithm is applied to estimate the DOA in order to make maximal use of the information of signal and noise subspaces. In addition, the DOA estimation of uncorrelated signals is not affected, as well as the power of signal sources can be estimated effectively, which can improve the probability of success in the estimation of low power signals. The proposed method possesses a better resolving ability and a lower SHR threshold than conventional spatial smoothing technique and modified MUSIC algorithm for DOA estimation of coherent signals. The simulation results demonstrate that the proposed method is effective and robust in DOA estimation.

Key words: information processing, direction of arrival(DOA) estimation, coherent signal, eigen space, spatial smoothing technique, signal source power estimation

CLC Number: 

  • TN911
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