Journal of Xidian University ›› 2020, Vol. 47 ›› Issue (2): 91-97.doi: 10.19665/j.issn1001-2400.2020.02.013

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Fast DOA estimation methods for underdetermined wideband signals with a high accuracy

JIANG Ying1,FENG Mingyue1,XU Qi2,HE Yi3()   

  1. 1.Air Force Early Warning Academy, Wuhan 430019, China
    2.Unit 94654 of the PLA, Nanjing 211800, China
    3.Naval Research Academy, Beijing 100161, China
  • Received:2019-10-31 Online:2020-04-20 Published:2020-04-26
  • Contact: Yi HE


In order to handle the low accuracy of the algorithm DCS-SOMP, two underdetermined wideband direction of arrival estimation methods with a high accuracy are proposed from the perspective of multiple iteration. First, the wideband signal processing model using the sparse array is established and transformed into a distributed compressive sensing problem through sparse representation. Then, the noises are eliminated through matrix transformation. After that, an algorithm utilizing proximity searching is proposed to improve the estimation accuracy and an algorithm based on the refined grid is proposed to compensate grid mismatch. Simulation results show that the proposed algorithms outperform the DCS-SOMP with a higher estimation accuracy and possess the advantage in computational speed.

Key words: direction of arrival, degrees of freedom, high accuracy, sparse array, wideband signal

CLC Number: 

  • TN971