Journal of Xidian University

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Robust registration based compensation method based on sparse recovery

LIU Yang1;ZHANG Yongshun1;LIU Hanwei1;GUO Yiduo1;LONG Zhenguo2   

  1. (1.  Air and Missile Defense College, Air Force Engineering Univ., Xi'an 710051, China;
    2. No.95100 Unit of Air Force, Guangzhou 510405, China)
  • Received:2016-12-01 Online:2017-10-20 Published:2017-11-29

Abstract:

The loss of the degree of system freedom and mismatch of prior information based on the registration based compensation (RBC) method will result in a decline in computational performance. In order to solve above problems, a robust method named SRBC is proposed where the sparse recovery method is applied instead of the sub-aperture smoothing operation. First, the SRBC utilizes the sparse recovery to get the super resolution clutter space-time spectrum. Then the transition covariance matrix is calculated. Finally, the clutter covariance matrix is reconstructed by the Capon spectrum. Compared with the traditional RBC method, the SRBC proposed does not depend on sub-aperture smoothing operation and prior information and maintains the performance of clutter range-dependence. In addition, it is also steadier when the sensor error exists. Experimental simulation demonstrates the correctness and feasibility of this method.

Key words: range dependence, registration based compensation, sub-aperture smoothing, sparse recovery