J4 ›› 2014, Vol. 41 ›› Issue (3): 20-25.doi: 10.3969/j.issn.1001-2400.2014.03.004

• Original Articles • Previous Articles     Next Articles

New detection method for extended targets using sparse representation

ZHANG Xiaowei;LI Ming;ZUO Lei   

  1. (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2013-03-06 Online:2014-06-20 Published:2014-07-10
  • Contact: ZHANG Xiaowei E-mail:xwzhang@stu.xidian.edu.cn

Abstract:

The problem of detecting extended targets embedded in the Gaussian noise is considered. The Sinc basis is introduced to sparsely represent the high resolution range profile (HRRP) of extended targets. Bringing the sparse representation theory into the target detection, a new method is proposed to solve the problem by the adaptive subspace detector (ASD) based on Sinc basis. Firstly, the noise power is estimated by basis pursuit (BP), then the basis pursuit de-noising (BPDN) is used to estimate the noise covariance by the residues and finally, the ASD of the first order Gaussian model realizes the extended target detection. Experimental results based on the raw data measured by the wideband radar show that the Sinc basis can sparsely represent HRRPs very well and that the proposed method can effectively realize the extended target detection.

Key words: basis pursuit de-nosing, Sinc basis, subspace detector, sparse representation