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Vol. 166, Issue 3, March 2014, pp. 203-212

 

Bullet

 

Passive ISAR Imaging Using Multi-channel DVB-T Signals
 

Kaiwang Lu, Jie Yang, Xiaoqing Qi and Liangjun Zhang

Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Ministry of Education, Wuhan, 430070, China
Tel.: 86-027-87290336

E-mail: xminforever@163.com

 

 

Received: 20 December 2013 /Accepted: 28 February 2014 /Published: 31 March 2014

Digital Sensors and Sensor Sysstems

 

Abstract: This paper analysis the characteristics and ambiguity function of the single-channel and multi-channel DVB-T signals, and choose the multi-channel DVB-T signal as opportunity illuminators to do the research of ISAR imaging. Firstly, the target’s echo using single-in-multi-out mode for passive ISAR image is derived, together with the analysis of the composition of the echo’s spatial spectrum. Considering the characteristic of the imaging model, PR-CLEAN method is given, which uses the CLEAN algorithm to extract the scatters from every received echoes after the Polar Reformatting algorithm is processed. The PR-CLEAN method can get better performance for noise suppression which caused by the Polar Reformatting algorithm, and improve imaging quality. Simulation results agree well with the theoretical analysis, and PR-CLEAN method is proved to be a good method for ISAR imaging in single-in-multi-out mode based on the multi-channel DVB-T signals.

 

Keywords: Multi-channel DVB-T, Polar reformatting algorithm, CLEAN algorithm, passive, ISAR.

 

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