Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (12): 2618-2622.doi: 10.3969/j.issn.1001-506X.2011.12.10

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Real-time imaging algorithm for squint SAR based on SPECAN processing and its implementation in FPGA

LI Xue-shi, LIANG Yi, LI Bei-lei, XING Meng-dao, ZHANG Kang   

  1. National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
  • Online:2011-12-19 Published:2010-01-03

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Abstract:

Due to a wide application of squint synthetic aperture radar (SAR), a real-time imaging algorithm of squint SAR based on SPECAN processing is firstly presented, which is characterized by its small amount of computation and convenient operation. To cope with the sector distortion of SPECAN processing, a Sinc interpolation approach removing the varying of azimuth sampling grid distance is proposed. Based on the aforementioned, real-time programming of field programmable gate arrays (FPGA) implemented, emphasizing on the design of Sinc interpolation based on the spatial filtering approach. The good experimental images validate the effectiveness of this algorithm and the feasibility of implementation in FPGA.

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