Volume 6 Issue 4
Sep.  2017
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Article Navigation >  Journal of Radars  > 2017  >  6(4): 388-396
FANG Linlin, ZHOU Chao, WANG Rui, et al. RCS feature-aided insect target tracking algorithm[J]. Journal of Radars, 2019, 8(5): 598–605. doi: 10.12000/JR19067
Citation: Lin Yuchuan, Zhang Jianyun, Wu Yongjun, Zhou Qingsong. Matrix Inversion Method for Azimuth Reconstruction in Bistatic Spaceborne High-Resolution Wide-Swath SAR System[J]. Journal of Radars, 2017, 6(4): 388-396. doi: 10.12000/JR17060
shu

Matrix Inversion Method for Azimuth Reconstruction in Bistatic Spaceborne High-Resolution Wide-Swath SAR System

DOI: 10.12000/JR17060

  • Electronic Engineering Institute, Hefei 230037, China

Funds:  Anhui Province Natural Science Foundation (1508085MF119)
  • Received Date: 2017-06-18
  • Rev Recd Date: 2017-08-23
  • Publish Date: 2017-08-28
    Abstract
  • In bistatic spaceborne High-Resolution Wide-Swath SAR systems (HRWS-SAR), the azimuth reconstruction to obtain a uniform sampling signal or Doppler spectrum is a crucial step in image processing because azimuth signals are generally of non-uniform sampling type. In this study, the variant transmitting distance to receiving distance radio is approximated to be a constant, the equivalence between the bistatic and monostatic SAR azimuth interchannel transfer functions is deduced, and the azimuth signal model in spaceborne HRWS-SAR with general bistatic configuration is established. Furthermore, the matrix inversion algorithm to reconstruct the azimuth signal is proposed; in addition, to measure the reconstruction performance, the formulae for the signal noise ratio scaling factor and the azimuth ambiguity signal ratio are provided. The azimuth reconstruction is simulated in several spaceborne HRWS-SAR systems with typical bistatic configuration, and the results show that the azimuth Doppler spectrum can be correctly reconstructed via the matrix inversion algorithm when the azimuth sampling is conducted without coinciding samples.

     

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