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Bistatic Spotlight SAR Processing Using the Frequency-Scaling Algorithm

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4 Author(s)
Yanping Li ; Nat. Lab. of Radar Signal Process., Xidian Univ., Xi'an ; Zhenhua Zhang ; Mengdao Xing ; Zheng Bao

This letter derives the bistatic point target spectrum for the translational invariant case. Based on the derived spectrum and the linear approximation of the bistatic range cell migration factor, a bistatic frequency-scaling algorithm (FSA) is proposed for spotlight synthetic aperture radar data processing. This algorithm leads to a very precise and efficient processing since it performs the focusing in the frequency domain and no interpolation is required in the whole processing chain. In addition, it is shown that the case considered in the monostatic FSA is a specialization of the more general one considered in this letter. Finally, simulation results are provided to illustrate the validity of the presented approach.

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:5 ,  Issue: 1 )