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A New Method of Deriving Spectrum for Bistatic SAR Processing

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2 Author(s)
Fang Wang ; Nat. Univ. of Defense Technol., Changsha, China ; Xiang Li

The formulation of a point target spectrum is a key step in deriving synthetic aperture radar focusing algorithms, which exploits the processing efficiency of the frequency domain. However, the existence of a double-square root in the bistatic range equation makes it difficult to find an exact analytical solution for the 2-D spectrum. In this letter, according to the idea of function optimal approach, we derive a new 2-D point target spectrum on the basis of Legendre polynomial expansion, which is more exact than the existing spectra during the synthetic aperture time.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:7 ,  Issue: 3 )