A novel implementation of the polar format algorithm (PFA) using the principle of chirp scaling (PCS) for spotlight synthetic aperture radar (SAR) image formation is addressed. A PFA completely free of interpolation has been achieved in moderate squinted imaging geometry. The presented approach consists of the range and azimuth scaling of the polar samples, in which only fast Fourier transforms (FFTs) and complex vector multiplications are involved. Following different processing chains, the dechirped and the chirped SAR signals are treated separately in this paper. Relative to the classic polyphase filter that uses the long sinc kernel, the new solution is able to attain a comparable result, but is much quicker by exploiting inherent properties of the linear frequency modulated (LFM) signal. Point target simulation has validated the presented methodology.
Polar format agorithm using chirp scaling for spotlight SAR image formation
IEEE Transactions on Aerospace and Electronic Systems ; 44 , 4 ; 1433-1448
2008-10-01
3557190 byte
Article (Journal)
Electronic Resource
English
Polar Format Algorithm using Chirp Scaling for Spotlight SAR Image Formation
Online Contents | 2008
|Extended Chirp Scaling Algorithm for Spotlight SAR
British Library Online Contents | 2002
|British Library Online Contents | 2014
|