Open AccessAn imaging algorithm for missile-borne spotlight SAR based on subband compensation
Author(s) -
Han Jiang,
Min Han,
Huichang Zhao,
Shuning Zhang
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.198404
Subject(s) - missile , computer science , synthetic aperture radar , algorithm , compensation (psychology) , computation , nonlinear system , chirp , missile guidance , scaling , motion compensation , radar imaging , radar , computer vision , optics , telecommunications , physics , mathematics , laser , aerospace engineering , engineering , psychology , geometry , quantum mechanics , psychoanalysis
The missile-borne synthetic aperture radar (SAR) often use nonlinear scaling algorithm to improve the focusing effect. However, the nonlinear scaling algorithm cannot be used in missile-borne spotlight SAR because of its own limitations. Aiming at this problem, this paper first puts forward a new method named “sub-band compensation” and combineds it to the missile-borne SAR spotlight imaging algorithm. This new algorithm does not introduce the three phases of operation, so the Doppler frequency rate can be effectively compensated under low PRF. Simulation results and analysis show that compared with the nonlinear chirp scaling algorithm, the proposed one has advantages in computation, results obtained, and applicability.