Title :
A novel spectrum reconstruction algorithm based on FrFT for multiple azimuth beam SAR
Author :
Zhou, BaoLiang ; Zhang, Shunsheng ; Zhang, Wei ; Dai, Chunyang ; Kong, LingKun
Author_Institution :
Res. Inst. of Electron. Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, we consider the problems of reconstructing the spectrum based on Fractional Fourier Transform (FrFT) from periodic non-uniformly sampled signal in multiple azimuth beams SAR system. First, based on the theory of the paired echoes, the influence of periodic non-uniform sampling for SAR imaging has been derived. Second, signal model of non-uniformly sampling in azimuth direction has been established. Finally, detailed analysis of spectrum reconstruction algorithm in the fractional Fourier domain has been performed. In addition, the simulations are carried out to verify the correctness of the results.
Keywords :
Fourier transforms; image sampling; radar imaging; synthetic aperture radar; SAR imaging; azimuth beam SAR; azimuth direction; fractional Fourier transform; nonuniformly sampling; paired echoes theory; spectrum reconstruction algorithm; Azimuth; Fourier transforms; Image reconstruction; Optical sensors; Optical transmitters; Reconstruction algorithms; Sampling methods; Signal processing algorithms; Spatial resolution; Surveillance; FrFT; multiple azimuth beam; spectrum reconstruction; synthetic aperture radar;
Conference_Titel :
Information and Automation (ICIA), 2010 IEEE International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-5701-4
DOI :
10.1109/ICINFA.2010.5512126
