Share Email Print
cover

Journal of Applied Remote Sensing • Open Access

Higher order nonlinear chirp scaling algorithm for medium Earth orbit synthetic aperture radar
Author(s): Pengbo Wang; Wei Liu; Jie Chen; Wei Yang; Yu Han

Paper Abstract

Due to the larger orbital arc and longer synthetic aperture time in medium Earth orbit (MEO) synthetic aperture radar (SAR), it is difficult for conventional SAR imaging algorithms to achieve a good imaging result. An improved higher order nonlinear chirp scaling (NLCS) algorithm is presented for MEO SAR imaging. First, the point target spectrum of the modified equivalent squint range model-based signal is derived, where a concise expression is obtained by the method of series reversion. Second, the well-known NLCS algorithm is modified according to the new spectrum and an improved algorithm is developed. The range dependence of the two-dimensional point target reference spectrum is removed by improved CS processing, and accurate focusing is realized through range-matched filter and range-dependent azimuth-matched filter. Simulations are performed to validate the presented algorithm.

Paper Details

Date Published: 13 February 2015
PDF: 13 pages
J. Appl. Remote Sens. 9(1) 096084 doi: 10.1117/1.JRS.9.096084
Published in: Journal of Applied Remote Sensing Volume 9, Issue 1
Show Author Affiliations
Pengbo Wang, BeiHang Univ. (China)
The Univ. of Sheffield (United Kingdom)
Wei Liu, The Univ. of Sheffield (United Kingdom)
Jie Chen, BeiHang Univ. (China)
Wei Yang, BeiHang Univ. (China)
Yu Han, BeiHang Univ. (China)


© SPIE. Terms of Use
Back to Top