title: A Two Dimensional Overlapped Subaperture Polar Format Algorithm Based on Stepped-chirp Signal.
abstract: In this work, a 2-D subaperture polar format algorithm (PFA) based on steppedchirp signal is proposed. Instead of traditional pulse synthesis preprocessing, the presented method integrates the pulse synthesis process into the range subaperture processing. Meanwhile, due to the multi-resolution property of subaperture processing, this algorithm is able to compensate the space-variant phase error caused by the radar motion during the period of a pulse cluster. Point target simulation has validated the presented algorithm.
authors.affiliation: Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China. xinhua@nuaa.edu.cn.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Mao
authors.affiliation: Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
authors.forename: Daiyin
authors.initials: D
authors.lastname: Zhu
authors.affiliation: Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Nie
authors.affiliation: Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
authors.forename: Zhaoda
authors.initials: Z
authors.lastname: Zhu
keywords: Synthetic aperture radar (SAR); space-variant phase compensation; steppedchirp signal; subaperture; synthetic bandwidth