Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding

Abstract

The intra-pulse spotlight imaging mode can effectively overcome the contradiction between high resolution and wide swath in spaceborne Synthetic Aperture Radar (SAR), and considers the echo’s signal-tonoise ratio. However, signal division by spatial filtering along the range direction may be impacted by fluctuating terrain. To solve this problem, a novel intra-pulse spotlight imaging method based on Azimuth Phase Coding (APC) is proposed in this paper. Using APC, the azimuth spectrum of echo data from different sub-pulses will locate in different Pulse Repetition Frequencies (PRF). As such, the signal can be divided using an azimuth adaptive beamforming technique. The signal separation method and selection of the shift factor are discussed in detail. Finally, simulation results demonstrate the effectiveness of the proposed method.

Journal

Title: Journal of Radars

Publisher: Chinese Academy of Sciences

Publication date (Electronic): 01 August 2018

Volume: 7

Issue: 4

Pages: 437-445

Affiliations

[1 ] ①(AVIC Leihua Electronic Technology Research Institute, Wuxi 214063, China)

[2 ] ②(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)

Article

Doaj ID: 0baf9788dbe645008c35dbad52bcc4e7

DOI: 10.12000/JR17114

License:

This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

Product

Self URI: http://radars.ie.ac.cn/fileup/HTML/R17114.htm

Self URI (journal page): http://radars.ie.ac.cn/EN/volumn/home.shtml

Categories

Subject: Technology (General)

Subject: T1-995