Next Article in Journal
An Improved Compressive Sensing and Received Signal Strength-Based Target Localization Algorithm with Unknown Target Population for Wireless Local Area Networks
Previous Article in Journal
Denoising Algorithm for CFA Image Sensors Considering Inter-Channel Correlation
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(6), 1237; doi:10.3390/s17061237

Generalized Chirp Scaling Combined with Baseband Azimuth Scaling Algorithm for Large Bandwidth Sliding Spotlight SAR Imaging

1
School of Electronic Science and Engineering, National University of Defense Technology, Sanyi Avenue, Changsha 410073, China
2
China Electronics Technology Group Corporation (CETC), China Academy of Electronics and Information Technology, Beijing 100846, China
*
Author to whom correspondence should be addressed.
Received: 13 February 2017 / Revised: 16 May 2017 / Accepted: 26 May 2017 / Published: 29 May 2017
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [4416 KB, uploaded 31 May 2017]   |  

Abstract

This paper presents an efficient and precise imaging algorithm for the large bandwidth sliding spotlight synthetic aperture radar (SAR). The existing sub-aperture processing method based on the baseband azimuth scaling (BAS) algorithm cannot cope with the high order phase coupling along the range and azimuth dimensions. This coupling problem causes defocusing along the range and azimuth dimensions. This paper proposes a generalized chirp scaling (GCS)-BAS processing algorithm, which is based on the GCS algorithm. It successfully mitigates the deep focus along the range dimension of a sub-aperture of the large bandwidth sliding spotlight SAR, as well as high order phase coupling along the range and azimuth dimensions. Additionally, the azimuth focusing can be achieved by this azimuth scaling method. Simulation results demonstrate the ability of the GCS-BAS algorithm to process the large bandwidth sliding spotlight SAR data. It is proven that great improvements of the focus depth and imaging accuracy are obtained via the GCS-BAS algorithm. View Full-Text
Keywords: generalized chirp scaling; baseband azimuth scaling; large bandwidth; sliding spotlight generalized chirp scaling; baseband azimuth scaling; large bandwidth; sliding spotlight
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yi, T.; He, Z.; He, F.; Dong, Z.; Wu, M. Generalized Chirp Scaling Combined with Baseband Azimuth Scaling Algorithm for Large Bandwidth Sliding Spotlight SAR Imaging. Sensors 2017, 17, 1237.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top