NDLI: Efficient TOPS mode raw data simulator of extended scenes

Content Provider	IET Digital Library
Author	Yang, Liang Wang, Gang Lv, Gaohuan
Abstract	The terrain observation by progressive scans (TOPS) mode is a novel wide-swath imaging scheme, and it reduces the major drawbacks existing in conventional ScanSAR. An accurate and efficient synthetic aperture radar (SAR) raw data generator of distributed extended scenes is of considerable value for testing system parameters and verifying the imaging algorithms, particularly when the real raw data of recently proposed imaging mode are not available yet. The TOPS mode raw data simulation can only be exactly and directly realised in the time domain because an azimuth window function is not be suitable for each point target echo in the scene, however it is not efficient especially when simulating an extended scene. In this study, a novel TOPS mode raw data simulation method is presented to solve above issues. In this approach, an azimuth linear frequency modulated signal is introduced to form the azimuth window function and the echo is obtained in two-dimensional frequency domain by chirp-z transformation, which improves the efficiency greatly while retaining the simulation accuracy. Simulation results for point targets and a real SAR image demonstrate its validity and effectiveness.
Starting Page	1065
Ending Page	1070
Page Count	6
ISSN	17518784
Volume Number	10
e-ISSN	17518792
Issue Number	Issue 6, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/10/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2015.0355
Journal	IET Radar, Sonar & Navigation
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Azimuth Linear Frequency Modulated Signal Azimuth Window Function Chirp-z Transformation Distributed Extended Scene FM Radar Image Scanners Integral Transforms Optical, Image And Video Signal Processing Radar Equipment Radar Imaging Raw Data Generator ScanSAR Imaging Synthetic Aperture Radar System And Application Terrain Observation by Progressive Scans TOPS Mode Raw Data Simulation Method Transform Two-dimensional Frequency Domain Analysis Wide-swath Imaging Scheme
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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