NDLI: An accelerated chirp scaling algorithm for synthetic aperture imaging

Content Provider	IEEE Xplore Digital Library
Author	Hawkins, D.W. Gough, P.T.
Copyright Year	1997
Description	Author affiliation: Owens Valley Radio Obs., California Inst. of Technol., Pasadena, CA, USA (Hawkins, D.W.)
Abstract	The accelerated chirp scaling (ACS) algorithm is based on the chirp scaling (CS) algorithm, with the difference that the ACS algorithm processes pulse compressed data. To remove the range variant nature of the system impulse response, the ACS algorithm operates by chirp scaling the linear frequency modulated (LFM) signal that already exists in the range-Doppler domain of the pulse compressed data. This LFM signal is commonly compensated for in the CS algorithm and the range-Doppler algorithm by secondary range compression (SRC). Chirp scaling of the uncompensated SRC signal allows the ACS algorithm to operate on pulse compressed data, removing the overhead associated with the processing of data that still contains the LFM transmitted pulse (as is necessary in the CS algorithm). In cases where chirp scaling of the uncompensated SRC chirp does not yield adequate results, a range chirp with a chirp length on the order of the maximum differential range migration across the scene can be inserted into the data, and this new chirp can be scaled during processing.
Starting Page	471
Ending Page	473
File Size	474701
Page Count	3
File Format	PDF
ISBN	0780338367
DOI	10.1109/IGARSS.1997.615918
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-08-03
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acceleration Pulse compression methods Frequency modulation Pulse modulation Chirp modulation Signal processing Image coding Flexible printed circuits Interpolation Observatories
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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