DocumentCode :
1781361
Title :
Diverse, orthogonal waveforms and signal processing architecture for joint GMTI and SAR applications
Author :
Majumder, Uttam K. ; Bell, M.R. ; Rangaswamy, Muralidhar
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
fYear :
2014
fDate :
19-23 May 2014
Firstpage :
1396
Lastpage :
1401
Abstract :
In this research, we introduce a signal processing framework for joint GMTI and SAR algorithms that is based on orthogonal (transmit and receive) waveforms. Traditionally, radar systems are configured to operate either in GMTI or SAR processing mode, but not both simultaneously. This is due to the fact that operational parameters for these two modes are quite different. For example, exoclutter GMTI processing requires a high pulse repetition frequency (PRF), but a high PRF results in increased range ambiguity - and an increased processing burden - in SAR imaging. We propose combining diverse, orthogonal waveforms and introducing corresponding processing techniques to reduce the problems and complexities of joint GMTI and SAR exploitation. For the exoclutter GMTI problem, the necessary high-PRF pulse train will be used to achieve finer Doppler resolution for detecting fast moving objects. For the endoclutter GMTI and SAR imaging problem, we will transmit low PRF pulses. The goal for low PRF pulses for endoclutter GMTI and SAR imaging is to ensure that range ambiguity issue has been addressed. These new approaches will achieve following benefits: (1) accomplish GMTI and SAR processing concurrently by eliminating the complexities associated with reconfiguring a radar system, (2) more efficiently use bandwidth by employing appropriate bandwidth for exoclutter GMTI pulses and SAR image formation pulses, and (3) reduce range ambiguity issue associated with high PRF operation.
Keywords :
Doppler shift; object detection; radar detection; radar imaging; radar resolution; synthetic aperture radar; Doppler resolution; SAR image formation pulses; SAR processing mode; diverse orthogonal waveforms; exoclutter GMTI processing; fast moving object detection; ground moving target indication; high pulse repetition frequency; joint GMTI-SAR algorithm; low PRF pulses; radar systems; range ambiguity; signal processing architecture; synthetic aperture radar; transmit and receive waveforms; Bandwidth; Doppler effect; Joints; Receiving antennas; Signal processing algorithms; Synthetic aperture radar; Endoclutter GMTI; Exoclutter GMTI; Ground Moving Target Indication (GMTI); Orthogonal Waveforms; Synthetic Aperture Radar(SAR);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radar Conference, 2014 IEEE
Conference_Location :
Cincinnati, OH
Print_ISBN :
978-1-4799-2034-1
Type :
conf
DOI :
10.1109/RADAR.2014.6875818
Filename :
6875818
Link To Document :
بازگشت