A Modified Subpulse SAR Processing Procedure Based on the Range-Doppler Algorithm for Synthetic Wideband Waveforms

Synthetic wideband waveforms (SWW) combine a stepped frequency CW waveform and a chirp signal waveform to achieve high range resolution without requiring a large bandwidth or the consequent very high sampling rate. If an efficient algorithm like the range-Doppler algorithm (RDA) is used to acquire t...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2008-12, Vol.8 (12), p.8224-8236
Main Authors: Lim, Byoung-Gyun, Woo, Jea-Choon, Lee, Hee-Young, Kim, Young-Soo
Format: Article
Language:English
Subjects:
Algorithms
Approximation
Bandwidths
Range-Doppler Algorithm (RDA)
Sensors
Signal processing
Synthetic Aperture Radar (SAR)
Synthetic Wideband Waveforms (SWW)
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Summary:Synthetic wideband waveforms (SWW) combine a stepped frequency CW waveform and a chirp signal waveform to achieve high range resolution without requiring a large bandwidth or the consequent very high sampling rate. If an efficient algorithm like the range-Doppler algorithm (RDA) is used to acquire the SAR images for synthetic wideband signals, errors occur due to approximations, so the images may not show the best possible result. This paper proposes a modified subpulse SAR processing algorithm for synthetic wideband signals which is based on RDA. An experiment with an automobile-based SAR system showed that the proposed algorithm is quite accurate with a considerable improvement in resolution and quality of the obtained SAR image.
ISSN:1424-8220
1424-8220
DOI:10.3390/s8128224