title: A Modified Subpulse SAR Processing Procedure Based on the Range-Doppler Algorithm for Synthetic Wideband Waveforms.
abstract: 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.
authors.affiliation: 1-Division of Electrical and Computer Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk, 790-784, South Korea. emyhand@postech.ac.kr.
authors.forename: Byoung-Gyun
authors.initials: BG
authors.lastname: Lim
authors.affiliation: 1-Division of Electrical and Computer Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk, 790-784, South Korea. digidev@postech.ac.kr.
authors.forename: Jea-Choon
authors.initials: JC
authors.lastname: Woo
authors.affiliation: 2-Agency for Defense Development, Daejeon, South Korea. youngone@add.re.kr.
authors.forename: Hee-Young
authors.initials: HY
authors.lastname: Lee
authors.affiliation: 1-Division of Electrical and Computer Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk, 790-784, South Korea. ysk@postech.ac.kr.
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Kim
keywords: Range-Doppler Algorithm (RDA); Synthetic Aperture Radar (SAR); Synthetic Wideband Waveforms (SWW)