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Content Provider | IET Digital Library |
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Author | Xu, Haisheng Wang, Jian Yuan, Jian Wang, Robert Shan, Xiuming |
Abstract | In this paper, a stepped-frequency spaceborne/airborne bistatic synthetic aperture radar (SFSA-BiSAR) configuration is proposed to show to improve the range resolution of BiSAR. First, the geometry and the signal model of SFSA-BiSAR are formulated, and then an analytical bistatic point target reference spectrum (BPTRS) is derived. Second, based on the developed BPTRS, two imaging algorithms called combination-before-focusing algorithm (CBFA) and combination-after-focusing algorithm (CAFA) are proposed to obtain BiSAR images with improved range resolution. CBFA uses sub-band combination to obtain synthetic BPTRS, and then uses a new bistatic frequency-domain algorithm (BFDA) to obtain the improved BiSAR image, whereas CAFA first uses the BFDA to focus all the sub-pulses, and then uses sub-image combination to obtain the improved BiSAR image. Both of the two algorithms can focus the SFSA-BiSAR signal well and comparison simulations are performed to verify the authors' conclusion. Computation loads are also calculated to compare the two algorithms and show that CAFA uses less floating-point operations than CBFA. Besides, some important parameters of SFSA-BiSAR are analysed both theoretically and numerically to provide a reference for system design. |
Starting Page | 377 |
Ending Page | 386 |
Page Count | 10 |
ISSN | 17519675 |
Volume Number | 9 |
e-ISSN | 17519683 |
Issue Number | Issue 4, Jun (2015) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-spr/9/4 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2014.0196 |
Journal | IET Signal Processing |
Publisher Date | 2015-05-26 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Analytical Bistatic Point Target Reference Spectrum Analytical BPTRS BFDA Bistatic Frequency-domain Algorithm CAFA CBFA Combination-after-focusing Algorithm Combination-before-focusing Algorithm Floating-point Operation Frequency Domain Analysis Imaging Algorithm Improved BiSAR Image Optical, Image And Video Signal Processing Radar Equipment Radar Imaging Radar Resolution Range-resolution Improvement SFSA-BiSAR Configuration Signal Model Spaceborne-airborne Bistatic Synthetic Aperture Radar Stepped-frequency Chirp Trains Sub-band Combination Sub-image Combination Synthetic Aperture Radar Synthetic BPTRS System And Application System Design |
Content Type | Text |
Resource Type | Article |
Subject | Signal Processing Electrical and Electronic Engineering |
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