PRECISE RADIAL VELOCITY ESTIMATION FOR INVERSE SYNTHETIC APERTURE RADAR
| Autor: | Weixing Li, Jianzhi Lin, Zeng Ping Chen, Yue Zhang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
020301 aerospace & aeronautics Ambiguity resolution Velocity estimation business.industry Acoustics 0211 other engineering and technologies 02 engineering and technology Condensed Matter Physics Phase adjustment Electronic Optical and Magnetic Materials Sub wavelength Radial velocity Inverse synthetic aperture radar Optics 0203 mechanical engineering Pulse compression Coherence (signal processing) business ComputingMethodologies_COMPUTERGRAPHICS 021101 geological & geomatics engineering |
| Zdroj: | Progress In Electromagnetics Research M. 48:133-143 |
| ISSN: | 1937-8726 |
| Popis: | This paper describes a convenient technique of precise radial velocity estimation for inverse synthetic aperture radar (ISAR). In order to keep both the range profile and phase history of the echoes coherent, direct sampling with high sampling rate using high performance analog-to-digital converter and matched-filter correlation processing in pulse compression are used for the ISAR system. Due to the coherence property of the echoes, the translational motion compensation parameters for ISAR imaging are just the radial motion parameters of the target. Thus, the coarse velocity estimation is obtained by range alignment and fine velocity estimation is achieved by phase adjustment. The fine velocity estimation is ambiguous and the coarse velocity estimation is used for ambiguity resolution. The advantage of this technique is the high precision with range error values at sub wavelength levels, and it achieves velocity information and translational motion compensation at the same time. Both simulated and experimental validations are presented to verify the effectiveness of the proposed method. |
| Databáze: | OpenAIRE |
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