Microwave photonic video imaging radar with widely tunable bandwidth for monitoring diverse airspace targets
| Autor: | Jianghai Wo, Anle Wang, Wenshan Cong, Yong Zhu, Jixiang Fu, Jin Zhang, Yalan Wang, Haida Yang, Lan Yu, Ranran Liu, Xiong Luo |
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| Rok vydání: | 2019 |
| Předmět: |
Digital signal processor
Computer science business.industry Bandwidth (signal processing) ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ComputerApplications_COMPUTERSINOTHERSYSTEMS 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Video imaging Optics law 0103 physical sciences Electronic engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry Radar 0210 nano-technology business Microwave photonics |
| Zdroj: | Optics Communications. 451:296-300 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2019.06.073 |
| Popis: | A microwave photonic (MWP) video imaging radar with a bandwidth tuning range of 0–10 GHz is proposed and experimentally demonstrated. In the transmitting path, high-frequency radar transmission signals with varied bandwidths are generated by optical frequency multiplication of an electrical low-frequency signal with tunable bandwidth, which enables radar to image targets with proper resolution and thus optimizes the balance between the observation distance and resolution. In the receiving path, in order to realize video imaging, the high-frequency echo signals with large bandwidth, after being subjected to MWP down-conversion technology for de-chirping, can be sampled by a low-speed and high-precision analog-to-digital converter Then, a digital signal processor is employed for processing the sampled echo data to realize video imaging. In field experiments, imaging ability with varied resolution is firstly verified by imaging Boeing 737 airliner with different-bandwidth radar signals. Moreover, continuous monitoring the flight process of non-cooperative Boeing 737 airliner and unmanned aerial vehicle also successfully demonstrates the video imaging ability of the proposed MWP radar. The capturing of detail structures and the recognition of target flight posture changes all indicate a great potential of the MWP radar for observing distant-range targets of interest. |
| Databáze: | OpenAIRE |
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