W-Band FMCW MIMO Radar System for High-Resolution Multimode Imaging With Time- and Frequency-Division Multiplexing
| Autor: | Seok Kim, Jeongbae Kim, Se-Yeon Jeon, Munsung Kim, Sumin Kim, Min-Ho Ka, Seungha Shin |
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| Rok vydání: | 2020 |
| Předmět: |
Synthetic aperture radar
W-band multiple-input multiple-output (MIMO) Computer science MIMO ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 0211 other engineering and technologies Polarimetry 02 engineering and technology Frequency-modulated continuous wave (FMCW) Multiplexing Frequency-division multiplexing W band Radar imaging Electronic engineering Waveform Electrical and Electronic Engineering Center frequency Computer Science::Information Theory 021101 geological & geomatics engineering transceiver Mimo radar synthetic aperture radar (SAR) orthogonal waveform Interferometry multimode imaging General Earth and Planetary Sciences Continuous wave radar |
| Zdroj: | IEEE Transactions on Geoscience and Remote Sensing. 58:5042-5057 |
| ISSN: | 1558-0644 0196-2892 |
| DOI: | 10.1109/tgrs.2020.2971998 |
| Popis: | A W-band multiple-input multiple-output (MIMO) radar imaging system has been proposed. The $4 \times 4$ radar system that forms a 2-D virtual array operates at a center frequency of 94 GHz and bandwidth of 1 GHz with frequency-modulated continuous wave. A hybrid scheme comprising time- and frequency-division multiplexing is introduced for establishing orthogonal waveforms, where the transmit channels perform alternate transmission in pairs. The proposed scheme can efficiently extend the number of MIMO channels utilizing the existing hardware with simultaneous transmission. The design, implementation, measurements, and imaging results of the proposed radar system have been presented. The imaging performance was tested through outdoor experiments. The high-resolution performance was shown with images generated using a synthetic aperture radar. The impulse responses of all channels were measured, and the resolution was confirmed to be 0.15 m in all the channels. In addition, a human and a car at 100-m range were imaged using the proposed radar system. The polarimetric and interferometric capabilities were tested for multimode imaging with the MIMO configuration. Overall, the measurements and experimental results verified the feasibility of the proposed MIMO radar with hybrid scheme as a high-resolution multimode imaging system. |
| Databáze: | OpenAIRE |
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