W-Band FMCW MIMO radar system for high-resolution multimode imaging with time- And frequency-division multiplexing

Se Yeon Jeon, Se Yeon Jeon, Sumin Kim, Jeongbae Kim, Seok Kim, Seungha Shin, Munsung Kim, Min Ho Ka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A W-band multiple-input multiple-output (MIMO) radar imaging system has been proposed. The 4 × 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.

Original languageEnglish
Article number9005385
Pages (from-to)5042-5057
Number of pages16
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume58
Issue number7
DOIs
Publication statusPublished - 2020 Jul

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Earth and Planetary Sciences(all)

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