Time Reversal in Multiple-Input Multiple-Output Radar

• Published in: IEEE journal of selected topics in signal processing Vol. 4; no. 1; pp. 210 - 225
• Main Authors: Yuanwei Jin, Moura, J.M.F., O'Donoughue, N.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2010; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Channels; Detection; Likelihood ratio; Mathematical models; MIMO; multiple-input multiple-output (MIMO) radar; Phased arrays; Radar; Radar antennas; Radar detection; Radar scattering; Scattering; Space technology; Spaceborne radar; Strategy; Testing; time reversal; Transmitting antennas; waveform design; Waveforms
• ISSN: 1932-4553; 1941-0484
• DOI: 10.1109/JSTSP.2009.2038983

Time reversal explores the rich scattering in a multipath environment to achieve high target detectability. Multiple-input multiple-output (MIMO) radar is an emerging active sensing technology that uses diverse waveforms transmitted from widely spaced antennas to achieve increased target sensitivity when compared to standard phased arrays. In this paper, we combine MIMO radar with time reversal to automatically match waveforms to a scattering channel and further improve the performance of radar detection. We establish a radar target model in multipath rich environments and develop likelihood ratio tests for the proposed time-reversal MIMO radar (TR-MIMO). Numerical simulations demonstrate improved target detectability compared with the commonly used statistical MIMO strategy.