A Novel Approach to Unambiguous Doppler Beam sharpening for Forward-looking MIMO Radar

Journal article (2022)

Authors

S. Yuan

P.J. Aubry

F. Fioranelli

Alexander Yarovoy

DOI: https://doi.org/10.1109/JSEN.2022.3215862

Radar Sensors Doppler effect Doppler radar Radar antennas Signal resolution Radar imaging Beam scan Doppler beam sharpening Forward-looking radar MIMO radar processing

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Published Date

2022

Language

English

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Abstract

The ambiguity problem of targets in Doppler beam sharpening (DBS) with forward-looking radar is considered. While DBS is proposed earlier to improve the angular resolution of the radar while keeping the antenna aperture size limited, such a solution suffers from ambiguities in the case of targets positioned symmetrically with respect to the platform movement. To address this problem, an approach named unambiguous Doppler-based forward-looking multiple-input multiple-output (MIMO) radar beam sharpening scan (UDFMBSC) is proposed, based on the combination of MIMO processing and DBS. The performance of the proposed method is compared to existing approaches using simulated data with point-like and extended targets. The method is successfully verified using experimental data.

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