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Suppression of sidelobes in MIMO radar with distinctive piecewise non-linear frequency modulation sub-carrier

Zhao, Y; Lu, X; Ritchie, M; Su, W; Gu, H; (2020) Suppression of sidelobes in MIMO radar with distinctive piecewise non-linear frequency modulation sub-carrier. International Journal of Remote Sensing , 41 (1) pp. 353-372. 10.1080/01431161.2019.1641644. Green open access

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Abstract

High sidelobes exist in normal multiple-input multiple-output (MIMO) radar waveforms, which utilize linear frequency modulation (LFM) or non-linear frequency modulation (NLFM) waveforms with the same subcarrier durations. Since the waveforms have the same expression, and each segment of the subcarriers can be only controlled by a few parameters to make them distinctive. This will cause comparatively high auto-correlation sidelobes in each zone of subcarriers. In order to suppress the sidelobes, new piecewise NLFM waveforms have been proposed in this paper. These novel MIMO radar waveforms are composed of three different kinds of subcarriers with totally different mathematical expressions. This is verified by the fact that the cross-correlation sidelobes between different subcarriers are much lower than the auto-correlation of each subcarrier. In addition, the number of MIMO radar waveforms has been improved significantly. As different subcarriers have their own controllable parameters, a genetic algorithm will be applied to generate the novel MIMO radar waveforms. Numerical results demonstrate the effectiveness that the auto-correlation sidelobes and the cross-correlation sidelobes of our proposed waveforms are reduced.

Type: Article
Title: Suppression of sidelobes in MIMO radar with distinctive piecewise non-linear frequency modulation sub-carrier
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/01431161.2019.1641644
Publisher version: https://doi.org/10.1080/01431161.2019.1641644
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10078119
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