Pulsed-chaos MIMO radar based on a single flat-spectrum and Delta-like autocorrelation optical chaos source

Feng, W., Jiang, N., Zhang, Y., Jin, J., Zhao, A., Liu, S. and Qiu, K. (2022) Pulsed-chaos MIMO radar based on a single flat-spectrum and Delta-like autocorrelation optical chaos source. Optics Express, 30(4), pp. 4782-4792. (doi: 10.1364/OE.450949) (PMID:35209452)

Abstract

We propose and demonstrate a pulsed-chaos multiple-input-multiple-output (MIMO) radar system in this paper. In the proposed MIMO radar system, multi-channel pulsed chaotic signals are extracted from an optical seed chaos source with Delta-like autocorrelation and flat spectrum. The seed chaos source is generated by passing the chaotic output of an external-cavity semiconductor laser through a dispersive self-feedback phase-modulation loop and used for MIMO radar signal generation. The cross-correlation characteristics of MIMO radar signals, the maximum channel number of separable mixed echoes, as well as the performances of multi-target ranging and anti-interference in the proposed pulsed-chaos MIMO radar system are systematically investigated. The results indicate that multi-channel pulsed-chaos signals with Delta-like autocorrelation can be simultaneously generated from the seed chaos source, and excellent quasi-orthogonality of transmission radar signals can be guaranteed. Moreover, it is demonstrated that the proposed pulsed-chaos MIMO radar supports multi-target ranging with a centimeter-level resolution and can maintain satisfactory performance under low SNR scenarios with various interferences.

• Item Type: Articles
• Additional Information: Funding: National Natural Science Foundation of China (61671119, 62171087); Sichuan Science and Technology Program (2021JDJQ0023); Fundamental Research Funds for the Central Universities (ZYGX2019J003); Science and Technology Commission of Shanghai Municipality (SKLSFO2020-05).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Zhang, Yiqun
• Authors: Feng, W., Jiang, N., Zhang, Y., Jin, J., Zhao, A., Liu, S., and Qiu, K.
• College/School: College of Science and Engineering > School of Engineering
• Journal Name: Optics Express
• Publisher: Optical Society of America
• ISSN: 1094-4087
• ISSN (Online): 1094-4087
• Published Online: 31 January 2022
• Copyright Holders: Copyright © 2022 Optica Publishing Group
• First Published: First published in Optics Express 30(4): 4782-4792
• Publisher Policy: Reproduced in accordance with the publisher copyright policy