A Photonics-Based Coherent Dual-Band Radar for Super-Resolution Range Profile

Shaowen Peng; Shangyuan Li; Xiaoxiao Xue; Xuedi Xiao; Dexin Wu; Xiaoping Zheng

doi:10.1109/JPHOT.2019.2929210

IEEE Photonics Journal (Jan 2019)

A Photonics-Based Coherent Dual-Band Radar for Super-Resolution Range Profile

Shaowen Peng,
Shangyuan Li,
Xiaoxiao Xue,
Xuedi Xiao,
Dexin Wu,
Xiaoping Zheng

Affiliations

Shaowen Peng: ORCiD; Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
Shangyuan Li: ORCiD; Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
Xiaoxiao Xue: ORCiD; Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
Xuedi Xiao: ORCiD; Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
Dexin Wu: Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
Xiaoping Zheng: ORCiD; Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China

DOI: https://doi.org/10.1109/JPHOT.2019.2929210
Journal volume & issue: Vol. 11, no. 4
pp. 1 – 8

Abstract

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We propose and demonstrate a photonics-based coherent dual-band radar for super-resolution range profile in this paper. This radar cannot only generate coherent dual-band linear frequency modulated signals with large bandwidths, but also realize a paralleled coherent de-chirping processing to the dual-band echoes simultaneously based on a single compact photonics-assisted transceiver. The sharing of a single transceiver for signals with different bands ensures perfect stability and coherence among the waveforms, which makes it possible to realize a super-resolution range profile by fusion of dual-band signals without heavy computation on phase compensation. In the experiment, the radar operates in S-band with a bandwidth of 1.5 GHz and X-band with a bandwidth of 3 GHz, and results show its range resolution is up to 1.6 cm by coherent fusion processing, which is nearly corresponding to the resolution gotten by a linear frequency modulated wave with a bandwidth of 9.5 GHz ranging from 2 GHz to 11.5 GHz, much higher than the scenario when the radar is operated in the single-band mode. This technology would improve the accuracy of classification and recognition of the targets.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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