Open AccessMicrowave photonic de-chirp receiver for breaking the detection range swath limitation
Author(s) -
Zhenwei Mo,
Chenyu Liu,
Jiyao Yang,
Yuchuang Sun,
Ruixuan Wang,
Jingwen Dong,
Wangzhe Li
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.422262
Subject(s) - chirp , photonics , optics , computer science , signal processing , radar , chirp spread spectrum , channel (broadcasting) , electronic engineering , telecommunications , physics , engineering , spread spectrum , laser , direct sequence spread spectrum
A novel microwave photonics-based de-chirp radar receiver which breaks the limitation of the detection range swath is proposed and demonstrated. In the proposed receiver, a multi-channel time-division photonics de-chirp processing is implemented to increase the detection range swath. A linear frequency modulated pulse train is sent to multiple reception channels and temporally delayed in the optical domain to form reference signal replicas, enabling time-division photonics-de-chirp processing with echoes reflected from different distance regions so that the total detection range swath is increased and determined by the number of reference replicas. Hardware-in-the-loop simulation experiments are demonstrated and an inverse synthetic aperture 2D imaging is carried out, showing that the MWP radar with the proposed photonics de-chirp receiver is capable of achieving a detection range swath of 13km which is 20 times larger than that when employing a conventional de-chirp receiver with the same parameters.