Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation

A coherent random-modulated continuous-wave (RMCW) LiDAR transmits a lightwave modulated by a pseudo-random binary sequence (PRBS). The lightwave backscattered from targets is received and used to reconstruct the PRBS. Then, the time-of-flight is extracted by correlating the reconstructed PRBS and t...

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Autores principales:	Zhongyang Xu, Fengxi Yu, Bowen Qiu, Yawei Zhang, Yu Xiang, Shilong Pan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	LiDAR random-modulated continuous-wave phase-coding subcarrier modulation Doppler frequency shift Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/b423b8401bb14bf1a1281f026194b50d
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spelling	oai:doaj.org-article:b423b8401bb14bf1a1281f026194b50d2021-11-25T18:43:07ZCoherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation10.3390/photonics81104752304-6732https://doaj.org/article/b423b8401bb14bf1a1281f026194b50d2021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/475https://doaj.org/toc/2304-6732A coherent random-modulated continuous-wave (RMCW) LiDAR transmits a lightwave modulated by a pseudo-random binary sequence (PRBS). The lightwave backscattered from targets is received and used to reconstruct the PRBS. Then, the time-of-flight is extracted by correlating the reconstructed PRBS and the original PRBS. We propose a coherent RMCW LiDAR based on phase-coded subcarrier modulation, in which the impacts of internal reflection and optical Doppler frequency shift (DFS) are mitigated. A continuous lightwave is amplitude-modulated by an RF signal which is phase-coded with a PRBS. Coherent detection is used in the receiver. A beat signal that consisted of a low-frequency signal and a high-frequency signal is obtained by a single balanced photodetector (BPD). The optical DFS can be directly extracted from the low-frequency signal. It is used to compensate for the frequency offset of PRBS, which is extracted from the high-frequency signal. In addition, the background noise caused by internal reflection is suppressed by averaging over successive measurement spots. In this paper, the performance of a coherent RMCW LiDAR is firstly analyzed by numeric simulations and demonstration experiments. Then, line-scanning measurements for moving targets are implemented to demonstrate the 3D imaging capability of the proposed coherent RMCW LiDAR.Zhongyang XuFengxi YuBowen QiuYawei ZhangYu XiangShilong PanMDPI AGarticleLiDARrandom-modulated continuous-wavephase-codingsubcarrier modulationDoppler frequency shiftApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 475, p 475 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	LiDAR random-modulated continuous-wave phase-coding subcarrier modulation Doppler frequency shift Applied optics. Photonics TA1501-1820
spellingShingle	LiDAR random-modulated continuous-wave phase-coding subcarrier modulation Doppler frequency shift Applied optics. Photonics TA1501-1820 Zhongyang Xu Fengxi Yu Bowen Qiu Yawei Zhang Yu Xiang Shilong Pan Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
description	A coherent random-modulated continuous-wave (RMCW) LiDAR transmits a lightwave modulated by a pseudo-random binary sequence (PRBS). The lightwave backscattered from targets is received and used to reconstruct the PRBS. Then, the time-of-flight is extracted by correlating the reconstructed PRBS and the original PRBS. We propose a coherent RMCW LiDAR based on phase-coded subcarrier modulation, in which the impacts of internal reflection and optical Doppler frequency shift (DFS) are mitigated. A continuous lightwave is amplitude-modulated by an RF signal which is phase-coded with a PRBS. Coherent detection is used in the receiver. A beat signal that consisted of a low-frequency signal and a high-frequency signal is obtained by a single balanced photodetector (BPD). The optical DFS can be directly extracted from the low-frequency signal. It is used to compensate for the frequency offset of PRBS, which is extracted from the high-frequency signal. In addition, the background noise caused by internal reflection is suppressed by averaging over successive measurement spots. In this paper, the performance of a coherent RMCW LiDAR is firstly analyzed by numeric simulations and demonstration experiments. Then, line-scanning measurements for moving targets are implemented to demonstrate the 3D imaging capability of the proposed coherent RMCW LiDAR.
format	article
author	Zhongyang Xu Fengxi Yu Bowen Qiu Yawei Zhang Yu Xiang Shilong Pan
author_facet	Zhongyang Xu Fengxi Yu Bowen Qiu Yawei Zhang Yu Xiang Shilong Pan
author_sort	Zhongyang Xu
title	Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
title_short	Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
title_full	Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
title_fullStr	Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
title_full_unstemmed	Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation
title_sort	coherent random-modulated continuous-wave lidar based on phase-coded subcarrier modulation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b423b8401bb14bf1a1281f026194b50d
work_keys_str_mv	AT zhongyangxu coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation AT fengxiyu coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation AT bowenqiu coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation AT yaweizhang coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation AT yuxiang coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation AT shilongpan coherentrandommodulatedcontinuouswavelidarbasedonphasecodedsubcarriermodulation
_version_	1718410795492048896

Coherent Random-Modulated Continuous-Wave LiDAR Based on Phase-Coded Subcarrier Modulation

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