Title:
COHERENT LIDAR METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/184790
Kind Code:
A1
Abstract:
A light detection and ranging (LIDAR) apparatus (100) and a method (900) thereof are disclosed. The apparatus (100) includes: an emitter (110) configured to emit a first optical signal (112a) and a second optical signal (112b) in a common direction for reflection by an object (120), wherein an optical frequency of the first optical signal (112a) differs from an optical frequency of the second optical signal (112b) by a first frequency difference; and a receiver (130) configured to receive a first received optical signal (114a) due to reflection of the first optical signal (112a) by the object (120) and receive a second received optical signal (114b) due to reflection of the second optical signal (112b) by the object (120).The apparatus (100) is further configured to process the first received optical signal (114a) and the second received optical signal (114b) to measure velocity (122) of the object (120) toward or away from the apparatus (100) based on Doppler effect. The apparatus (100) is further configured to measure a distance to the object (120) based on time of flight.
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Inventors:
ZHANG CHUNSHU (CA)
DUMAIS PATRICK (CA)
GOODWILL DOMINIC (CA)
DUMAIS PATRICK (CA)
GOODWILL DOMINIC (CA)
Application Number:
PCT/CN2019/079030
Publication Date:
October 03, 2019
Filing Date:
March 21, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G01S17/58; G01S7/481; G01S7/4861; G01S17/10
Foreign References:
| CN204719233U | 2015-10-21 | |||
| CN107003411A | 2017-08-01 | |||
| US20160170023A1 | 2016-06-16 | |||
| CN101236253A | 2008-08-06 | |||
| CN205374743U | 2016-07-06 | |||
| CN103946716A | 2014-07-23 |
Other References:
ZHANG, JIAN HUA ET AL.: "Effect of Time-Frequency Disturbance on Performance of Dual- Frequency Laser Coherent Detection System", LASER & OPTOELECTRONICS PROGRESS, 31 December 2016 (2016-12-31), ISSN: 1006-4125
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