METHODS AND APPARATUS FOR SINGLE-SHOT TIME-OF-FLIGHT RANGING WITH BACKGROUND LIGHT REJECTION

Title:

METHODS AND APPARATUS FOR SINGLE-SHOT TIME-OF-FLIGHT RANGING WITH BACKGROUND LIGHT REJECTION

Document Type and Number:

WIPO Patent Application WO/2023/150920

Kind Code:

A1

Abstract:

Provided herein is a method and device for time-of-flight (TOF) ranging. The method (300) includes generating, by each photon detector in a photon detector array, a quantized current pulse each time a predefined number of photons is detected (302); summing, by a current adder, the quantized current pulses from all photon detectors to create an analog signal pulse (304); providing, by a peak detector, a digital pulse for each instance where an intensity of the analog signal pulse is greater than signal peaks already measured after the last emitted pulsed laser shot (306); measuring and recording, by a time-to-digital converter (TDC), a TOF each time the digital pulse is provided (308); providing, by a TOF output, a single TDC result indicative of a TOF associated with the analog signal pulse having a highest intensity (310). The device (400) includes a photon detector, a current adder (408), an analog peak detector (412) and a time-of-flight digital converter (422), wherein each component is configured to perform the respective aspect of the method.

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Inventors:

INCORONATO ALFONSO (IT)
PASQUINELLI KLAUS (IT)
LOCATELLI MAURO (IT)
ZAPPA FRANCO (IT)
MASSOUD ALI AHMED ALI (CA)
GAO HONGBIAO (CN)
SUN HAITAO (CA)
ZENG LI (CN)

Application Number:

PCT/CN2022/075580

Publication Date:

August 17, 2023

Filing Date:

February 09, 2022

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)
MILANO POLITECNICO (IT)

International Classes:

G01S17/10

Foreign References:

CN113424077A	2021-09-21
CN109725326A	2019-05-07
CN113885036A	2022-01-04
CN112255637A	2021-01-22
US20140307248A1	2014-10-16
CN113777587A	2021-12-10
US20150069250A1	2015-03-12
CN111742241A	2020-10-02

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