Improved echo signal detection for pseudo-random single-photon counting laser ranging

In this paper, a new echo signal detection method, to the best of our knowledge, for pseudo-random single-photon counting ranging (PSPCR) LiDAR systems is proposed, which is applied for long distances, low repetition rates, and system cost reduction. First, in order to achieve a comparable temporal...

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Veröffentlicht in:Applied optics (2004) 2024-08, Vol.63 (23), p.6173
Hauptverfasser: Qu, Shihan, Li, Guobing, Li, Jie, Zhang, Guomei
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Li, Guobing
Li, Jie
Zhang, Guomei
description In this paper, a new echo signal detection method, to the best of our knowledge, for pseudo-random single-photon counting ranging (PSPCR) LiDAR systems is proposed, which is applied for long distances, low repetition rates, and system cost reduction. First, in order to achieve a comparable temporal resolution as that in time-correlated single-photon counting (TCSPC) systems, we extend the pseudo-random code to discriminate the minimal time slot in time correlation. Second, we use the full width at half maxima (FWHM) in the duration of each pseudo-random code for correlation to reduce the impact of pulse width variation and timing jitters on ranging accuracy. Third, we study the bias and errors caused by using synchronous signals as the “START” signal, and propose to use the time of flight (ToF) at half energy to reduce the walk error. Simulation results show that, compared with existing PSPCR methods, the proposed method improves ranging accuracy with a lower repetition rate and lower peak and average power—centimeter-level ranging accuracy over tens of kilometers can be achieved using a laser with a repetition rate of 400 kHz, peak power of up to 1 kW, and average power of up to 1 W.
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subjects Accuracy
Correlation
Error analysis
Error reduction
Laser ranging
Photons
Pseudorandom
Pulse duration
Repetition
Signal detection
Temporal resolution
Time correlation functions
Timing jitter
title Improved echo signal detection for pseudo-random single-photon counting laser ranging
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