15 March 2013 Laser time-of-flight measurement based on multi-channel time delay estimation
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Abstract
In this paper, a novel method based on multichannel time delay estimation with linear fitting correction for laser time-of-flight (TOF) measurement is described. The laser TOF measurement system is constructed with a laser source, a stop receiver channel, a reference receiver multichannel, an ADC sampling unit and a digital signal processing unit. Limited by the sampling rate, the precision of laser TOF measurement is restricted no more than the ADC sampling period in conventional methods. As this problem is considered, multi-channel correlation time delay estimation with linear fitting correction is devised. It is shown that the measuring precision is better than 2ns with multi-channel time delay estimation and not influenced by SNR. The experimental results demonstrate that the proposed method is effective and stable.
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Chao Li, Chao Li, Qian Chen, Qian Chen, Guohua Gu, Guohua Gu, Tian Man, Tian Man, } "Laser time-of-flight measurement based on multi-channel time delay estimation ", Proc. SPIE 8611, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIII, 86111H (15 March 2013); doi: 10.1117/12.2002746; https://doi.org/10.1117/12.2002746
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