Range resolution improvement of phase coded lidar system utilizing detector characteristics for short codes acquirement

Long Wu; Tianyuan Qiao; Jun Zhang; Yong Zhang; Yuan Zhao

doi:10.1117/12.2067031

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13 October 2014 Range resolution improvement of phase coded lidar system utilizing detector characteristics for short codes acquirement

Long Wu, Tianyuan Qiao, Jun Zhang, Yong Zhang, Yuan Zhao

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Proceedings Volume 9250, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VIII; and Military Applications in Hyperspectral Imaging and High Spatial Resolution Sensing II; 925008 (2014) https://doi.org/10.1117/12.2067031
Event: SPIE Security + Defence, 2014, Amsterdam, Netherlands

Abstract

The conventional phase coded lidar systems require the collection of every returned laser pulse and are restricted in range resolution by sampling frequency and subpulse width. A phase coded lidar system with high range resolution is proposed with the accumulated m-sequence acquisition method by utilizing detector characteristics for signal detection. The detector accumulates kN-1 or kN+1 bits of the emitted laser sequence to deduce the a single bit of the sequence. The indoor experiment achieved 2 us resolution with the sampling period of 28 and 32 us by employing a 15-bit m-sequence. This method achieves the acquisition of m-sequence with narrow subpulse width whereas the sampling frequency is kept low. The experiment results showed an approach to implement the phase coded imaging lidar into practical application.

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Long Wu, Tianyuan Qiao, Jun Zhang, Yong Zhang, and Yuan Zhao "Range resolution improvement of phase coded lidar system utilizing detector characteristics for short codes acquirement", Proc. SPIE 9250, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VIII; and Military Applications in Hyperspectral Imaging and High Spatial Resolution Sensing II, 925008 (13 October 2014); https://doi.org/10.1117/12.2067031

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