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

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

Author Affiliations +

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.

Citation Download Citation

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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