Range resolution improvement of range gated lidar system by phase coded method

The conventional range gated lidar systems require long laser pulse width and range bins to maintain the far detection range, which limits the ranging resolution of the system. A range gated lidar system with phase coded method is proposed with high ranging resolution. The system utilizes a kN+1 bit...

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Bibliographic Details
Main Authors: Long Wu, Jiajia Xu, Xiaocheng Yang, Wentao Lv, Qingheng Zhang, Jindi Yan, Yong Zhang, Yuan Zhao
Format: Conference Proceeding
Language:English
Subjects:
Detectors
Distance measurement
Laser radar
Lasers
Logic gates
Modulation
phase coded method
Range gated lidar
Resolution improvement
Signal resolution
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Summary:The conventional range gated lidar systems require long laser pulse width and range bins to maintain the far detection range, which limits the ranging resolution of the system. A range gated lidar system with phase coded method is proposed with high ranging resolution. The system utilizes a kN+1 bits of the laser pulse sequence and controls the accumulation of the detector in the range bins to get the echo signals. The correlation calculation of the accumulated signals is conducted in the computer to acquire the targe range with the ranging resolution defined by the sequence bit width. The indoor demonstration experiment achieved 2 us resolution with the sampling period of 32 us by employing a 15-bit m-sequence. The result shows the ability of achieving high ranging resolution of range gated lidar.
ISSN:2153-7003
DOI:10.1109/IGARSS.2016.7730621