Ultra-low power anti-crosstalk collision avoidance light detection and ranging using chaotic pulse position modulation approach

Abstract

A novel concept of collision avoidance single-photon light detection and ranging (LIDAR) for vehicles has been demonstrated, in which chaotic pulse position modulation is applied on the transmitted laser pulses for robust anti-crosstalk purposes. Besides, single-photon detectors (SPD) and time correlated single photon counting techniques are adapted, to sense the ultra-low power used for the consideration of compact structure and eye safety. Parameters including pulse rate, discrimination threshold, and number of accumulated pulses have been thoroughly analyzed based on the detection requirements, resulting in specified receiver operating characteristics curves. Both simulation and indoor experiments were performed to verify the excellent anti-crosstalk capability of the presented collision avoidance LIDAR despite ultra-low transmitting power.

Analysis of interference suppression in single photon lidar

“…This article describes a flash LiDAR interference suppression scheme specifically designed to operate in TCSPC mode. The scheme is based on Pseudo Random Pulse Position Modulation (PR-PPM) [3][4] [5] , and simulation experiments are conducted to analyze the interference suppression effect under different cumulative cycles and different PPM random dynamic ranges.…”

Detection Probability Analysis of True Random Coding Photon Counting Lidar

“…To mitigate the possibility of interference, modulation coded lidars have been studied. Lidar systems with different aperiodic or irregular laser pulse modulation schemes, such as the pseudo-random modulation [8][9][10] and the chaotic pulse position modulation (CPPM) have been studied [11][12][13][14][15]. However, the pseudo-random modulation sequence is periodic and reproducible, so a malicious jammer can easily record the transmitting pseudo-random modulation sequence and then re-transmit it to generate false echo to interfere with the lidar [12].…”

Sensitivity to external optical feedback of circular-side hexagonal resonator microcavity laser*

“…[1][2][3] After researchers analyzed the nonlinear dynamics of semiconductor laser subject to optical feedback in early 1980, [4] enormous research effort was initiated, especially when they realized these behaviors could be useful. [5][6][7] Among these behaviors, chaos has attracted much attention since the properties of random oscillation and wide bandwidth could be applied in random number generation, [8][9][10] secure communication, [11,12] key distribution, [13,14] high speed information processing, [15,16] ranging, [17][18][19] and so on.…”