激光与光电子学进展, 2017, 54 (5): 051204, 网络出版: 2017-06-26   

基于单光子探测的不同重频下扩展伪随机编码规则

Extended Pseudo-Random Coding Rules with Different Repetition Frequency Based on Single Photon Detection
陈雨 1,2,*羊毅 2
作者单位
1 光电控制技术重点实验室, 河南 洛阳 471000
2 中国航空工业集团公司洛阳电光设备研究所, 河南 洛阳 471000
摘要
扩展伪随机编码可以解决高重频激光测距在目标距离远时带来的距离模糊问题, 但其编码方式多样。研究了不同激光源发射重频下, 不同幅度编码方式对测距准确性的影响, 并使用Matlab进行仿真。理论研究与仿真结果表明随着重频的提高, 最优编码中“1”的概率从1逐渐趋近于1/2, 1/2码的随机性最好, 探测效率高, 在时依然具有明显的峰值。在实际测距应用中, 根据不同的重频选择合适的编码方式, 可以优化测距算法, 提高测距效率。
Abstract
The extended pseudo-random encoding can solve the problem of the fuzzy distance, which is brought by high repetition frequency laser ranging in long target distance. But the extended pseudo-random coding methods are diverse. The effects of different amplitude encoding modes on the ranging accuracy are studied under different laser source repetition frequencies, and the Matlab simulation is carried out. The theory and simulation results show that the probability of "1" in optimal coding trends from 1 to nearly 1/2 with the increase of repetition frequency. When the probability is 1/2, the randomness is the best and the detection efficiency is high. The peak value is still obvious in weak noise environment. Therefore, in the practical application of distance measurement, choosing the appropriate coding method according to different repetition frequencies can optimize the ranging algorithm and improve the ranging efficiency.

陈雨, 羊毅. 基于单光子探测的不同重频下扩展伪随机编码规则[J]. 激光与光电子学进展, 2017, 54(5): 051204. Chen Yu, Yang Yi. Extended Pseudo-Random Coding Rules with Different Repetition Frequency Based on Single Photon Detection[J]. Laser & Optoelectronics Progress, 2017, 54(5): 051204.

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