基于DPPM的激光雷达通信测距一体化方案  

Lidar communication and ranging integrated solution based on DPPM

作　　者：曹明华[1] 邓浩 张悦 张霞[2,3] 姚瑞芳 CAO Minghua;DENG Hao;ZHANG Yue;ZHANG Xia;YAO Ruifang(School of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,China;School of Physics Science and Information Engineering,Liaocheng University,Liaocheng Shandong 252000,China;Shandong Provincial Key Laboratory of Optical Communications Science and Technology,Liaocheng Shandong 252000,China)

机构地区：[1]兰州理工大学计算机与通信学院,兰州730050 [2]聊城大学物理科学与信息工程学院,山东聊城252000 [3]山东省光通信科学与技术重点实验室,山东聊城252000

出　　处：《光通信技术》2024年第5期1-7,共7页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:62265010)资助;甘肃省科技计划(批准号:24JRRA183)资助;山东省自然科学基金(批准号:ZR2022MF284)资助。

摘　　要：针对激光雷达系统建设成本高和测量精度低的问题,提出了一种基于差分脉冲位置调制(DPPM)的激光雷达通信测距一体化方案。该方案通过使用DPPM的不同脉冲时隙位置来表示通信和测距帧信息。接收机可以根据脉冲时隙位置解调出通信信号,并通过飞行时间测距模块实现测距功能。此外,为了应对回波信号的低信噪比(SNR)问题,使用脉冲累加算法对回波信号进行组帧处理以提高回波信号的SNR。最终,通过现场可编程门阵列(FPGA)搭建了该通信测距一体化系统并进行了测试。实验结果表明:该系统不仅能在300 cm的范围内实现平均测距误差为±2.04 cm的测距功能,而且还能同时达到5 Mb/s的通信速率。To address the issues of high construction costs and low measurement accuracy in lidar systems,a lidar communication and ranging integrated solution based on differential pulse position modulation(DPPM)is proposed.This scheme uses different pulse slot positions in DPPM to represent communication and ranging frame information.The receiver can demodulate the communication signals based on the pulse slot positions and achieve ranging using a time-of-flight ranging module.Additionally,to address the issue of low signal-to-noise ratio(SNR)in echo signals,a pulse accumulation algorithm is used to frame the echo signals and improve their SNR.Finally,the integrated communication and ranging system is built by field programmable gate array(FPGA)and tested.The experimental results show that the system can not only achieve a range of 300 cm with an average ranging error of ±2.04 cm,but also achieve a communication rate of 5 Mb/s.

关 键 词：差分脉冲位置调制 激光雷达 通信测距一体化 飞行时间法 

分 类 号：TN929[电子电信—通信与信息系统]