一种多目标雷达探测系统的设计与实现  

The Design and Implementation of a LFMCW Multi-Target Radar Detection System

作　　者：蒋留兵 宋占龙 车俐 JIANG Liubing;SONG Zhanlong;CHE Li(Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China;School of Computer and Information Security,Guilin University of Electronic Technology,Guilin 541004,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]广西无线宽带通信与信号处理重点实验室,广西桂林541004 [2]桂林电子科技大学计算机与信息安全学院,广西桂林541004 [3]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《雷达科学与技术》2019年第5期473-478,共6页Radar Science and Technology

基　　金：国家自然科学基金(No.61561010);广西自然科学基金(No.2017GXNSFAA198089);广西重点研发计划项目(No．桂科2017AB03075,AB16380316);桂林电子科技大学研究生科研创新项目(No.2018YJCX21)

摘　　要：针对传统汽车防撞雷达系统中存在的多目标配对问题,基于单发双收射频前端研究了一种线性调频连续波(LFMCW)多目标探测系统。首先理论推导了系统测距测速原理,并在测距测速的基础上增加测角功能;然后根据LFMCW上下扫频中同一目标的角度一致性和峰值能量相近原则对目标进行容差配对,从而实现单周期目标距离速度和角度的准确测量;最后给出多目标雷达探测系统的硬件框图和FPGA信号处理流程,并对该系统进行实测验证。实测结果表明,该系统能够准确地实现目标方位角的测量并有效解决了LFMCW多目标配对问题。Aiming at the multi-target pairing problem in the traditional automobile anti-collision radar system,a linear frequency modulated continuous wave (LFMCW) multi-target detection system is studied based on the single-shot dual-receiver RF front-end.Firstly,the principle of distance measurement and velocity measurement of the system is deduced theoretically,and the angle measurement function is added on the basis of distance measurement and velocity measurement.Then the target tolerance pairing is performed according to the angle consistency and peak energy of the same target in the LFMCW upper and lower frequency sweeps.So the distance,speed and angle of target can be measured correctly.Finally,the hardware block diagram of multi-target radar detection system and FPGA signal processing flow are given,and the system is tested and verified.The measured results show that this system can accurately achieve the target azimuth measurement and effectively solve the LFMCW multi-objective pairing problem.

关 键 词：线性调频连续波(LFMCW) 多目标探测 容差配对 方位角 现场可编程门阵列(FPGA) 

分 类 号：TN957.51[电子电信—信号与信息处理]