基于改进Rife算法的LFMCW雷达测距方法及实现  

Ranging method of LFMCW radar based on improved Rife algorithm and its implementation

作　　者：于卫东[1] 涂亚庆[1] 詹启东[1] 沈艳林[1] 

机构地区：[1]后勤工程学院,重庆401311

出　　处：《电子测量与仪器学报》2015年第4期550-557,共8页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(61271449;61302175);重庆市自然科学基金(CSTC2011BA2015;CSTC2012jj A40006);重庆市研究生科研创新项目(CYB14100)资助项目

摘　　要：为提高线性调频连续波(LFMCW)雷达测距精度,提出一种基于改进Rife算法的雷达测距方法。首先介绍了方法原理,并理论分析了方法的测距性能;其次,结合以FPGA EP3C55F484C8N为核心芯片的线性调频连续波雷达,探索了方法实现,并就方法实现的关键点之一——实数点处的DFT计算给出流程;然后,通过Quartus II进行时序仿真,结果显示所提方法可行;最后,利用线性调频连续波雷达实验平台进行现场测距验证,整个距离段上,系统可进行高精度测距,与现有实际测距方法相比,精度更高,稳定性更好,证明了方法的有效性。In order to improve the ranging accuracy of Linear Frequency Modulated Continuous Wave radar, a ranging method of radar based on improved Rife algorithm was proposed.Firstly, the basic principle of method was intro-duced, and the ranging performance of method was analyzed theoretically.Secondly, combining the Linear Frequency Modulated Continuous Wave radar using FPGA architecture, the realization method was explored, and the real point of the DFT calculation, which is one of the key points, was exhibited.Then, the results of timing simulation by Qu-artus II showed that the method was feasible.Finally, the field ranging experiment by Linear Frequency Modulated Continuous Wave radar was conducted, the system could carry out high precision ranging in the whole distance sec-tion, it had higher accuracy and better stability than the existing ranging method, and the results validated the effec-tiveness of the proposed method.

关 键 词：Rife LFMCW 雷达测距 FPGA 

分 类 号：TN959.1[电子电信—信号与信息处理]