Research and implementation of continuous wave radar ranging method based on tri-frequency  

作　　者：袁其平 Fan Lijieare Tong Zhengrong Yang Xiufeng Cao Ye 

机构地区：[1]School of Electronics Information Engineering,Tianjin University of Technology [2]Key Laboratory of Film Electronics and Communication Devices and Key Laboratory of Intelligent Computing and Novel Software Technolgy,School of Computer and Communication Engineering,Tianjin University of Technology

出　　处：《High Technology Letters》2014年第2期111-116,共6页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.61107052);the National Natural Science Foundation of Tianjing(No.11JCYBJC00100)

摘　　要：In the traditional dual-frequency radar ranging system,there is a contradiction between ranging precision and ranging distance.So a tri-frequency ranging method is proposed.The principle of the tri-frequency ranging is that the distance can be achieved by transmitting the three frequencies and then measuring the three phase difference and calculating the number of wavelength.What's more,range ambiguity will not occur within a certain distance.The experimental results show that,if the waveband is 0.47 ~0.57 m,the measurement of unambiguous distance of 25 ~500m can be realized.If the wavelength tolerance error is less than ± 10^(-7) and the phase error is less than ± 10^(-3),the precision of the distance ranging can reach 10^(-6).In the traditional dual-frequency radar ranging system, there is a contradiction between ranging precision and ranging distance. So a tri-frequency ranging method is proposed. The principle of the tri-frequency ranging is that the distance can be achieved by transmitting the three frequencies and then measuring the three phase difference and calculating the number of wavelength. What＇ s more, range ambiguity will not occur within a certain distance. The experimental results show that, if the waveband is 0.47 -0.57m, the measurement of unambiguous distance of 25 -500m can be realized. If the wavelength tolerance error is less than ± 10^-7 and the phase error is less than ± 10 ^-3, the precision of the distance ranging can reach 10^-6.

关 键 词：tri-frequency RANGING SNR phase error wavelength error 

分 类 号：TN953.2[电子电信—信号与信息处理]