摘要
在TDOA(time difference of arrival)目标模拟系统中,采用微波光子链路传输包含精确TDOA信息的多路多频段目标模拟信号,为保证TDOA信息的精度足够高,需要精确测量目标模拟信号经过光子链路的传输延时。从特定工程应用角度提出一种光子链路传输延时测量方法,通过专用延时测量芯片实现传输延时高分辨率、高精度测量,通过延时测量信号和目标模拟信号分时占用单根光纤的相同光传输波道,实现光子链路传输延时测量和目标模拟信号传输分时工作,从机理上满足了精确测量光子链路传输延时所需硬件条件。试验结果:表明该方法可精确测量目标模拟信号经过光子链路的传输延时,测量误差小于1 ns,比传感器的TDOA测量精度高一个数量级,满足系统对光子链路传输延时的测量精度要求。
In the TDOA target generation system,microwave photon links are used to transmit multichannel and multi-band target simulation signals containing accurate TDOA information.To ensure the accuracy of TDOA information is enough,it is necessary to accurately measure the propagation delay of the target simulation signal through the photon link.A novel method for measuring the propagation delay of photon link is proposed in this paper,which uses a dedicated delay measurement chip based on the gate delay counting principle to achieve high-resolution and high-precision measurement.By occupying the same optical transmission channel of a single fiber through time sharing between the delay measurement signal and the target simulation signal,the measurement of the propagation delay and the transmission of the target simulation signal are achieved for a photon link,it meets the hardware requirements for accurately measuring the propagation delay of photon link mechanically.The experimental results show that this method can accurately measure the propagation delay of the TDOA target simulation signal through the photon link,with an error of less than 1ns,which is one order of magnitude higher than the TDOA measurement accuracy of the sensor,meets the measurement accuracy requirement of the system.
作者
吕强
王景国
钟珲
梁悦川
LÜ Qiang;WANG Jingguo;ZHONG Hui;LIANG Yuechuan(Beijing Institute of Electronic System Engineering,Beijing 100854,China;The 34th Research Institute of China Electronics Technology Group Corporation,Guilin 541004,China)
出处
《现代防御技术》
北大核心
2024年第5期73-79,共7页
Modern Defence Technology
关键词
到达时差
目标模拟
光子链路
传输延时
延时测量
门延迟计数
time difference of arrival(TDOA)
target simulation
photon link
propagation delay
delay measurement
gate delay counting
作者简介
第一作者:吕强(1990-),男,内蒙古鄂尔多斯人。工程师,硕士,研究方向为探测制导与电子对抗总体设计;通讯作者:王景国(1979-),男,河南兰考人。高工,本科,研究方向为微波光子技术。
