电讯技术2025，Vol.65Issue(5)：740-748,9.DOI:10.20079/j.issn.1001-893x.240629001
运动多站对捷变频信号时差和速度差时变性补偿与测量
Compensation and Measurement for Time-varing TDOA and VDOA of Agile Frequency Signal in Moving Multi-station Systems
摘要
Abstract
For the problem of high-precision measurement of time difference of arrival(TDOA)and frequency difference of arrival(FDOA)of agile frequency signal in moving multi-station observation scenarios,the authors propose a method of rapid compensation and measurement of TDOA based on least squares,and a method of compensation and measurement of velocity difference of arrival(VDOA)based on cross ambiguity function(CAF).Firstly,the theoretical mechanism of TDOA and VDOA multi-station observation scenarios is analyzed.Then,according to the spatial position and relative motion relationship between the observation station and radiation source,the theoretical model of the view measurement of TDOA change rate and VDOA change rate is derived.Finally,the mathematical model of the agile frequency signal TDOA and VDOA is established,the quantitative analysis of the time-varing influence of TDOA and VDOA is carried out,and the method of time-varing compensation and high-precision measurement of agile frequency signal TDOA and VDOA is proposed.The computer simulation verifies the effectiveness of the proposed method.When the signal accumulation time reaches 1 s,the measurement accuracy of TDOA is better than 12 ns(r.m.s),the measurement accuracy of VDOA is better than 0.001 35 m/s(r.m.s).关键词
捷变频信号/时差(TDOA)估计/速度差(VDOA)估计/时变特性/互模糊函数Key words
agile frequency signal/time difference of arrival(TDOA)estimation/velocity difference of arrival(VDOA)estimation/time-varing feature/cross ambiguity function分类
信息技术与安全科学引用本文复制引用
陈云飞,杨光,郑泽星,周彬,田玉坤..运动多站对捷变频信号时差和速度差时变性补偿与测量[J].电讯技术,2025,65(5):740-748,9.基金项目
国家自然科学基金联合基金(U21A20455) （U21A20455）
