传感技术学报2025，Vol.38Issue(3)：468-476,9.DOI:10.3969/j.issn.1004-1699.2025.03.013
基于VMD和广义延拓逼近的时间差估计算法
Time Difference Estimation Algorithm Based on VMD and Generalized Extended Approximation
摘要
Abstract
Since the peak value of the correlation function envelope of the correlation class time difference estimation algorithm fluctuates greatly in the case of low signal-to-noise ratio,thus seriously affecting the accuracy of time difference estimation,a time differ-ence estimation algorithm based on variational modal decomposition and generalized extended topological approximation is proposed.The algorithm is optimized from three aspects,namely,the signal receiving side,the signal processing side and the peak value of the correla-tion function.At the signal receiving end,the received signal is noise-reduced by using the variational modal decomposition and wavelet threshold noise reduction respectively.At the signal processing end,the correlation function envelope is obtained by using the general-ized quadratic correlation method.Finally,the spectral peaks of the correlation function envelope are interpolated by using the general-ized extended approximation method.The experimental results show that the root mean square error of the proposed algorithm is much smaller than that of the generalized quadratic correlation method.关键词
无源定位/时差估计算法/广义二次互相关/变分模态分解/小波阈值降噪/广义延拓逼近法Key words
passive location/time difference estimation algorithm/generalized second cross-correlation/VMD/wavelet threshold noise reduction/generalized extended approximation method分类
电子信息工程引用本文复制引用
肖江宁,尚俊娜,霍刚..基于VMD和广义延拓逼近的时间差估计算法[J].传感技术学报,2025,38(3):468-476,9.基金项目
浙江省教育厅科研项目资助(Y202044275) （Y202044275）
政策引导类计划(国际科技合作)——"一带一路"创新合作项目(BZ2019006) （国际科技合作）
