互相关(cross-correlation)的本质在于度量两个信号或时间序列之间的相似性。具体来说,它衡量一个信号相对于另一个信号的延迟(shift)时的相似程度,通过滑动并计算两个信号之间的点积来得到。在信号处理和数据分析中,互相关可以帮助识别两个信号是否存在某种相关性或同步关系。 本质 互相关可以看作是计算一个信号如何通...
On the application of cross correlation function to subsample discrete time delay estimation. Digit. Signal Process. 16, 682-694. https://doi.org/ 10.1016/j.dsp.2006.08.009.L. Zhang, X. Wu, "On the application of cross correlation function to subsample discrete time delay estimation", ...
可以看出,在已知声速和阵元间距的条件下,要计算出声源的方向角度,需要计算得知两个麦克风接收到的声波信号的时间差,这一步计算称为「时延估计」(Time-Delay Estimation,TDE)。 二、时延估计的互相关算法 「时延估计」最简单的算法就是直接互相关方法(Cross-Correlation,CC),两个麦克风输出信号之间的互相关函数(Cross...
Time delay estimation methods (TDE) are well-known techniques to investigate poloidal flows in hot magnetized plasmas through the propagation properties of turbulent structures in the medium. One of these methods is based on the estimation of the time lag at which the cross-correlation function (...
Define the cross-correlation function between two signals in the time domain and in the frequency domain. Rx1,x2(τ)Rx1,x2(ω)=E[x1(t)x2(t−τ)]=X1(ω)X∗2(ω)=α∣S(ω)∣2ejωτ To identify the time delay, locate the peak of the cross-correlation functionτmax. When th...
美 英 n.〔数〕相关 网络互相关;交叉相关;互相关性 英汉 网络释义 n. 1. 〔数〕相关 释义: 全部,〔数〕相关,互相关,交叉相关,互相关性
2) correlation estimation algorithm 相关估计算法 1. i software workbench,A program to usecorrelation estimation algorithmis designed. i软件平台,采用相关估计算法,设计了VI程序,利用VI程序辨识了微弱信号中的工频噪声(或以工频为整倍数的噪声),从而消除了工频噪声干扰。
A new time-delay estimation method based on the combination of wavelet transform and cross-correlation is proposed. This method uses compromise threshold function and Birge-Massart threshold selection strategy to denoise signals, and then determines the time-delay...DOI...
Leak location is realized bymutual correlation time delay estimationwith fast correlation algorithm, and the feasibility of the system is verified by simulating it under the environment of CCS. 文中介绍了地下管道泄漏点定位原理及系统软硬件的设计方案;在MATLAB平台上根据系统需要设计IIR滤波器有关参数,并在...
The problem of TDOA estimation of wideband signal is considerd.The signal model of TDOA estimation is given,the cyclostationarity of wideband signal is analyzed and a TDOA estimation method based on the cyclic cross-correlation amplitude is constructed.Finally,the performance of the estimator is given...