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...
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...
A processor cross-correlates the first combined segment and the second combined segment into a cross-correlation result, which is written into a cross-correlation array. The result may be used for delay estimation (to estimate the relative delay between the two audio signals.) Other aspects are ...
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 (...
1) cross-correlation estimation 相关法估计2) correlation estimation algorithm 相关估计算法 1. i software workbench,A program to use correlation estimation algorithm is 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...
The Generalized cross-correlation (GCC) method is most commonly used for time delay estimation (TDE). However, the GCC method can result in false peak errors (FPEs) especially at a low signal to noise ratio (SNR). These FPEs significantly degrade TDE, since the estimation error, which is...
The acoustic source localization is usually accomplished by time delay of arrival of microphone arrays, and the precision and robust of time-delay algorithms is very important. Generalized cross correlation often used in time -delay estimation is studied in detail and simulated with different weight ...
The problem of estimating time delay by cross correlation methods is reexamined for the whole class of stationary signals. Expressions are derived for the estimation mean square error (MSE) by the cross correlation method, and are shown to be identical to previously published results for Gaussian ...
1.Aiming at the problem of dynamic flow measurement,indirect soft measurement is exposed in laminar state,which is based on ultrasonic when transmitted in the liquid containing velocity signal of liquid and pressure cross-correlation method that manage coefficient.针对存在的问题,利用超声波在流体中传播...
Time Delay Estimation in Underwater Environment using Cross-Correlation Based Techniques In this paper, we analyzed the time difference of arrival (TDOA) of acoustic sounds in an underwater environment. TDOA estimation accuracy can be greatly i... F Talebpour,M Saif,H Amiri,... - 《Internation...