Correlater
Correlater is a noun meaning a person or thing that establishes or measures correlation between two or more variables or signals. The form correlator is far more common in technical literature, but correlater may appear as a variant or in informal usage. In statistics, a correlator (or correlater) can refer to software or a component that computes correlation coefficients, such as Pearson's r, Spearman's rho, or Kendall's tau, to quantify the strength and direction of associations between data sets.
In signal processing, the term correlator is standard for a device or algorithm that computes the cross-correlation
Interpretation and limitations: A high correlation indicates a strong linear relationship but does not imply causation;
Related terms: correlation, cross-correlation, autocorrelation, matched filter, data analysis, statistics.