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autocorrelation

n. (context statistics signal processing English) The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.

Wikipedia
Autocorrelation

Autocorrelation, also known as serial correlation, is the correlation of a signal with itself at different points in time. Informally, it is the similarity between observations as a function of the time lag between them. It is a mathematical tool for finding repeating patterns, such as the presence of a periodic signal obscured by noise, or identifying the missing fundamental frequency in a signal implied by its harmonic frequencies. It is often used in signal processing for analyzing functions or series of values, such as time domain signals.

Unit root processes, trend stationary processes, autoregressive processes, and moving average processes are specific forms of processes with autocorrelation.

Usage examples of "autocorrelation".

Thoth missiles depended on a direct line of sight communication, and employed an autocorrelation system that was nearly impossible to jam, even with brute force.