Find the autocorrelation function of the signal u(t u(t 2))

1. What is autocorrelation of a signal?
2. Which function is autocorrelation?
3. What is autocorrelation function in DSP?

What is autocorrelation of a signal?

Autocorrelation, sometimes known as serial correlation in the discrete time case, is the correlation of a signal with a delayed copy of itself as a function of delay. Informally, it is the similarity between observations of a random variable as a function of the time lag between them.

Which function is autocorrelation?

The autocorrelation function is a statistical representation used to analyze the degree of similarity between a time series and a lagged version of itself. This function allows the analyst to compare the current value of a data set to its past value.

What is autocorrelation function in DSP?

Autocorrelation is useful for finding repeating patterns in a signal, such as determining the presence of a periodic signal which has been buried under noise, or identifying the missing fundamental frequency in a signal implied by its harmonic frequencies.