Tag: noise


Find the Periodicity of Noisy Data using Autocorrelation method in MATLAB

Autocorrelation (short ACF, autocorrelation function) is a cross-correlation of a signal with itself. By correlating a signal with itself, repetitive patterns will stand out and make it much easier to see. The (discrete) autocorrelation of a signal x is defined by the following simple equation. The entire signal x is shifted by an offset j and then multiplied by the original signal. This…
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Moving Average FIR Filter in MATLAB

As the name implies, the moving average filter operates by averaging a number of points from the input signal to produce each point in the output signal. In equation form, this is written: Where x[ ] is the input signal, y[ ] is the output signal, and M is the number of points in the…
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