Howtosignalprocessing
- What is the frequency response of a moving average filter?
- What is the effect of the moving average filter?
- What will be the response of a moving average filter of an impulse response?
What is the frequency response of a moving average filter?
Frequency Response of the Running Average Filter
H(ω) = (1/L) (1 − e− jω L)/(1 − e− jω).
What is the effect of the moving average filter?
Of all the possible linear filters that could be used, the moving average produces the lowest noise for a given edge sharpness. The amount of noise reduction is equal to the square-root of the number of points in the average. For example, a 100 point moving average filter reduces the noise by a factor of 10.
What will be the response of a moving average filter of an impulse response?
The moving average filter has an impulse response = rectangular function rect(.). From Lecture 3, slide 6, we have learned that the Fourier transform of a rectangular function is of the form of sin(x)/x, (or sinc(x)). Shown here is the frequency response of the moving average filter for different number of taps.
