Sunday 30 August 2015

DSP Tech Brief : One-Pole Filters

One-pole filters are very useful and efficient techniques for filtering signals. The feedback a value can also be used to design efficient peak-hold filters in the time-domain and are also used in power spectrum analysers and can help extract features of the signals that we are analyzing.

The following equation defines the one-pole filter :

y(n) = x(n) - a * y(n-1), 0 < a < 1.0

The single coefficient defines the gain and time-constant of the filter as follows :

Time constant :

Gain :

This algorithm is included in the SigLib DSP Library.

If you have found this solution useful then please do hit the Google (+1) button so that others may be able to find it as well.
Numerix-DSP Libraries :

No comments:

Post a Comment