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Using IDL: Signal Processing |
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Digital filters can be implemented on a computer to remove unwanted frequency components (noise) from a sampled signal. Two broad classes of filters are Finite Impulse Response (FIR) or Moving Average (MA) filters, and Infinite Impulse Response (IIR) or AutoRegressive Moving Average (ARMA) filters. Both of these classes of filters are described in the following sections:
| Note IDL's IR_FILTER function filters data with an infinite impulse response (IIR) or finite impulse response (FIR) filter. See IR_FILTER for more information. |
IDL Online Help (March 06, 2007)