Howtosignalprocessing
- Which filter is better FIR or IIR?
- What is FIR decimation?
- Why FIR is more stable than IIR?
- What are the disadvantages of FIR filters compared to IIR filters )?
Which filter is better FIR or IIR?
The advantage of IIR filters over FIR filters is that IIR filters usually require fewer coefficients to execute similar filtering operations, that IIR filters work faster, and require less memory space. The disadvantage of IIR filters is the nonlinear phase response.
What is FIR decimation?
The FIR decimator (as shown in the schematic) conceptually consists of an anti-aliasing FIR filter followed by a downsampler. To design an FIR anti-aliasing filter, use the designMultirateFIR function. The FIR filter filters the data in each channel of the input using a direct-form FIR filter.
Why FIR is more stable than IIR?
Stability: As FIRs do not use previous output values to compute their present output, i.e. they have no feedback, they can never become unstable for any type of input signal, which is gives them a distinct advantage over IIR filters.
What are the disadvantages of FIR filters compared to IIR filters )?
The primary disadvantage of FIR filters is that they often require a much higher filter order than IIR filters to achieve a given level of performance. Correspondingly, the delay of these filters is often much greater than for an equal performance IIR filter.
