Which FIR filter should I choose?

1. How do I choose a window for FIR filter?
2. How do you choose FIR and IIR filter?
3. How do you analyze in selecting the type of filter IIR FIR for an application?

How do I choose a window for FIR filter?

1) Window Type

We need to choose the peak approximation error of the design based on the minimum of δ1 and δ2 . Hence we obtain δ=minδ1,δ2=0.001 δ = m i n δ 1 , δ 2 = 0.001 . The Blackman is the only window in Table I which can provide a peak approximation error smaller than −60dB − 60 d B .

How do you choose FIR and IIR filter?

If the impulse response of the filter falls to zero after a finite period of time, it is an FIR (Finite Impulse Response) filter. However, if the impulse response exists indefinitely, it is an IIR (Infinite Impulse Response) filter.

How do you analyze in selecting the type of filter IIR FIR for an application?

FIR filters provide perfect linear phase characteristic in the passband region (Figure 5) and hence avoids phase distortion. All IIR filters provide non-linear phase characteristic. If a real-time application warrants for zero phase distortion, FIR filters are the immediate choice for design.