Can I compute my IIR faster given limited possible input values?

1. Why FIR is faster than IIR?
2. What is the duration of the unit sample response of a digital IIR filter?
3. How do you define IIR filters term as infinite?
4. What are the different techniques available for the design of IIR filters?

Why FIR is faster than 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.

What is the duration of the unit sample response of a digital IIR filter?

1. What is the duration of the unit sample response of a digital filter? Explanation: Digital filters are the filters which can be designed from analog filters which have infinite duration unit sample response.

How do you define IIR filters term as infinite?

The infinite impulse response (IIR) filter is a recursive filter in that the output from the filter is computed by using the current and previous inputs and previous outputs. Because the filter uses previous values of the output, there is feedback of the output in the filter structure.

What are the different techniques available for the design of IIR filters?

There are three main methods of transformation, the impulse invariant method, the backward difference method, and the bilinear z-transform.