Howtosignalprocessing
- What is the disadvantage of IIR filter?
- What makes IIR filter unstable?
- How do I know if my IIR filter is stable?
- What is IIR filter advantages and disadvantages?
What is the disadvantage of IIR filter?
The disadvantage of IIR filters is the nonlinear phase response. IIR filters are well suited for applications that require no phase information, for example, for monitoring the signal amplitudes. FIR filters are better suited for applications that require a linear phase response.
What makes IIR filter unstable?
(a) Stable IIR filter, (b) The same IIR filter becomes unstable due to rounding effects. , one poles lie exactly on the unit circle (ie, it is just out of the region of stability) and hence it is an unstable IIR filter.
How do I know if my IIR filter is stable?
The stability of an IIR filter can be analyzed by the zero-pole plot of the filter's transfer function. A digital filter is stable if and only if all the poles of the irreducible filter transfer function lie inside the unit circle in the z plane.
What is IIR filter advantages and disadvantages?
Advantages of IIR filter
It is easy to design. This filter is useful only when some analog filter is bandlimited. They are harder to implement using fixed-point arithmetic, such as noise generated by calculations and also limit cycles. They are more susceptible to the problem of line finite length arithmetic.
