What are the limitations of FIR 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.

1. Which of the following is disadvantage of FIR?
2. What are the undesirable features of FIR filters?
3. Can FIR filters be unstable?

Which of the following is disadvantage of FIR?

MATLAB, GNU Octave, and Scilab software are used for designing filters. The advantages of the FIR filter include linear phase, ease in the implementation, and represent values in fractional arithmetic. The disadvantages of the FIR filter include high storage space, more delay, and difficulty in implementation.

What are the undesirable features of FIR filters?

Quantization Noise can be made negligible in FIR filters. Due to this sharp cutoff FIR filters can be easily designed. 4. Disadvantage of FIR filters is that they need higher ordered for similar magnitude response of IIR filters.

Can FIR filters be unstable?

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.