FIR filter window method [duplicate]

1. What is windowing technique in FIR filter?
2. What are the disadvantages of fir?
3. What is window function in filter design?
4. What are the techniques of designing FIR filters?

What is windowing technique in FIR filter?

Windowing is the simplest technique for designing FIR filters because of its conceptual simplicity and ease of implementation. Designing FIR filters by windowing takes the inverse FFT of the desired magnitude response and applies a smoothing window to the result. The smoothing window is a time domain window.

What are the disadvantages of fir?

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.

What is window function in filter design?

Windows are sometimes used in the design of digital filters, in particular to convert an "ideal" impulse response of infinite duration, such as a sinc function, to a finite impulse response (FIR) filter design. That is called the window method.

What are the techniques of designing FIR filters?

(i) A desired or ideal response is chosen, usually in the frequency domain. (ii) An allowed class of filters is chosen (e.g. the length N for a FIR filters). (iii) A measure of the quality of approximation is chosen. (iv) A method or algorithm is selected to find the best filter transfer function.