Which of the following is generally true of Finite Impulse Response (FIR) filters?
Why An FIR filter with symmetric coefficients has exactly linear phase, which means its group delay is constant: every frequency component passing through is delayed by the same number of samples. That preserves waveform shape, which matters for data modes and pulse signals. This linear-phase property is the main reason FIR filters are chosen over IIR designs in SDR work.
Watch out The claims about easier implementation and faster impulse response actually describe IIR filters, which use feedback to get a steep rolloff with far fewer taps but at the cost of nonlinear phase.
FIR = Fixed delay for every frequency (linear phase). IIR = fewer taps, faster, but phase gets warped.