Design finite impulse response filters with linear phase
Finite Impulse Response: The output depends only on a finite number of input samples. The impulse response has finite duration.
Linear Phase: Symmetric FIR filters have exactly linear phase, meaning all frequencies are delayed by the same amount - no phase distortion.
Always Stable: FIR filters have no feedback (no poles), so they cannot become unstable.
Trade-off: Higher order (more taps) gives sharper transitions but increases computation and delay.