FIR filter design and implementation meaning [closed]

1. How are FIR filters implemented?
2. What is FIR bandstop filter?
3. What is the reason that FIR filter is always stable?

How are FIR filters implemented?

An FIR filter can be easily implemented using just three digital hardware elements, a unit delay (a latch), a multiplier, and an adder. The unit delay simply updates its output once per sample period, using the value of the input as its new output value.

What is FIR bandstop filter?

"fir" — The function designs a minimum-order, linear-phase, finite impulse response (FIR) filter. To compensate for the delay, the function appends to the input signal N/2 zeros, where N is the filter order. The function then filters the signal and removes the first N/2 samples of the output.

What is the reason that FIR filter is always stable?

In contrast, FIR filters are always stable because the FIR filters do not have poles. You can determine if pole-zero pairs are close enough to cancel out each other effectively. Try deleting close pairs and then check the resulting frequency response.