Consider the following statements regarding FIR (finite impulse response) digital filters:
1. They have finite memory and therefore, any transient start-up is of limited duration.
2. They are always BIBO stable.
3. The transfer function of an FIR digital filter is a rational function in z-1.
Which of the above statements is/are correct?
1
1 & 2 only
2
1 & 3 only
3
2 & 3 only
4
1, 2 and 3.