For an LTI discrete system to be stable, the square sum of the impulse response should be
A. Integral multiple of 2pi
B. Infinity
C. Finite
D. Zero
Answer:A
For an LTI discrete system to be stable, the square sum of the impulse response should be
A. Integral multiple of 2pi B. Infinity C. Finite D. Zero
Explanation: If the square sum is infinite, the system is an unstable system. If it is zero, it means h(t) = 0 for all t. However, this cannot be possible. Thus, it has to be finite.