A system is defined by its impulse response [ ] 2 2 ( ) n h n u n = − . Discuss whether the system is stable, causal, or unstable and non-causal? Support your answer? (5)
A system is defined by its impluse response . The system is instable and non-casual
Therefore the system is not stable.
A discrete-time LTI system is casual if and only if h(n) =0, n<0
For the given impulse response we have