Causality Condition of a Discrete-Time LTI System Example- The factor-of-2 interpolator defined by nt +x,uln+ is noncausal as it has a noncausal impulse response given hn]}={0.510.5 12 Copyright C 2001, S.K. MitraCopyright © 2001, S. K. Mitra 12 Causality Condition of a Discrete-Time LTI System • Example - The factor-of-2 interpolator defined by is noncausal as it has a noncausal impulse response given by [ ] [ ] ( [ 1] [ 1]) 2 1 y n = xu n + xu n − + xu n + {h[n]} ={0.5 1 0.5} 