Causality Condition of a Discrete-Time LTI System Let xi[n] and x2In]be two input sequences i[]=x2n]forn≤no The corresponding output samples at n=n of an lti system with an impulse response thin are then given by Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 6 Causality Condition of a Discrete-Time LTI System • Let and be two input sequences with • The corresponding output samples at of an LTI system with an impulse response {h[n]} are then given by x [n] 1 x [n] 2 x [n] x [n] 1 = 2 n  no for n = no