Consider an LTI system whose frequency response is H(e j ) = e j /2 , ||

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Consider an LTI system whose frequency response is 

H(e) = e–j ω/2,             |ω| < π.

 Determine whether or not the system is causal. Show your reasoning.

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Discrete Time Signal Processing

ISBN: 978-0137549207

2nd Edition

Authors: Alan V. Oppenheim, Rolan W. Schafer

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