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Unformatted text preview: mum frequency m . This corresponds to cos( m k ) = (-1) k . What is the value of m ? d. Why is the phase (shift) H ( i ) of a continuous-time physical system typically negative for positive frequency > 0? Hint: You may use some of the following words: delay, advance, causal, anticipatory. e. Consider a discrete-time system with a transfer function H ( z ). Suppose that the input to the system is given by u ( k ) = A cos( k )1( k ). Find the steady-state output y ss ( k )....
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- Spring '09