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Signals and Systems by Smarajit Ghosh

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6.10 z-TRANSFORM OF FOLDED UNIT STEP SEQUENCE

The folded unit step sequence can be represented by

 

image

 

The z-transform of unit step sequence is given by

 

image

 

Using the time reversal property of z-transform we can write that

 

image

 

Therefore, the z-transform of u(−n) using the above property we can write

 

image

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