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## Homework Statement

Given a ramp function x(t) = t*heaviside(t) with the known z-transform ( z / (z-1)^2 ).

If the time-domain signal has been delayed by 2 seconds, then sampled with an unknown sampling rate (T). How could I get the z-transform (one-sided) for the discrete signal, for any values of T ?

I guess my question is really how to express that delay in the Z-domain. I have searched a lot and couldn't find any good resources.

## Homework Equations

original signal : x(t) = t*heaviside(t) - X(z) = z / (z-1)^2

delayed signal: x(t) = (t-2)*heaviside(t-2) - X(z) = ?

## The Attempt at a Solution

I have been trying a lot with this problem. The last (and seemingly to me) the closest I've got is :

X(z) = T*( z / (z-1)^2 )*(z^-s)

where :

s = 2/T if T < 1

s = 2*T if 1<= T < 2

s = T if T >= 2

Of course, if s turns out to be a non-integer value, the solution would be wrong.

Any help on that is greatly appreciated.

Regards,

MT

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