# Z-transform basic

Discussion in 'Homework Help' started by Anthony Quah, May 14, 2008.

1. ### Anthony Quah Thread Starter Active Member

Dec 1, 2007
80
0
hi guy,

need help to explain about Z-transform basic. I am currenty study Digital Signal Processing (DSP), please view the attachment..it will make it clearer..thanks

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2. ### Caveman Senior Member

Apr 15, 2008
471
1
Those values are the givens for the problem.

Each term is simply $x(k)\delta(k-n)$ for a given k. So for x(-2), the term is $x(-2)\delta(k-(-2)) = x(-2)\delta(k+2) = 1.5\delta(k+2)$, which is the first term in the answer.

You only have to write 6 terms because all of the others are given as zero.

3. ### mrmount Active Member

Dec 5, 2007
59
7
I think you ve misunderstood a bit. Are you asking how x(-2)=1.5, x(-1)=0.5, and so on ?
If so, it is just an example function x(k) with a value of 1.5 and 0.5 at -2 and -1 respectively. And it is just substituted in the equation as Caveman has ponited out.

4. ### Anthony Quah Thread Starter Active Member

Dec 1, 2007
80
0
thanks for the help..^^ i really didnt see it..