# Lecture 7 Blog, ECE438 Fall 2010, Prof. Boutin

Wednesday September 8, 2010.

In Lecture #7, we talked about convergence of the z-transform at infinity. We also talked about the time-shifting property of the z-transform. Finally, we gave an explicit formula for the inverse z-transform, and described a straightforward procedure for computing it using power series. If you do not feel completely comfortable with the geometric series, this is a good time to brush up on the subject.

Related Rhea pages (please feel free to comment/discuss directly on these pages):

- Some tricks to deal with the geometric series (from William Schmidt)
- Yes, the geometric series also holds for complex numbers!
- Be careful if the argument is equal to one!!!
- Please consider writing a page on the geometric series! (You will get up to 0.5% bonus points for doing so, depending on the quality/content.)

The third homework is due next Wednesday. It basically consists in computing the inverse z-transforms of the signal you used in HW2 and in doing the peer review of HW2.

Did everybody hand in their homework 2 in the "Assignment 2" box in Prof. Mimi's dropbox? Note that this is NOT the same as Prof. Mimi's dropbox.

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