3/11/08
quiz explanation (Fig1)
done by trig identity
chapter 11 homework assignment: read 11.1, do problems 11.1-1abc, 11.1-2a, 11.1-3adf, 11.1-5
quiz thursday on DTFT

z-transform
F[z] sum<n=-inf,inf>(f[n]z^(-n))
f[n]=1/2pij * int<contour>(F[z]z^(n-1)) -> table lookup and other techniques
x[n] = z^n <- everlasting exponential
y[n] = x[n]*h[n] = h[n]*z^n <- convolution
     = sum<m=-inf,inf>(h[m]z^(n-m)) = z^n*sum<m=-inf,inf>(h[m]z^(-m)) = z^(n)H[z]
     H[z] = output signal/input signal

find some z transforms (Fig2)
IZT is an integral in the complex plane, but there are other ways to solve such as a table lookup, partial fraction expansion, and long division

find inverse z transform (IZT) (Fig3)