instructor: prof. s. mann
textbook: oppenheim and schafer, discrete time signal processing, 2nd ed., prentice hall, 1998
you can get from the bookstore (wearcomp /usr/local/bin/bookstore), where there should be 97 copies in the bookstore now, plus some used copies since i also asked bookstore staff to list ece431 in their buyback program:
an additional reference that you may find useful: proakis and manolakis, introduction to digital signal processing, mcmillan, 1988