As an introduction to signals, The Scientist and Engineer's Guide to Digital Signal Processing is pretty good(http://dspguide.com/ http://dspguide.com/) you sho

As an introduction to signals, The Scientist and Engineer's Guide to Digital Signal Processing is pretty good(http://dspguide.com/ http://dspguide.com/) you should also read this woman's blog http://www.windytan.com/ http://www.windytan.com/