An Introduction to Digital Signal Processing by J. H. Karl
Publisher: Academic Press 1989
ISBN/ASIN: 0123984203
The book comprises a one-semester or self-study course, filling the gap between several oversimplified introductions and more topically specialized or formal treatments. Karl's book wins notable points for its easy reading style and its between-the-lines historical awareness. It assumes almost no prior DSP background and the only prerequisites are basic calculus, matrix algebra, and complex variables.
Engineering Electrical Engineering Signal Processing