J.G. Proakis and D.G. Manolakis: Digital Signal Processing. Principles, Algorithms, and Applications, 4th international edition, Prentice–Hall, 2007. Available at KF at a price of about 600 SEK. Note that this book is identical to the one used in the fundamental signal processing course.
Lecture notes, solutions manual, and laboratory notes as well as other material are available for download on this web site.