E-books below are free to download. Just click on the link given and skip ad after waiting for five seconds.
MATLAB Books - Signals & Systems Computing & Simulink Modeling by Steven T. Karris
Schaum's Outline Electronic Communication, Second Edition by
Lloyd Temes and Mitchel E. Schultz
Digital Communications 4th Ed by John G. Proakis
Signals and Systems 2ed by A.V.Oppenheim, A.S.Willsky - Prentice Hall
