Communication systems 
Haykin, Simon. 
 - Fourth edition. 
 -  John Wiley and Sons.  2001 
 - xviii, 816 pages. 
9-97151305-6
Signal theory (Telecommunication)
621.382 H33c 2001
                        9-97151305-6
Signal theory (Telecommunication)
621.382 H33c 2001