TY  - BOOK
AU  - Haykin, Simon 
TI  - An introduction to analog and digital communications 
SN  - 81-265-0932-5 
U1  - 621.382 HAY  
PY  - 2007///
CY  - John wiley amd sons 
PB  - New York 
KW  - COMMUNICATION SYSTEM
ER  -