Singh, R.P and Sapre, S.A. <br/><br/>
Communication systems :  analog and digital / 

 - 3rd. 
 - New Delhi,  McGraw Hill,  c2012. 
 - xix, 750p.   ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>9781259004605 
<br/><br/><label>Dewey Class. No.: </label>621.382