00538nam a2200181Ia 4500008004100000020001800041022001500059040001300074082001600087100001800103245006400121250001100185260002600196300002700222500005000249650002700299650003000326191130s2014##################000#0#eng##  a9789332518582  a2011038659  aACLcACL  a621.382 COU  aCouch, Leon W  aDigital and analog communication systemscLeon W. Couch, II  a8th ed  aNoidabPearsoncc2014  a676 p. : ill. ; 24 cm.  aIncludes bibliographical references and index  aDigital communications  aTelecommunication systems