00431nam a2200157Ia 4500008004100000020001800041082001600059100001900075245004500094250000800139260004200147300002300189500001900212600002700231650001500258240925s9999    xx            000 0 und d  a9788131725436  a621.382 COU  aCouch ,Leon W. 0aDigital and Analog Communication Systems  a7th  aNew Delhi:bPearson Educationc,2010.  a262p.b0fOriginal  aIncludes Index  aElectronic Engineering  aTechnology