00293nam a2200109Ia 4500008004100000100002300041245004200064260002600106260000900132300000800141650003400149221231s9999    xx            000 0 und d  aShanmugan,  Sam K 0aDigital Analog  communication system  bJohn  Wiley and Sons  c1985  a600  aElectronics and Communication