00498nam a22001217a 4500020002400000082001700024100002100041245004500062260004700107300003400154500002000188650016800208  a9788120308503 (pbk)  a621.382bROD  aRoden, Martin S.  aAnalog and digital communication systems  aNew DelhibPHI Learning Private Ltd.c1991  axvi, 505 p.b: ill.c; 24 cm.  aIncludes index.  aTelecommunication systemsaDigital communicationvData transmissionvAmplitude modulationvDesign considerationsvSecure communicationsvFrequency modulationvFEAS