Singh, R.P. Sapre, S.D. Communication systems : analog & digital /by R.P.Singh, S.D.Sapre - 2nd ed. - New Delhi Tata McGraw-Hill 2011 - xviii, 584 p. ISBN: 70634541 Subjects--Topical Terms: Communication system Digital signal Analog signalCommunication engineering Dewey Class. No.: 621.382 / SIN