00804nam0-22003011i-450-99000051777040332120100118122350.00-13-599028-9000051777FED01000051777(Aleph)000051777FED0100005177720020821d1997----km-y0itay50------baengy-------001yyDigital and analog communication systemsLeon W. Couch5th ed.Englewood CliffsPrentice-Hall©1997XXV,742 p.24 cmComunicazioni digitali621.382Couch,Leon W.ITUNINARICAUNIMARCBK99000051777040332110 E II 538DE 1472DINELDINELUNINA