METHOD AND MODEM FOR DEMODULATING DIGITAL SUBSCRIBER LINE MODEM SIGNAL

PROBLEM TO BE SOLVED: To prevent the complication of a modem and a cost rise for a high bit transmission speed by using a programmable digital signal processor and running one of the modem softwares of two bands in combination with an analog front end and a common host interface. SOLUTION: This mode...

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Bibliographische Detailangaben
Hauptverfasser:	POLLEY MICHAEL O, FRANTZ GENE A, LU XIAOLIN, RILEY TERENCE J, SHAVER DONALD P, WU SONG S, TIMM WILLIAM C, MANNERING DENNIS G, CHEN WALTER Y, GARCIA DOMINGO G
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MULTIPLEX COMMUNICATION TELEPHONIC COMMUNICATION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the complication of a modem and a cost rise for a high bit transmission speed by using a programmable digital signal processor and running one of the modem softwares of two bands in combination with an analog front end and a common host interface. SOLUTION: This modem 100 performs reception at a frequency within a voice band in a voice band analog front end(VBAFE) 110 and performs transmission and the reception at the frequency of a high voice band higher than the voice band in a digital subscriber line analog front end (DBL AFE) 120 with a subscriber line 140 through a splitter 130. Further, the modem 100 is operated as the high bit transmission speed digital subscriber line modem of the high voice band or a voice band modem by switching a program executed by the programmable digital signal processor(DSP) 150. Thus, the complication of the modem 100 and the cost rise are prevented even for the high bit transmission speed.