Multiplex communications – Channel assignment techniques – Combined time and frequency assignment
Patent
1995-06-30
1998-02-17
Olms, Douglas W.
Multiplex communications
Channel assignment techniques
Combined time and frequency assignment
370442, 348 6, 348 11, H04H 108
Patent
active
057198675
ABSTRACT:
A communication system for coupling telephony or other digital networks to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers are modulated onto the reverse band of the broadband network in a frequency division multiplex (FDM). The modulated telephony signals are received at a telephony network interface coupled to the broadband network. A selected plurality of modulated telephony signals are frequency shifted to baseband. The baseband-shifted telephony signals are sampled to generate a plurality of time division multiple access telephony signal samples. A plurality of time division multiple access telephony signal samples are channelized into a serial data stream with a channelizer. The serial data stream is processed with a single digital signal processor (DSP) to derive a plurality of demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.
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Massaroni Kenneth M.
Ngo Ricky
Olms Douglas W.
Pezdek John Victor
Powers, III Frederick W.
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