Hybrid/fiber coax video and telephony communication system with poly-phase filtering
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United States of America Patent
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Mar 18, 2003
Grant Date -
Jul 25, 2002
app pub date -
Sep 15, 1999
filing date -
Feb 6, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A communication system is described. The communication system includes a distribution network between a head end terminal and at least one remote unit. The head end terminal receives upstream telephony and control data modulated on a plurality of orthogonal carriers in a frequency bandwidth over the distribution network. The head end terminal includes a polyphase filter that filters at least the upstream telephony data to provide ingress protection for the modulated orthogonal carriers. The communication further includes a service unit multicarrier modem associated with the at least one remote unit and operatively connected to the distribution network for modulating at least upstream telephony information on at least one carrier orthogonal at the head end terminal to at least one other carrier in the frequency bandwidth.
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