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Hybrid/fiber coax video and telephony communication system with poly-phase filtering

  • US 6,535,715 B2
  • Filed: 09/15/1999
  • Issued: 03/18/2003
  • Est. Priority Date: 02/06/1995
  • Status: Expired due to Term
First Claim
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1. A communication system, comprising:

  • a distribution network between a head end terminal and at least one remote unit, the head end terminal for receipt of upstream telephony information and upstream control data in a frequency bandwidth over the distribution network;

    at least one service unit multicarrier means, each associated with 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;

    service unit controller means operatively connected to the service unit multicarrier means for controlling the modulation performed by the service unit multicarrier means; and

    wherein the head end terminal includes;

    head end multicarrier means for demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers in the frequency bandwidth, the head end multicarrier means including polyphase filter means for filtering the at least upstream telephony information modulated on the plurality of orthogonal carriers to provide ingress protection for the modulated orthogonal carriers; and

    head end controller means operatively connected to the head end multicarrier means for controlling receipt of the upstream control data and upstream telephony information.

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