Patent ID: 8650606
Filing Date: 2014-02-11
Classification: H04B,H04J,H04L,H04N,H04Q,H04W

Abstract:
1. A cable communication system to provide voice and/or data services to a plurality of subscriber premises, the system comprising: an ingress-mitigated cable plant to convey at least upstream information from the plurality of subscriber premises over an upstream path bandwidth including a range of frequencies; and a cable modem system coupled to the cable plant and including at least one demodulation tuner to receive and demodulate at least one upstream radio frequency (RF) signal, wherein the at least one upstream RF signal includes at least one encoded carrier wave having a carrier frequency in the upstream path bandwidth and being modulated, using quadrature amplitude modulation (QAM), with voice and/or data information constituting at least some of the upstream information from at least some of the plurality of subscriber premises, wherein: the at least one upstream RF signal includes a first upstream RF signal having a first carrier frequency of between approximately 5 MHz and 25 MHz; a modulation order of the QAM for the first upstream RF signal is at least 256; the at least one demodulation tuner includes a first demodulation tuner configured to receive and demodulate the first upstream RF signal the first upstream RF signal defines a first upstream physical communication channel in the upstream path bandwidth; a carrier-to-interference-noise ratio (CNIR) of the first upstream physical communication channel is at least 34 decibels (dB); an unequalized modulation error ratio (MER) of the first upstream physical communication channel is at least 28 decibels (dB); the at least one upstream RF signal further includes at least a second upstream RF signal having a second carrier frequency of between approximately 5 MHz and at least approximately 42 MHz; a modulation order of the QAM for the second upstream RF signal is at least 256; and the at least one demodulation tuner includes a second demodulation tuner configured to receive and demodulate the second upstream RF signal.