Abstract: Methods and systems for cross-protocol time synchronization may comprise, for example, in a premises-based network, receiving, by a network controller in the premises, signals that conform to a first communications protocol. The received signals may be bridged to conform to a second communications protocol different from the first communications protocol, and the bridged signals may be communicated to networked devices within the network, where only signals conforming to the second communications protocol may be concurrently communicated over the network in a frequency range of the first communications protocol and in a frequency range of the second communications protocol, the frequency range used by the first communications protocol not overlapping with the frequency range used by the second communications protocol. The first communications protocol signals may comprise data over cable service interface specification (DOCSIS) signals, cable, and/or or satellite television signals.

Abstract: A circuit for down-converting an RF signal to a baseband signal includes a trans-admittance amplifier adapted to receive the RF signal and generate in response a pair of differential current signals. The circuit further includes a trans-impedance amplifier having at least four mixers and at least four linear amplifiers. The four mixers frequency down-convert the pair of differential current signals to generate four pairs of differential baseband current signals, wherein each pair of the differential baseband current signals has a different phase and is associated with each of the linear amplifiers. Additionally, the circuit includes a summing block that generates an in-phase signal using a first weighted sum of the four different baseband current signals and a quadrature signal using a second weighted sum of the four different baseband current signals. The circuit further includes an analog-to-digital converter for converting the in-phase and quadrature signals to respective digital representations.

Abstract: A cable modem termination system (CMTS) may communicate with a plurality of cable modems using a plurality of orthogonal frequency division multiplexed (OFDM) subcarriers. The CMTS may determine a performance metric of each of the cable modems. For each of the OFDM subcarriers and each of the cable modems, the CMTS may select physical layer parameters to be used for communication with that cable modem on that OFDM subcarrier based on a performance metric of that cable modem. The parameters may be selected for each individual modem and/or each individual subcarrier, or may be selected for groups of modems and/or groups of subcarriers. The parameters may include, for example, one or more of: transmit power, receive sensitivity, timeslot duration, modulation type, modulation order, forward error correction (FEC) type, and FEC code rate.