Abstract: Aspects of methods and systems for a matching circuit for a broadband bus in automotive applications are provided and may include a twisted pair wiring bus comprising a main line for coupling two end nodes and one or more stub lines, with each stub line coupling a stub node to the main line via a junction impedance on each wire in the stub line. Electrical signals may be communicated between devices coupled to the end nodes and the stub nodes. A subset of the stub nodes may be coupled to the main line in a star configuration. The junction impedance may comprise a resistor on each wire in the stub line where the resistor may have a resistance that is two to three times a nominal impedance of the main line. The junction impedance may comprise a resistor in parallel with an inductor on each wire in the stub line.

Abstract: Methods and systems are disclosed for multiple-input multiple-output power line communication coupling and may include a circuit for powerline communication comprising a 4-wire choke with three terminals coupled to line, neutral, and earth lines via input capacitors for receiving an alternating current (AC) power signal and radio frequency (RF) signals; a first transformer with two terminals coupled to the choke; and a coupling circuit comprising a plurality of powerline communication receivers. A first receiver of the plurality of powerline communication receivers is for receiving a first RF signal via a secondary coil of the first transformer, a second receiver of the plurality of powerline communication receivers is for receiving a second RF signal via a center terminal of a capacitor pair coupled to primary coils of the first transformer, and a third receiver of the plurality of powerline receivers is for receiving a third RF signal via a fourth terminal of the choke.

Abstract: Methods and systems are disclosed for MIMO power line communication signal coupling combined with zero cross detector analog front end and may include a circuit for powerline communication including a coupling circuit and zero cross detector, where both are coupled to an input transformer that receives an alternating current (AC) power signal and radio frequency (RF) signals from line and neutral power lines via input capacitors. The coupling circuit may include a plurality of powerline communication receivers, a that receives a first RF signal via a secondary coil of the input transformer and a second that receives a second RF signal via a center terminal of a capacitor pair coupled to primary coils of the input transformer. The second receiver may comprise a second transformer. A center tap of the second transformer may be coupled to ground via an inductor. A third receiver may generate a third RF signal via the inductor.

Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.

Abstract: Aspects of methods and systems for a matching circuit for a broadband bus in automotive applications are provided and may include a twisted pair wiring bus comprising a main line for coupling two end nodes and one or more stub lines, with each stub line coupling a stub node to the main line via a junction impedance on each wire in the stub line. Electrical signals may be communicated between devices coupled to the end nodes and the stub nodes. A subset of the stub nodes may be coupled to the main line in a star configuration. The junction impedance may comprise a resistor on each wire in the stub line where the resistor may have a resistance that is two to three times a nominal impedance of the main line. The junction impedance may comprise a resistor in parallel with an inductor on each wire in the stub line.

Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.

Abstract: The present disclosure includes systems and techniques relating to wired communication channels, such as telephone lines in a bundled telephone cable. In some implementations, a system includes telephone lines bundled together, electronic equipment at a first location includes a first transceiver device for each of the telephone lines, where each first transceiver device at the first location is configured to coordinate transmissions over a respective telephone line coupled with the first transceiver device; and second transceiver devices coupled respectively with the telephone lines at second locations, such that each second transceiver device is respectively paired with a first transceiver device at the first location; each pair of the first and second transceiver devices is configured to force transmission on a telephone line connecting the pair when another pair of the first and second transceiver devices estimates a signal to noise ratio on the telephone line connecting the other pair.

Abstract: An impedance stabilization network is disposed between a power supply and a mains entry of a power-line communication (“PLC”) device. The network may include: a first branch electrically coupled to a phase terminal of the power supply and electrically coupled to the phase line of the mains; a second branch electrically coupled to a neutral terminal of the power supply and electrically coupled to the neutral line of the mains; and a third branch electrically coupled to one or both of the phase terminal and the neutral terminal of the power supply and to the earth line of the mains.

Abstract: Systems, devices, and techniques relating to network upgrade and protocol selection in wireline communication networks are described. A described network device includes ports to connect with destination devices over wireline transmission mediums, wireline transmission mediums respectively comprising at least one pair of wires for transmitting and receiving data; a packet processor configured to forward packets to and from the ports; first transceiver circuitry configured to communicate using an Ethernet protocol over at least a portion of the wireline transmission mediums; second transceiver circuitry configured to communicate using an OFDM broadband protocol over at least a portion of the wireline transmission mediums; and a controller.

Abstract: The present disclosure describes a device, system, and techniques for separating power line communication (PLC) signals, produced by a PLC modem, from AC mains power, which powers the PLC modem. In some aspects a universal PLC splitter is described that includes an AC mains power input with a line connection, a neutral connection, and a protective earth connection, and a filter coupling the line connection, the neutral connection, and the protective earth connection of the AC mains power input to a line connector, a neutral connector, and a protective earth connector of a socket. The filter suppresses the PLC signals on the AC mains power connections, and provides AC mains power to the socket to power the PLC modem under test. The PLC signals from the PLC modem are coupled to test signal ports for connection to test instruments.

Abstract: The present disclosure includes systems and techniques relating to wired communication channels, such as telephone lines in a bundled telephone cable. In some implementations, a system includes telephone lines bundled together, electronic equipment at a first location includes a first transceiver device for each of the telephone lines, where each first transceiver device at the first location is configured to coordinate transmissions over a respective telephone line coupled with the first transceiver device; and second transceiver devices coupled respectively with the telephone lines at second locations, such that each second transceiver device is respectively paired with a first transceiver device at the first location; each pair of the first and second transceiver devices is configured to force transmission on a telephone line connecting the pair when another pair of the first and second transceiver devices estimates a signal to noise ratio on the telephone line connecting the other pair.