A system and methodology are provided for improving telemetry over a three-phase electrical power cable of the type used to provide power to electric submersible pumping systems or other powered devices. Data communication is provided between one end of a three-phase electrical power cable coupled with an electric power source and the other end of the three-phase electrical power cable coupled to a powered device, such as an electrical motor. The system and methodology enable a reduction in the level of common mode noise generated by, for example, a variable speed drive and/or enable minimizing or eliminating the common mode noise before mixing with data communication signals.

Aspects of the subject disclosure may include, for example, a system for transmitting first electromagnetic waves that propagate on a surface of a component of a transit system, and receiving second electromagnetic waves that propagate on the surface of the component of the transit system. Other embodiments are disclosed.

Embodiments include methods of powerline communications using a preamble with band extension is provided. A method may include receiving a packet data unit PDU. Bit-level repetition is applied to at least a portion of the PDU to create a repeated portion. Interleaving is performed per a subchannel. Pilot tones are inserted in the interleaved portion. Each data tone is modulated with respect to a nearest one of the inserted pilot tones. The PDU is transmitted over a power line.

The communication adaptor (1) comprises a housing configured to be inserted in a profiled track (12) of the light trunking system (11), the housing comprising outer walls, electrical contacts arranged to be exposed onto at least one of the outer walls, the electrical contacts being configured to contact different electrical lines (14) arranged in the profiled track (12), a Power Line Communication interface configured to receive and/or transmit PLC data, the PLC data being conveyed on one or more of the electrical lines (14), an additional interface configured to receive and/or transmit non-PLC data, preferably IP protocol data, and a data converter configured to convert i) PLC data from the Power Line Communication interface into non-PLC data for the additional interface, and/or ii) non-PLC data from the additional interface into PLC data for the Power Line Communication interface.

A power distribution system including a first and second speaker is provided. The first speaker includes (1) a first input receiving a first power signal; (2) a second input receiving a second power signal phase shifted 120 degrees from the first signal; (3) a third input receiving a third power signal phase shifted 120 degrees from both the first and second signal; (4) a first output transmitting the third power signal; (5) a second output transmitting the first power signal; (6) a third output transmitting the second power signal; and (7) a first load coupled to the first and second input. The second speaker includes (1) a first input receiving the third power signal; (2) a second input receiving the first power signal; (3) a third input receiving the second power signal; and (4) a second load coupled to the first and second input.

Embodiments include methods of powerline communications using a preamble with band extension is provided. A method may include receiving a packet data unit PDU. Bit-level repetition is applied to at least a portion of the PDU to create a repeated portion. Interleaving is performed per a subchannel. Pilot tones are inserted in the interleaved portion. Each data tone is modulated with respect to a nearest one of the inserted pilot tones. The PDU is transmitted over a power line.

A system (and system controller) has powering of, and communication with, a set of fixtures using an AC cable having a power line (e.g. a mains live wire), a reference line (e.g. a mains neutral wire) and a data line. Fixtures are at different positions along the cable, each powered by the local voltage difference between the power line and the reference line. A system controller provides a data signal over the data line, wherein the data signal for a fixture is defined by the local voltage difference between the data signal on the data line and the reference line (or power line). In order to compensate for voltage drops, a compensation circuit adds a voltage offset waveform to the data signal which is dependent on the overall set of positions of the fixtures. This enables an increased number of fixtures and/or reach of the fixtures connected to the system controller.

The embodiments of the present disclosure disclose a channel switching processing method, device and system, storage medium, and an electronic device. The channel switching processing method includes: acquiring a signal noise on a first channel corresponding to a first power line, wherein a communication signal is transmitted on the first channel; comparing a magnitude of the signal noise to a predetermined threshold; and in the event that the signal noise of the first channel is greater than a signal noise of a second channel, switching the communication signal from the first channel to the second channel corresponding to a second power line according to a comparison result.

The disclosed embodiments include a power and data delivery system for downhole gauges of a well. The power and data delivery system includes a three-phase power supply coupled to a power cable to supply power to a downhole motor positioned along a wellbore. Additionally, the power cable transmits power and data signals. The power and data delivery system also includes a downhole gauge coupled to the downhole motor, and the downhole gauge transmits downhole data signals along the power cable to a gauge surface panel. Further, the power and data delivery system includes at least one gauge positioned remotely from the downhole gauge and coupled to the power cable. The at least one gauge also transmits gauge data signals along the power cable to the gauge surface panel.

A broadband over powerline (BPL) unit is provided. The BPL unit includes at least one processor programmed to execute a first virtual machine and a second virtual machine, at least one memory device in communication with the at least one processor, and a powerline transceiver. The at least one processor is programmed to transmit and receive data over a three-phase power line via the powerline transceiver. The at least one processor is also programmed to receive, via the first virtual machine, a first plurality of data for transmission via the powerline transceiver, receive, via the second virtual machine, a second plurality of data for transmission via the powerline transceiver, transmit, via the powerline transceiver, the first plurality of data via a first phase, and transmit, via the powerline transceiver, the second plurality of data via a second phase.