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.

The present invention relates to a device for transmission by power-line communication (1) between two items of equipment (10, 20) on board an aircraft (1), comprising a transmission cable (3) configured to simultaneously transmit a power supply current and a data signal. This cable (3) comprises two twisted pairs of conductors (34, 34a, 34b). The device comprises a data sender (100) comprising a COFDM coupler (44) configured to modulate a signal by carrier modulation according to a COFDM mode, and a data receiver (200) comprising a COFDM coupler (44) configured to demodulate a signal modulated by carrier modulation according to a COFDM mode. The data sender (100) is configured to send a test signal by carrier modulation according to a COFDM mode, while the data receiver (200) is configured to detect signals corresponding to the test signals sent, and to analyze the carriers of the detected signal in regard to the signal sent and deduce therefrom the state of the transmission cable (3).

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 present invention relates to a device for transmission by power-line communication (1) between two items of equipment (10, 20) on board an aircraft (1), comprising a transmission cable (3) configured to simultaneously transmit a power sup ply current and a data signal. This cable (3) comprises two twisted pairs of conductors (34, 34a, 34b). The device comprises a data sender (100) comprising a COFDM coupler (44) configured to modulate a signal by carrier modulation according to a COFDM mode, and a data receiver (200) comprising a COFDM coupler (44) configured to demodulate a signal modulated by carrier modulation according to a COFDM mode. The data sender (100) is configured to send a test signal by carrier modulation according to a COFDM mode, while the data receiver (200) is configured to detect signals corresponding to the test signals sent, and to analyse the carriers of the detected signal in regard to the signal sent and deduce therefrom the state of the transmission cable (3).

Aspects of the subject disclosure may include, for example, receiving, by each of a plurality of receivers, one of a plurality of electromagnetic waves, each electromagnetic wave of the plurality of electromagnetic waves guided by a different one of a plurality of twin-lead transmission lines, each twin-lead transmission line sharing a wire, and each electromagnetic wave of the plurality of electromagnetic waves including a different one of a plurality of communication signals, and obtaining, by each of the plurality of receivers, one of the plurality of communication signals. Other embodiments are disclosed.

A transmission circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with data to be transmitted to a communication device. A reception circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with the conductive/non-conductive state of the transmission path. A transmission circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with data to be transmitted to a communication device. A reception circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with the conductive/non-conductive state of the transmission path. The photocoupler is included in the transmission path. The photocoupler and the photocoupler are in opposite conductive/non-conductive states.

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.

A system for transmitting power and data, particularly including a half-wave control, includes a control unit connected to grid phases, the system having a phase-failure detection device which has bistable multivibrators, especially bistable multivibrators assigned to a respective grid phase. Each bistable multivibrator has an input for setting and an input for resetting, one of the inputs being connected to a digitizing device for digitizing the positive half-waves of a respective grid phase, the other of the inputs being connected to a digitizing device for digitizing the negative half-waves of a respective grid phase. The effective value of the output voltage of the bistable multivibrator is compared by a comparison device to a threshold value to detect a phase failure.

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.

Aspects of the subject disclosure may include, a communication device with a group of radio devices connected with a support structure, where the support structure is positioned in and passes through housing openings in each radio device to provide a stacked arrangement. One or more radio device is rotatable with respect to the support structure to enable adjusting a first orientation of a directional antenna therein. Other embodiments are disclosed.