A receiving device for receiving PLC signals, including a filtering stage linked to an input of the receiving device and configurable in at least two modes including a default mode, wherein the filtering stage passes at least first PLC signals included in a first frequency band and second PLC signals included in a second frequency band separate from the first frequency band, and a first selection mode, in which the filtering stage passes the first PLC signals and stops the second PLC signals; and a processing circuit linked to the filtering stage and arranged to receive frames of PLC signals, and, for each received frame, to analyse a preamble of the frame, and to dynamically configure the filtering stage in the first selection mode if the frame is a frame of first PLC signals.

Aspects of the subject disclosure may include, a system that facilitates receiving a first group of electromagnetic waves, wherein the first group of electromagnetic waves propagate along a first span of a transmission medium without requiring an electrical return path and without traversing a first supporting device or a second supporting device. The first span of the transmission medium is supported by the first supporting device and the second supporting device, and the first group of electromagnetic waves convey a first communication signal. The first communication signal is extracted from the first group of electromagnetic waves, and the first communication signal is transmitted to a communication device. Other embodiments are disclosed.

In accordance with one or more embodiments, a transmission device includes a receiver configured to receive an interfering signal via an antenna. A controller is configured to select a subset of a plurality of guided electromagnetic wave resource blocks, based on the interfering signal, to mitigate an interference with a distributed antenna system. A transmitter is configured to generate electromagnetic signals conveying data, in accordance with the subset of the plurality of guided electromagnetic wave resource blocks. A coupler is configured to generate guided electromagnetic waves in response to the electromagnetic signals, wherein the guided electromagnetic waves propagate, without requiring an electrical return path, along a surface of a transmission medium of a distributed antenna system.

Aspects of the subject disclosure may include, for example, a transmission system having a coupling device, a bypass circuit, a memory and a processor. The coupling device can facilitate transmission or reception of electromagnetic waves that propagate along a surface of a transmission medium. The memory can store instructions, which when executed by the processor, causes the processor to perform operations including restarting a timer to prevent the bypass circuit from disabling the transmission or reception of electromagnetic waves by the coupling device. Other embodiments are disclosed.

A main power line (+ and lines) is coupled to a power supply, for example a car battery, grounded to a vehicle chassis. Positive and negative main power lines are coupled to a power line gateway module, and spliced to carry power for a segment, until receiving, by splices, RF power line communications. The main power lines, now carrying power and RF power line communications are then coupled to remote modules. RF power line communication carries signal from the power line gateway module to a impedance matching network or a transformer are used to match impedances.

A fuel cell power generation plant is disclosed. The plant includes fuel cell systems, each of which includes a fuel cell stack, sensors, actuators, a DC-DC converter and a microcontroller. The stack is coupled to a DC bus via the converter. The microcontroller communicates with the sensors, the actuators and the converter, and is configured to acquire sensor data from the sensors and obtain control signals for the actuators and the converter. The plant further includes an inverter coupled with the converter of each system via the DC bus and coupled to a power load, a first power line communication (PLC) modem coupled with the microcontroller of each system, a second PLC modem coupled with the first PLC modem via the DC bus; and a plant controller coupled with the second PLC modem and communicating with the inverter. A method of communication for use in a fuel cell power generation plant is also disclosed.

A signal transmission system includes: a switch component, a first choke component, a first conductive path and a second choke component that are connected in series between a power wire and a load; a third choke component and a resonant circuit that are connected in series between another power wire and a common node of the switch component and the first choke component; a second conductive path connected between the load and a common node of the third choke component and the resonant circuit; and a control block. Under control of the control block, a magnetic core of each choke component reaches magnetic saturation when the switch component does not conduct, and operates at magnetic saturation when the switch component conducts.

In accordance with one or more embodiments, an analog surface wave multi-point repeater includes a first launcher configured to transmit and receive first guided electromagnetic waves that propagate on an outer surface of a first segment of a transmission medium without requiring an electrical return path. A transceiver includes a splitter coupled to a second launcher and the third launcher and a low noise amplifier configured to receive a second microwave signal from the second launcher and the third launcher via the splitter. A directional coupler is configured to couple the second microwave signal from the second launcher and the first microwave signal to the splitter to facilitate transmission of the second guided electromagnetic waves by the second launcher on the second segment of the transmission medium and to further facilitate transmission of the third guided electromagnetic waves by the third launcher on the third segment of the transmission medium.

Systems for exchanging information between a cargo handling system of an aircraft and a Power Drive Unit (PDU) are described herein. The systems include a power source provided within the aircraft and a first PDU provided within the aircraft. The power source is capable of providing DC power to the at least one PDU via an electrical power line. The power source further including a first Power Line Communication (PLC) node and the PDU further including a second Power Line Communication (PLC) node. The first PLC node being capable of communicating with the second PLC node via the electrical power line.

A coupling circuit for power line communications includes a coupling transformer having first and second mutually coupled windings, with the first winding connectable to a power line. The second winding includes a pair of intermediate taps with one or more tuning inductor therebetween. The inductor or inductors are set between a first portion and a second portion of the second winding of the coupling transformer. A switch member is provided coupled with the inductor. The switch member is selectively actuatable to short-circuit the inductor.