Aspects of the subject disclosure may include, a system that facilitates receiving a modulated signal in a spectral segment for communicating with a communication device, wherein the modulated signal conforms to a signaling protocol, generating a plurality of ultra-wideband electromagnetic waves, wherein the plurality of ultra-wideband electromagnetic waves conveys the modulated signal without modifying the signaling protocol, and transmitting the plurality of ultra-wideband electromagnetic waves via a transmission medium, wherein the plurality of ultra-wideband electromagnetic waves is directed to another system. Other embodiments are disclosed.

Aspects of the subject disclosure may include, an access point that facilitates receiving from a system a modulated signal in a first spectral segment, wherein the system is configured to receive a plurality of ultra-wideband electromagnetic waves via a transmission medium and extract the modulated signal in the first spectral segment from a plurality of modulated signals conveyed by the plurality of ultra-wideband electromagnetic waves, and wherein the plurality of ultra-wideband electromagnetic waves operates in a second spectral segment that differs from the first spectral segment, and transmitting the modulated signal in the first spectral segment to a communication device. Other embodiments are disclosed.

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.

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.

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.

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.

The present invention provides an in-vehicle processing device and an in-vehicle system capable of reducing power consumption while suppressing quality degradation of data to be transmitted and received. An ECU includes a data transmission and reception device for transmitting and receiving data and an MPU for controlling the data transmission and reception device. The data transmission and reception device includes a filter device and a steady current suppression circuit. The filter device attenuates noise that is superimposed on data by reflection of the data. The steady current suppression circuit suppresses a steady current flowing through the filter device and facilitates a transient current flowing through the filter device.

A power line carrier communication apparatus, a method, and a system are provided. The power line carrier communication apparatus includes a communication processing unit, a switching network, and an impedance network. The communication processing unit is configured for modulating a communication signal into a control signal, and the communication signal includes communication data. The switching network is configured for generating a multi-level carrier signal according to the control signal, (n+1)th and lower orders of harmonics contained in the carrier signal are less than or equal to a first threshold, respectively, n represents the number of levels of the carrier signal, and n is an odd number greater than or equal to 3. The impedance network is configured for filtering the carrier signal and then coupling the filtered signal to a power line.

A power line carrier fault detection system includes a forward signal generator configured to transmit a carrier signal to a power line. A directional coupler couples the forward signal generator to the power line. The directional coupler is configured to separate forward and reflected power. A frequency selective filter associated with the directional coupler is configured to meter frequencies within a band of a transmitted carrier signal and to attenuate out of band signals.

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 communcations. 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.