A method for synchronizing a data frame and data symbols in a communication system includes generating a training sequence including a serial sequence of data symbols that are conjugate symmetric, inserting the training sequence in a transmitter-side data frame, converting constituent data symbols of the transmitter-side data frame to communication signals, transmitting the communication signals from a transmitter to a receiver, converting the communication signals to a stream of received data symbols, detecting presence of the training sequence in the stream of received data symbols, and identifying a position of a received data frame from the presence of the training sequence.

The present disclosure pertains to systems and methods to compress an input signal representing a parameter in an electric power system. In one embodiment, a system includes a data acquisition subsystem to receive an input signal comprising a plurality of high-speed representations of electrical conditions. A linear prediction subsystem generates an excitation signal estimate based on the input signal, a plurality of linear prediction coefficients based on the input signal, and an estimated signal based on the excitation signal estimate and the plurality of linear prediction coefficients. An error encoding subsystem may generate an encoding of an error signal based on a difference between the input signal and the estimated signal. A non-transitory computer-readable storage medium may store an encoded and compressed representation of the input signal comprising the excitation signal estimate, the plurality of linear prediction coefficients, and the encoding of the error signal.

An on-off keying (OOK) receiver circuit includes a band-pass filter and an envelope detector. The band-pass filter includes a high-pass filter, a low-pass filter, and a switch. The high-pass filter is configured to filter an OOK input signal. The low-pass filter is configured to filter an output signal of the high-pass filter. The switch is coupled to an output of the high-pass filter, and is configured to, with each cycle of the OOK input signal, dissipate energy stored in the band-pass filter. The envelope detector is configured to receive a filtered OOK input signal from the band-pass filter, and to generate an OOK output signal based on the filtered OOK input signal.

A semiconductor device, for example an integrated circuit such as a microcontroller (MCU) or a digital signal processor (DSP), includes a semiconductor die coupled with a power supply line, a debug module coupled with the semiconductor die to exchange semiconductor die debug command and data signals with the semiconductor die, and a modem coupled with the power supply line. The debug module is arranged to convey the semiconductor die debug command and data signals over the power supply line.

A power receiving apparatus includes: a communication circuit that receives a control signal from a power transmitting apparatus through a wired transmission line; a control circuit that determines a propagation time in which the control signal is propagated from the power transmitting apparatus to the power receiving apparatus through the wired transmission line; and a demodulation circuit that receives modulated power from the power transmitting apparatus through a wired transmission line, and demodulates, based on the determined propagation time, the modulated power in synchronization with a phase of the modulated power.

A method for operating a device for power line communication includes measuring noise on the power line and detecting noise timing properties. Further, a method for adapting power line communication to detected noise timing properties, which may be asynchronous to the AC mains signal, includes adapting parameters for encoding a data stream and/or transmission parameters according to the detected noise timing properties and/or transmission timing information derived from the detected noise timing properties, encoding a data stream according to the adapted parameters for encoding, and transmitting the encoded data stream to the power line on at least one power line communications channel according to the adapted transmission parameters.

The present invention relates to a control circuitry module group, an electrical device, and a modem device. The control circuitry module group is configured for communication and/or power supply between a master control module and at least one slave modules in an electrical device. The control circuitry module group comprises: a bus; a bus control module coupled to the master control module and the bus, configured to receive a control signal from the master control module, add a target address in the control signal, and send to the bus the control signal with the target address; and at least one slave control modules each coupled to a corresponding slave module and the bus, respectively, and configured to receive the control signal with the target address via the bus, and controlling power supply to the slave module in response to the control signal.

A device interfaces with a mobile communication device, for example, a smartphone or tablet, that has data stored in a memory. A device body has a data storage element integrated inside the device body. A first interface receives alternating current (AC) voltage from a mains power supply. A second interface detachably and electronically couples the mobile communication device to the data storage element. The second interface also provides direct current (DC) voltage to the mobile communication device. A data management application on the mobile communication device issues a command for the device to receive a copy of a subset of the data stored in the memory of the mobile communication device. The received copied subset of data is stored in a protected format having at least one layer of protection in the data storage element. A unique identifier associates the stored subset of data with the mobile communication device.

A power system for a vehicle parking structure is disclosed. The power system comprises: a DC voltage bus arranged throughout the vehicle parking structure and configured to distribute DC power throughout the vehicle parking structure; at least one DC power source operably connected to the DC voltage bus and configured to provide DC power to the DC voltage bus; a plurality of DC loads arranged throughout the vehicle parking structure and operably connected to the DC voltage bus, the plurality of DC loads being configured to operate using DC power from the DC voltage bus; and a control system operably connected to the DC voltage bus and configured to communicate with at least one DC load in the plurality of DC loads using data signals transmitted via the DC voltage bus.

The present disclosure includes systems and techniques relating to power line communications (PLC) systems and apparatus. In some implementations, a method includes determining information regarding a potential data rate to be used with a powerline communications (PLC) channel, reducing a bias current or voltage of an analog front end of a PLC transceiver based on the determined information to reduce power consumption of the analog front end of the PLC transceiver, and transmitting or receiving data over the PLC channel with the reduced bias current or voltage of the analog front end of the PLC transceiver.