In accordance with example embodiments of the invention there is at least an apparatus and a method to perform determining, by a network node, a repeater, and/or a user equipment of a communication network, a configuration message comprising an identified frequency range of at least one of a first communication link between a donor and a repeater or a second communication link between a user equipment and the repeater for a repeat transmission in the communication network; and communicating with at least one of the repeater or the user equipment an indication of the configuration message for configuration at the repeater and the user equipment of the at least one set of sub-carriers mapped with the at least one physical channel for the repeat transmission, wherein the configuration message is using at least a different frequency offset of supported radio frequency resources to map at least one set of sub-carriers of the at least one of the first communication link and the second communication link with at least one physical channel in supported radio frequency resources of at least one of the first communication link or the second communication link, and mapping comprises performing spectral modification of resources to cause at least one of: sub-carrier shifting, wherein a sub-carrier is selected for the repeater to frequency shift to another part of the spectrum, based on instructions by the network node, sub-carrier inversion, wherein sub-carriers' indices are inversed, based on an on/off decision by the network node, and wherein the spectral modification is causing the at least one set of sub-carriers with the at least one physical channel to have different spectral properties as compared to a target set of sub-carriers associated with at least one of the user equipment or the repeater.

In accordance with example embodiments of the invention there is at least an apparatus and a method to perform determining, by a network node, a repeater, and/or a user equipment of a communication network, a configuration message comprising an identified frequency range of at least one of a first communication link between a donor and a repeater or a second communication link between a user equipment and the repeater for a repeat transmission in the communication network; and communicating with at least one of the repeater or the user equipment an indication of the configuration message for configuration at the repeater and the user equipment of the at least one set of sub-carriers mapped with the at least one physical channel for the repeat transmission, wherein the configuration message is using at least a different frequency offset of supported radio frequency resources to map at least one set of sub-carriers of the at least one of the first communication link and the second communication link with at least one physical channel in supported radio frequency resources of at least one of the first communication link or the second communication link, and mapping comprises performing spectral modification of resources to cause at least one of: sub-carrier shifting, wherein a sub-carrier is selected for the repeater to frequency shift to another part of the spectrum, based on instructions by the network node, sub-carrier inversion, wherein sub-carriers' indices are inversed, based on an on/off decision by the network node, and wherein the spectral modification is causing the at least one set of sub-carriers with the at least one physical channel to have different spectral properties as compared to a target set of sub-carriers associated with at least one of the user equipment or the repeater.

The present invention relates to the field of digital signal processing, and in particular to a Costas sequence time-frequency joint synchronization method based on all-phase spectrum correction. The method improves the defects existing in a discrete frequency spectrum correction algorithm using short-time Fourier transform and sliding correlation. The improvement mainly comprises: the present disclosure provides a solution based on iterative optimization: when an actual frequency offset is an integral multiple of the spectral resolution, a large error can occur, frequency offset correction and time delay correction are carried out on a signal by using an estimated value having a large estimated error, then estimation is carried out again, and the frequency offset of the signal is not a special value by means of an iteration mode.

A method is provided. In some examples, the method includes generating, by processing circuitry, a spread of chips representing an input bit. In addition, the method includes converting, by the processing circuitry, the spread of chips to a plurality of symbols comprising a pair of symbols. The method also includes mapping, by the processing circuitry, the pair of symbols to a single carrier signal and generating, by the processing circuitry, a radio-frequency (RF) signal based on the single carrier signal. The method further includes transmitting, by the processing circuitry via an antenna, the RF signal.

A method is provided. In some examples, the method includes generating, by processing circuitry, a spread of chips representing an input bit. In addition, the method includes converting, by the processing circuitry, the spread of chips to a plurality of symbols comprising a pair of symbols. The method also includes mapping, by the processing circuitry, the pair of symbols to a single carrier signal and generating, by the processing circuitry, a radio-frequency (RF) signal based on the single carrier signal. The method further includes transmitting, by the processing circuitry via an antenna, the RF signal.

Aspects of the disclosure provide for a method implemented by a control system for communicating with a remote device. In at least some examples, the method includes determining a frequency of operation of the remote device and determining whether the frequency of operation of the remote device varies from a programmed frequency. The method further includes determining a frequency scaling factor based on whether the frequency of operation of the remote device varies from a programmed frequency. The method further includes generating a frequency shift keying (FSK) signal, scaling the FSK signal to generate a frequency scaled shift keying (FSSK) signal, and transmitting the FSSK signal to the remote device.

Disclosed is a method for transferring data during power transfer in a wireless power transfer system (100). The wireless power transfer system (100) comprises a power transmit device (120) arranged to transfer power over an inductive wireless power transfer interface (105) operating at a transmit frequency to a power receive device (110). The wireless power transfer system (100) is adapted to transfer information at half duplex using Frequency Shift Keying, FSK, in one direction and Amplitude Shift Keying, ASK, in the other direction. The method comprises transferring, at the transmit frequency by the power transmit device (120), power to the power receive device (110) and, during the transferring transmitting, at the transmit frequency by one of the power transmit device (120) or the power receive device (110) a first data packet to the other of the power transmit device (120) or the power receive device (110) using one of two modulation types being FSK or ASK. The method further comprises, during the transmitting, determining, by the device (110, 120) transmitting the first data packet, if a signaling condition is fulfilled, and if the signaling condition is fulfilled, changing a data communication configuration of the device (110, 120) transmitting (311) the first data packet. Further to this, a power transmit device, a power receive device and a test system is disclosed.

Disclosed is a method for transferring data during power transfer in a wireless power transfer system (100). The wireless power transfer system (100) comprises a power transmit device (120) arranged to transfer power over an inductive wireless power transfer interface (105) operating at a transmit frequency to a power receive device (110). The wireless power transfer system (100) is adapted to transfer information at half duplex using Frequency Shift Keying, FSK, in one direction and Amplitude Shift Keying, ASK, in the other direction. The method comprises transferring, at the transmit frequency by the power transmit device (120), power to the power receive device (110) and, during the transferring transmitting, at the transmit frequency by one of the power transmit device (120) or the power receive device (110) a first data packet to the other of the power transmit device (120) or the power receive device (110) using one of two modulation types being FSK or ASK. The method further comprises, during the transmitting, determining, by the device (110, 120) transmitting the first data packet, if a signaling condition is fulfilled, and if the signaling condition is fulfilled, changing a data communication configuration of the device (110, 120) transmitting (311) the first data packet. Further to this, a power transmit device, a power receive device and a test system is disclosed.

Techniques for denoising an electromagnetic signal are disclosed. The techniques utilize an antenna, a weight adaptation component, a reservoir computer including a computer interpretable neural network, a delay embedding component, and an output layer computer. The techniques include passively acquiring an electromagnetic signal by the antenna, producing a plurality of reservoir state values by the reservoir computer based on the electromagnetic signal, collecting the plurality of reservoir state values by the delay embedding component into a historical record, determining a plurality of reservoir state value weights by the weight adaptation component based at least in part of the historical record, scaling, by the plurality of reservoir state value weights, to produce a plurality of output values, the plurality of reservoir state values by the output layer computer, and outputting the plurality of output values, where the scaling occurs over a plurality of clock cycles of a clock for the system.

Described are power line communication (PLC) systems, devices and techniques which are reliable and suitable for use in control applications which can operate with relatively low data rates while complying with governing regulatory rules. Such systems, devices and techniques enable demand-side management of electrical loads in a building or facility or other environment.