Abstract: In one embodiment, the method includes obtaining channel response data including a first channel frequency response of a channel over a first frequency spectrum, where the first channel frequency response is generated in response to a transmission over the channel or a simulation thereof; and generating an estimate of a second channel frequency response of the channel over a second frequency spectrum in response to applying the channel response data to a machine-learning model, where the second frequency spectrum is different to the first frequency spectrum.

Abstract: There is provided mechanisms for transmission of MU-MIMO signals. A method is performed by a network node. The method includes obtaining parameter values of statistics of co-scheduled user equipment served by the network node. The statistics at least pertains to mobility of each of the user equipment. The method includes dynamically selecting a multi-user transmission configuration from candidate multi-user transmission configurations. Each candidate multi-user transmission configuration specifies at least a digital precoding mode selected from candidate digital precoding modes and an analog beam steering mode selected from candidate analog beam steering modes. The multi-user transmission configuration is selected according to the parameter values and a configured mapping of the parameter values to the candidate multi-user transmission configurations. The method includes transmitting the MU-MIMO signals towards the user equipment using the selected multi-user transmission configuration.

Abstract: A noise reduction system for a digital receiver reduces noise in signals received at the digital receiver. The digital receiver includes an input for receiving an analogue signal, analogue signal processing circuitry for processing an analogue signal, and an output for providing the processed signal to a digital signal processor. The noise reduction system is located between the input and the digital receiver input, and includes a first component that outputs results of a noise signal identification and a second component that applies one or more counter-measure to the received analogue signal to produce a modified analogue signal. The modified analogue signal has a reduced level of noise compared to the received analogue signal, wherein the noise reduction system is arranged to assess the effectiveness of the one or more counter-measures applied by the second component to determine whether any further counter-measures are required.

Abstract: Embodiments of the present disclosure provide a multi-user detection method and apparatus for cell-free Multiple-Input Multiple-Output (MIMO). The method includes: receiving, by a Central Processing Unit (CPU) of a cell-free MIMO system, an MRC merged data symbol stream SMRC=HHY of K users transmitted by an Access Point (AP), and multiplying SMRC by a conjugate transpose matrix SMRCH of SMRC to obtain a K*K matrix SMRCSMRCH; and performing singular value decomposition on the matrix SMRCSMRCH to obtain a unitary matrix V and a diagonal matrix A, obtaining a diagonal matrix ? according to the diagonal matrix A, and estimating sending-end data symbols of the K users by a formula {tilde over (S)}=V?VHSMRC.

Abstract: This application discloses example data encoding methods, data decoding methods, and communication apparatuses. One example data encoding method includes generating M encoding units and distributing the M encoding units to N transmission channels. The M encoding units are obtained by encoding L frames. The M encoding units include at least one first-type unit. A first-type unit of the at least one first-type unit includes a first identifier. The first identifier indicates a start location that is in the first-type unit and that is of a frame header of a first frame in the L frames. M, N, and L are integers greater than or equal to 1.

Abstract: An example electronic device includes a communication processor; at least one radio frequency integrated circuit (RFIC) connected to the communication processor; at least one radio frequency front-end (RFFE) circuit connected to the at least one RFIC and configured to process a transmission signal; and a plurality of antennas connected through the at least one RFFE circuit. The communication processor may control to transmit, at a first time point when a reference signal is to be transmitted through a first antenna from among the plurality of antennas, the reference signal to a base station through the first antenna; and transmit, at a second time point when the reference signal is to be transmitted through a second antenna from among the plurality of antennas, a reference signal adjusted at least based on a signal received through the second antenna to the base station through the first antenna.

Abstract: In a communication network that comprises a reciprocal channel between a transmitter and a receiver, the receiver produce a measurement of the reciprocal channel and exploits channel reciprocity to agree with the transmitter on a random code derived from the measurement. The transmitter employs the random code to produce linearly coded data, which is transmitted to the receiver. The receiver uses the random code to decode the linearly coded data by solving a system of linear equations.

Abstract: Methods and apparatuses for reporting of time-domain channel correlation properties are provided. A method includes receiving a configuration about a CSI report. The configuration includes information about (i) M non-zero power (NZP) CSI reference signal (RS) resources for tracking, (ii) a number (K) of time-domain correlation values, and (iii) delay values ?k for k=0, 1, . . . , K?1. The method further includes, based on the configuration: measuring the M NZP CSI-RS resources for tracking, determining, based on the measurement, the K time-domain correlation values, wherein a k-th correlation value is between two CSI-RS transmission occasions that are separated by one of the delay values ?k, and quantizing a value for an amplitude of each of the K time-domain correlation values. The method further includes transmitting the CSI report including an indicator, for each of the K time-domain correlation values, indicating the quantized value of the amplitude.

Abstract: Methods, media, and systems are provided for a priority-based multi-user (MU) multiple-input multiple-output (MIMO) pairing threshold for codebook beamforming. The methods, media, and systems identify a plurality of user device candidates for a user device pairing. A first user device of the plurality of user device candidates having a higher priority than another user device of the plurality of user device candidates is identified. Correlations between one or more beams associated with one or more of the plurality of user device candidates are determined. Based on determining the correlations, user devices can be paired for resource sharing. In some embodiments, the user devices are paired based on beam correlations being below a threshold. For example, the threshold can be determined based on a priority of one or more of the user devices.

Abstract: The present disclosure relates to a technology for controlling an antenna in a wireless communication system. A beam tracking apparatus comprises an antenna unit simultaneously generating a plurality of directional beams, a transceiver including at least one transceiver unit (TXRU) supplying a signal to the antenna unit or receiving a signal from the antenna unit, and a controller controlling beam generation of the antenna unit and TXRU assignment of the transceiver. The controller controls the antenna unit to generate a serving beam, receives a first signal from a target communication device using the serving beam, controls the antenna unit to generate at least one tracking beam oriented in a different direction from the serving beam while maintaining the serving beam, receives a second signal from the target communication device using the serving beam and the at least one tracking beam, and determines whether to change the serving beam based on the received first and second signals.

Abstract: Certain aspects of the present disclosure provide techniques for improving beam management. An example method includes receiving, from a network entity, configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity, detecting a change in an operation mode of the UE from a first operation mode to a second operation mode, and transmitting, based on the detected change in the operation mode of the UE, information to the network entity indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states.

Abstract: A system and a method to delegate out-of-band (OOB) management of a shared ultra-wideband (UWB) clock. The system may comprise a tagged device with a UWB tag and multiple anchors. The tagged device may be configured to establish at least one OOB communication link with at least one anchor, transmit UWB compatibility information to multiple anchors, establish a UWB communication links with the anchors, and exchange OOB synchronization parameters and UWB synchronization parameters with the anchors. Further, the tagged device may be configured to define new instructions for ranging round operations based at least in part upon the OOB synchronization parameters and the UWB synchronization parameters, update existing instructions with the new instructions in the ranging round operations, and perform the ranging round in accordance with the updated instructions.

Abstract: Techniques are described for implementing multiband digital predistortion in a broadband transmitter in a manner that provides effective compensation of non-linear distortion arising from integration of a high-power amplifier (HPA). Embodiments segment the signal spectrum of a transmit signal into multiple sub-band signals and apply non-linear distortion compensation separately and concurrently for each sub-band signal. The resulting multi-band digital predistortion (mDPD) compensates both for in-band distortion and for distortions from non-linear interactions between the frequency sub-bands. The disclosed mDPD can provide enhanced performance features, such as handling of memory effects, reduced sampling rate requirements for DPD components, and minimizing detrimental spectral regrowth at the HPA output.

Abstract: The present disclosure relates to an electronic device and a method for performing ranging through a UWB communication including receiving state information of each of moving nodes occupying channels provided by anchor nodes in a UWB communication area to perform ranging on the anchor nodes, setting priorities of the moving nodes based on the state information, and recovering one of the channels occupied by the moving nodes based on each of the priority.

Abstract: A wireless communication system includes a first communication device and a second communication device. The first communication device includes a modulator configured to provide modulation and a first coupler configured to wirelessly transmit a signal. The second communication device includes a second coupler configured to wirelessly receive a signal by being coupled to the first coupler by at least one of electric-field coupling or magnetic-field coupling and a demodulator configured to provide demodulation. The first communication device or the second communication device includes an equalizer configured to provide equalization.

Abstract: A wireless receiver in 5G and 6G can localize message faults by defining “exclusion regions” that do not include any of the predetermined allowed modulation states of a modulation scheme. Then, upon receiving a message, the receiver can measure (or calculate from the I and Q branch amplitudes) the received amplitude and phase of the waveform signal in each message element. If either the received amplitude or the received phase is within any of the exclusion regions, the receiver determines that message element is faulted. If the received amplitude and received phase are not within any of the exclusion regions, the message element is demodulated according to the closest modulation state. In addition, the receiver can increment an amplitude fault tally and a phase fault tally according to which parameter-amplitude or phase-is inside the exclusion regions, thereby greatly simplifying recovery of the message without a retransmission.

Abstract: A method for frequency and time synchronization with respect to a satellite, the method including: calculating a frequency offset ({circumflex over (f)}B,e) due to an instability of a satellite oscillator from a beacon signal (fB,TXN); determining a Satellite Motion Doppler Correction for Ephemeris (SMDCe) of a satellite motion based on ephemeris data for the satellite; computing a Satellite Reference Drift Correction for Ephemeris (SRDCe) based on the frequency offset, the beacon signal and the SMDCe; setting a loopback TX frequency based on the SMDCe and the SRDCe; and transmitting a loopback TX signal to the satellite at the loopback TX frequency.

Abstract: Embodiments of the present application provide a synchronization method and apparatus, and the method includes: performing clock synchronization according to first clock information or second clock information. By determining that the clock synchronization is performed according to the first clock information or the second clock information, it is possible to effectively determine an implementation of a terminal device for clock synchronization when system information and dedicated information exist at the same time, so as to ensure the clock synchronization between a network device and the terminal device.

Abstract: A communication apparatus includes a circuitry and a transmitter. In operation, the circuitry generates a Demodulation Reference Signal (DMRS) and generates downlink control information indicating a mapping pattern of the DMRS from a plurality of mapping patterns, and the transmitter transmits the DMRS and the downlink control information. The plurality of mapping patterns include a first mapping pattern and a second mapping pattern. Resource elements used for the DMRS of the second mapping pattern are same as a part of resource elements used for the DMRS of the first mapping pattern. A number of the resource elements used for the DMRS of the first mapping pattern is larger than a number of the resource elements used for the DMRS of the second mapping pattern.

Abstract: The present specification provides a method fir transmitting learning class information, the method being performed by a terminal in a wireless communication system and comprising the steps of: transmitting a random access (RA) preamble to a base station; receiving a random access response (RAR) from the base station in response to the RA preamble; performing a radio resource control (RRC) connection procedure with the base station; determining the learning class information, wherein the learning class information is information about the degree of performance improvement in online learning, and the online learning is artificial intelligence (AI) algorithm-based learning following the activation of the wireless communication system; transmitting the learning class information to the base station; and performing channel state information (CSI) feedback according to the learning class information.