Abstract: A multi-functional reconfigurable intelligence surface (MF-RIS) integrating signal reflection, refraction and amplification and energy harvesting and an application thereof are provided. The MF-RIS can support wireless signal reflection, refraction and amplification and energy harvesting on one surface, to amplify, reflect, or refract a signal through harvested energy, and further enhance effective coverage of wireless signals. When a signal model of the MF-RIS constructed in the present disclosure is applied to a multi-user wireless network, a non-convex optimization problem of jointly designing operation modes and parameters that include BS transmit beamforming, and different components and a deployment position of the MF-RIS is constructed with an objective of maximizing a sum rate (SR) of a plurality of users in an MF-RIS-assisted non-orthogonal multiple access network.

Abstract: A signal processing method and device are disclosed. The method include: receiving a first signal; processing the first signal to obtain a squared complex envelope of the first signal; obtaining a second signal by processing the squared complex envelope of the first signal using a first filter, where a cutoff frequency of the first filter is determined according to an average-to-peak power ratio of a squared complex envelope spectrum of a third signal, the third signal is obtained by processing the first signal using a second filter, and a cutoff frequency of the second filter is determined according to a bandwidth occupied by the first signal; determining a squared complex envelope spectrum of the second signal; and determining a symbol rate corresponding to the first signal according to the squared complex envelope spectrum of the second signal. As such, the symbol rate of the signal can be determined accurately.

Abstract: A beamformer device is provided for WiFi communication schemes such as IEEE 802.11ax and 802.11be. The beamformer device is configured to: transmit a request to a beamformee device, the request comprising a set of sounding tone indices, the set of sounding tone indices indicating tones for which a report of beamforming information is requested from the beamformee device, wherein the tones are defined according to a first WiFi scheme, wherein the set of sounding tone indices is based on a first tone plan defined by the first WiFi scheme for a partial channel bandwidth and on a second tone plan defined by a second WiFi scheme for a full channel bandwidth. A corresponding beamformee device is further provided.

Abstract: This disclosure relates to a divider, a processor, and a calculation apparatus. The divider includes: a first-stage shift circuit, configured to shift a received first operand to left to generate a second operand; a first-stage selection circuit, configured to select a first preset multiple of a third operand as a fourth operand from preset multiples of the third operand; and a first-stage operational circuit, configured to calculate an OR operation result of the first preset multiple and a difference between the second operand and the fourth operand as a fifth operand.

Abstract: A communications system may include radio frequency (RF) circuitry, an antenna assembly, and an RF cable coupling the RF circuitry and the antenna assembly. The antenna assembly may include an antenna and RF impedance selection circuitry coupled thereto. The RF circuitry may be configured to communicate RF signals with the antenna via the RF cable, and communicate RF impedance selection signals to the RF impedance selection circuitry via the RF cable and using an alternating pulse width modulation scheme.

Abstract: Radio frequency front-end systems with filter reuse. In certain embodiments, a front-end system includes a filter, a low noise amplifier (LNA), and a switch interposed between the filter and an input to the LNA. In a first state of the switch, the filter serves to filter a radio frequency signal that is amplified by the LNA. The front-end system further includes a power amplifier that is coupled to the switch. Additionally, in a second state of the switch, the filter serves to filter an amplified radio frequency transmit signal provided by the power amplifier. Accordingly, a filter along a receive path of the front-end system is reused for transmit.

Abstract: Systems and methods for digital predistortion (DPD) are disclosed herein. In an example embodiment, a digital front-end circuit includes a digital predistortion (DPD) block having a first input terminal and first output terminal, a PA having a second input terminal and second output terminal, and a transmitter coupling the first output terminal at least indirectly with the second input terminal. The DPD block is configured to receive a first input signal and to provide a first output signal having first and second components at the first output terminal. The DPD block includes a main distortion kernel that is configured to generate the first component, and a nonlinear memory kernel that is configured to generate the second component. The nonlinear memory kernel is configured to perform processing at least in part by a nonlinear envelope modulator including a linear finite impulse response (FIR) filter.

Abstract: A beamforming selection method of a first wireless communication node is disclosed. The method includes receiving first reference signaling, transmitted from a second wireless communication node using a first beamforming setting, generating a first channel estimate based on the first reference signaling, and transmitting, using a second beamforming setting, second reference signaling for reception by the second wireless communication node, wherein each coefficient of the second beamforming setting represents a complex conjugate of a corresponding component of the first channel estimate. In some embodiments, the method further includes iterating the receiving, generating, and transmitting steps until a stopping criterion is met. For example, the stopping criterion may include that a number of iterations performed equals a maximum number of iterations, and/or that a beamforming convergence criterion is met. Corresponding apparatus, wireless communication node and computer program product are also disclosed.

Abstract: The disclosure provides a signaling link that overcomes or at least reduces the limitations of RC-dominated signaling wires, improving both the bandwidth and the power consumption of signaling circuits. Both an AC and a DC signaling link are disclosed. In one example, a signaling link is provided that includes: (1) a transmitter including a passive equalizer, (2) an over-terminated receiver, and (3) a lossy channel having a first end connected to the passive equalizer and a second end connected to the receiver, wherein the lossy channel has a channel characteristic impedance that is lower than a terminating impedance of the passive equalizer and a termination impedance of the receiver.

Abstract: Wireless digital communication of information over sound waves is provided using near near-ultrasonic acoustic (audio)-spectrum. A method includes receiving a modulated data signal generated from coupled direct sequence spread spectrum (DSSS) and orthogonal frequency division multiplexing (OFDM) at a transmitter. The modulated data signal has a phase-shift key (PSK) modulated data signal spread by different Q length chip sequence. The method includes demodulating a synchronized data signal by extracting each OFDM data block having a data symbol and preamble and postamble symbols which were transmitted on an orthogonal sub-carrier with variable Q length chip sequence for multi-user communication over air as a transmission medium. This enables synchronization of communication over the air between transmitters and receivers in multiple user devices in the presence of multiple path propagation and different signal to noise ratios.

Abstract: A method for indicating a frame structure, a method for updating a frame structure, and related devices are provided. The method for indicating a frame structure, performed by a first device, includes: determining a first frame structure based on user data to be transmitted; and when the first frame structure is different from a second frame structure corresponding to a second device, sending indication information, where the indication information is used to indicate the first frame structure.

Abstract: An unmanned vehicle (20) for relaying radio frequency signals in a tactical communications network is described. The unmanned vehicle comprises a processor (22) arranged to receive the location of a first asset (40a); select a relay site (30) from at least one relay site; and control the unmanned vehicle to move to the selected relay site, wherein at the selected relay site, communication between the first asset and the unmanned vehicle is enabled. The unmanned vehicle also comprises a receiver for receiving data from the first asset; and a transmitter for transmitting the data to a second asset (40b, 20, 10). A control unit (60) for an unmanned vehicle, a tactical communications network comprising a plurality of unmanned vehicles, and a method of relaying signals in a tactical communications network using an unmanned vehicle are all also described.

Abstract: An electronic control device includes: a circuit board configured to be provided in a frame and to have a communication circuit capable of receiving or transmitting differential signals via a pair of signal pins; a connector configured to be electrically connected to the circuit board and to input signals transmitted from an electronic device outside the frame by single-end transmission to the communication circuit; and a noise cancellation signal output circuit configured to output noise cancellation signals corresponding to noise superimposed on the signals in the connector, wherein one signal pin of the pair of signal pins of the communication circuit is connected to the connector, and the other signal pin is connected to the noise cancellation signal output circuit.

Abstract: This application provides a channel state information (CSI) feedback method including: a terminal device selects B complex coefficients from K complex coefficients according to a preset priority rule, and provides feedback, where K is a quantity of complex coefficients that the terminal device is allowed to feed back, and the preset priority rule is related to at least one of the following: an index value of each complex coefficient in the K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient in the K complex coefficients in S reference signal ports, or an index value of each complex coefficient in the K complex coefficients in a plurality of complex coefficients that are allowed to be selected for a corresponding reference signal port, where S is a quantity of reference signal ports that the terminal device is allowed to select.

Abstract: Example implementations include a method, apparatus and computer-readable medium for wireless communication configured for estimating a channel using a set of predefined sensing beams to measure reference signals. Estimating the channel may include generating an N×N channel correlation matrix, where N is a number of antenna elements in the antenna array. The implementations further include generating a set of dynamic beam weights to maximize a reference signal received power (RSRP) based on the estimated channel. The set of dynamic beam weights may be based on an eigenvector of the channel correlation matrix. Additionally, the implementations further include applying the set of dynamic beam weights to an antenna array.

Abstract: Beam management performed for user equipment in a network. A method is performed by a network node. The method includes collecting performance feedback per beam upon having started to perform a current run of a beam management procedure. The performance feedback is derived from network statistics. The beam management procedure may include determining a candidate beam set from a set of available beams. The beam management procedure may include determining a beam switching command per user equipment for at least some of the user equipment.

Abstract: Apparatuses, methods, and systems are disclosed for performing channel occupancy time sensing. One method includes receiving information configuring a single channel occupancy time for multi-beam transmission in an unlicensed channel. The method includes performing sensing for the single channel occupancy time. The sensing includes: omni-directional sensing at a beginning of the single channel occupancy time; directional sensing on a plurality of beams at the beginning of the single channel occupancy time; directional sensing on the plurality of beams in a time domain multiplexing manner before each transmission based on a time gap between transmissions; or some combination thereof.

Abstract: A communication device configured to operate in a communications network that includes a network node can determine that the communication device will perform a radio link procedure (“RLP”) in a mode of operation. The communication device can further determine information associated with a channel monitoring pattern (“CMP”) based on determining that the communication device will perform the RLP in the mode of operation. The communication device can further monitor a channel between the network node and the communication device based on the information associated with the CMP.

Abstract: A delay device and a control method of transmission delay capable of performing temperature compensation are provided. The delay device includes a first current source, a second current source, a first resistor, and a delay adjustment circuit. The first current source is configured to provide a first current with a constant temperature coefficient. The second current source is connected to the first current source in parallel and is configured to provide a second current with a negative temperature coefficient. A first terminal of the first resistor is coupled to the first current source and the second current source. A second terminal of the first resistor is coupled to a reference ground terminal. The first resistor generates a control voltage at the first terminal of the first resistor according to the first current and the second current. The delay adjustment circuit is coupled to a transmission wire.

Abstract: A communication device for use in a cellular network includes a plurality of antenna panels for communication with cells in a cellular network, circuitry for carrying out a panel selection process based on received power level for selecting an antenna panel, and circuitry for performing measurement cycles requiring determination of respective power levels. The circuitry for performing measurement cycles measures a first received power level from said neighbor cell with the antenna panel selected for said neighbor cell and measures a second received power level from said neighbor cell with the antenna panel selected for said serving cell. The circuitry for performing measurement cycles measures a third power level received for said neighbor cell with the antenna panel selected for said serving cell and adjusting said third power level with an offset function, said adjusted third power level being used as the respective power level for said neighbor cell.