This application provides a beam selection method and apparatus, and a storage medium. The method includes: separately measuring a sounding reference signal SRS sent by at least one terminal, to determine a first spectral efficiency of each terminal; calculating a second spectral efficiency of each beam group based on the first spectral efficiency of each terminal, where each beam group includes at least one beam, and each beam covers at least one terminal; and determining a target beam group based on the second spectral efficiency of each beam group.

A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.

A transmission apparatus including the number of antennas different from a reception apparatus and performing transmission by SC-MIMO to and from the reception apparatus includes a training signal generation unit that generates a known signal predetermined, a CP addition unit that adds a CP to each symbol of a transmission signal including the known signal, a weight generation unit that multiplies a channel matrix estimated based on the known signal by the reception apparatus by a pseudo-inverse matrix obtained by a predetermined number of iterative calculations to generate a transmission weight that is diagonalizable, and a transmission beam formation unit that uses the transmission weight to form a transmission beam for the transmission signal where the CP is added.

It is provided a method, comprising identifying a value of an onsite channel characteristic of a receive channel; requesting a neural network parameter, wherein the request comprises an indication of the onsite channel characteristic; monitoring if the neural network parameter is received in response to the request; estimating the receive channel by a neural network using the neural network parameter if the neural network parameter is received.

A pilot information symbol sending method, a channel estimation method, and a communications device. The method includes: determining, based on a discrete Fourier transform DFT matrix and a sensing matrix, a pilot information symbol corresponding to each antenna on each pilot resource; and sending a corresponding pilot information symbol on each of the pilot resources for each of the antennas; where the sensing matrix is determined through training of channel information.

An uplink transmission method includes receiving a first message that is used to configure a first uplink resource. The method also includes performing uplink transmission on the first uplink resource. The first uplink resource includes at least a first part and a second part in a first time period, a phase deviation of uplink transmission between the first part and the second part falls within a first threshold range, or a power deviation of uplink transmission between the first part and the second part falls within a second threshold range. The first time period is a duration between a start time and an end time of the first uplink resource in a first time length, or a duration between a start time and an end time of the first uplink resource in a first transmit opportunity.

A method performed by a receiver of a wireless communications system to reduce the latency of channel estimation. The method includes receiving a data signal and a sequence of reference signals communicated over a wireless communication channel. In response to determining that the data signal is time critical or that a threshold reliability of the channel estimation is not required, the receiver estimates a channel condition of the wireless communication channel based on a portion of the sequence of reference signals. The receiver performs demodulation and decoding of the data signal prior to processing the entirety of the sequence of reference signals. The demodulation and decoding are adapted based on the estimated channel condition of the wireless communication channel.

Wireless communications systems and methods related to CSI feedback are provided. A user equipment (UE) receives an indication of a restricted set of frequency domain (FD) beamforming components and one or more channel state information reference signals (CSI-RSs). The UE may transmit channel state information (CSI) report indicating a plurality of precoding coefficients based on the received one or more CSI-RSs and the restricted set of FD beamforming components.

Disclosed are a method and apparatus for transmitting and receiving a physical downlink control channel (PDCCH) in a wireless communication system. A method for receiving a PDCCH, according to an embodiment of the present disclosure, may comprise the steps of: receiving, from a base station, configuration information related to a control resource set (CORESET); and receiving, from the base station, a PDCCH within the CORESET. The configuration information may include transmission control indicator (TCI) state information related to the CORESET, the TCI state information may include information about one or more reference signals which are in a quasi-co-location (QCL) relationship with one or more antenna ports of a demodulation reference signal (DMRS) of the PDCCH, and a plurality of TCI states may be configured for the CORESET.

A second base station may allocate a set of downlink resources for a downlink transmission. The set of downlink resources may include a subset of null resources, which may serve as a signature for the second base station. The second base station may transmit downlink data or reference signals on the set of downlink resources including the subset of null resources. A first UE may experience the downlink transmission from the second base station as interference. The first UE may identify the set of downlink resources. The first UE may identify the subset of null resources. The first UE may transmit, to a first base station, an indication of the subset of null resources. The first base station may identify the second base station based on the indication of the subset of null resources. The first base station may transmit, to the second base station, an interference coordination message.