METHOD AND APPARATUS FOR IMPROVING MULTI-USER MULTIPLEXING PERFORMANCE, DEVICE, AND STORAGE MEDIUM

This application provides a method and an apparatus for improving multi-user multiplexing performance, a device, and a storage medium. In the method, a network device configures base sequence identifiers for a plurality of terminals by using RRC signaling, where there is no orthogonality between base sequences indicated by the base sequence identifiers of all the terminals; the terminal obtains the base sequence identifier that is configured by the network device by using the RRC signaling, and sends a sounding reference signal SRS based on the base sequence identifier; the network device performs SRS detection on the plurality of terminals based on a quasi-orthogonal sequence, to obtain channel information for sending an SRS by each terminal, and performs channel prediction based on the channel information of each terminal, to obtain a channel prediction result. 1. A method for improving multi-user multiplexing performance , wherein the method is applied to a network device , and comprises:configuring base sequence identifiers for a plurality of terminals by using radio resource control (RRC) signaling, wherein there is no orthogonality between base sequences indicated by the base sequence identifiers of the plurality of terminals;performing sounding reference signal (SRS) detection on the plurality of terminals based on a quasi-orthogonal sequence, to obtain channel information for sending an SRS by each terminal; andperforming channel prediction based on the channel information of each terminal, to obtain a channel prediction result of each terminal.2. The method according to claim 1 , wherein the method further comprises:obtaining a motion status of each terminal based on a channel, at different SRS moments, of the terminal, wherein the motion status indicates a magnitude of a moving speed of the terminal, and wherein the motion status comprises a quasi-stationary state, a low-speed moving state, or a medium/high-speed moving state; andobtaining a weight value ...

PRECODING METHOD AND APPARATUS

This application provides a precoding method and an apparatus for improving a power utilization of antennas. The method includes: determining a generalized inverse matrix H of a channel value matrix Hof K users in an miteration in J iteration operations, where m=1, 2, . . . , and J, 1≤J≤M−K+1, and M is a quantity of antennas; selecting, from a set S1based on H, an antenna index nand an update coefficient αcorresponding to n, where S1is a set of n unselected in antenna indexes n of the M antennas until an (m−1)iteration ends; determining a weight matrix Wbased on H and α; and assigning a row in Wand corresponding to nto a row in a final weight matrix Wand corresponding to n, where Wis to adjust transmit powers of at least J of the M antennas to a preset maximum transmit power P after the J iteration operations end. 1. A precoding method , comprising:{'sub': m', 'm, 'sup': +', 'th, 'determining a generalized inverse matrix H of a channel value matrix Hof K users in an miteration in J iteration operations, wherein m=1, 2, . . . , and J, 1≤J≤M−K+1, J is an integer, and M is a quantity of antennas;'}{'sub': m-1', 'm', 'm', 'm', 'm', 'm-1, 'sup': +', 'th, 'selecting, from a set S1based on H, an antenna index nand an update coefficient αcorresponding to n, wherein S1is a set of columns that are unselected in antenna indexes of the M antennas until an (m−1)iteration ends;'}{'sub': m', 'm', 'm, 'sup': '+', 'determining a weight matrix Wbased on H and α; and'}{'sub': m', 'm', 'opt', 'm', 'opt, 'assigning a row that is in Wand that corresponds to nto a row that is in a final weight matrix Wand that corresponds to n, wherein Wis to adjust transmit powers of at least J of the M antennas to a preset transmit power P after the J iteration operations end.'}2. The method according to claim 1 , wherein a product of Hand Wis a diagonal matrix.3. The method according to claim 1 , wherein the determining of the weight matrix Wbased on H and αcomprises:{'sub': m', 'm', 'm-1', 'm', 'm', ' ...

Chemically foamed emulsion explosive composition and process for its preparation

A water-in-oil emulsion explosive composition con-taining inorganic nitrate and the process for its prepara-tion are disclosed herein. The composition is an explosive mixture which comprises a disperse phase formed of a speci-fically-recited aqueous inorganic oxidizer salt solution and a continuous phase formed of a specifically-recited hydrocarbon oil and emulsifier with emulsion foamer. By adjusting the pH of the disperse phase and of the emulsion foamer, a foaming process at elevated temperature is achieved. The explosive composition so provided is an industrial explosive and has lower production cost, excellent stability, good moisture resistance and low toxicity, and has a storage life longer than 10 months.

Method for measuring channel state information, and network-side device

Channel state information measurement method and apparatus and network side device

A channel state information measurement method and apparatus and a network side device are described. The measurement method includes configuring, by a network side device, channel state information reference signal (CSI-RS) transmit information of M access points. The CSI-RS transmit information is used to indicate the M access points to periodically send a CSI-RS to a first user equipment at a preset interval. The preset interval is a time interval and/or a subband interval, and M is an integer greater than 1. The network side device obtains channel state information (CSI) corresponding to each of the M access points. The CSI corresponding to the access point includes first CSI, and the first CSI is information that is measured based on the CSI-RS corresponding to the access point and fed back by the first user equipment.

Precoding method and apparatus

This application provides a precoding method and an apparatus for improving a power utilization of antennas. The method includes: determining a generalized inverse matrix Hm+ of a channel value matrix Hm of K users in an mth iteration in J iteration operations, where m=1, 2, . . . , and J, 1≤J≤M−K+1, and M is a quantity of antennas; selecting, from a set S1m-1 based on Hm+, an antenna index nm and an update coefficient αm corresponding to nm, where S1m-1 is a set of n unselected in antenna indexes n of the M antennas until an (m−1)th iteration ends; determining a weight matrix Wm based on Hm+ and αm; and assigning a row in Wm and corresponding to nm to a row in a final weight matrix Wopt and corresponding to nm, where Wopt is to adjust transmit powers of at least J of the M antennas to a preset maximum transmit power P after the J iteration operations end.

Channel phase correction method and related apparatus

This application provides a channel phase calibration method and a related apparatus. The method may include: A first communication device sends reference signals to a second communication device through a plurality of channels (610). The second communication device performs channel measurement by using the reference signals, and feeds back channel measurement information to the first communication device (620). The first communication device estimates a phase difference between a first channel and a second channel in the plurality of channels based on the channel measurement information fed back by the second communication device (630), and obtains, based on the phase difference between the first channel and the second channel, a phase compensation value of a channel other than the first channel and the second channel in the plurality of channels (640), to calibrate a phase of the channel other than the first channel and the second channel in the plurality of channels. Through cooperation between the first communication device and the second communication device, that is, according to an air interface calibration technical solution, a phase difference between channels can be calibrated without additional hardware.

Precoding method and apparatus

Method and device for measuring channel state information and network-side device

Channel phase calibration method and related apparatus

This application provides a channel phase calibration method and a related apparatus. The method may include: A first communication device sends reference signals to a second communication device through a plurality of channels. The second communication device performs channel measurement by using the reference signals, and feeds back channel measurement information to the first communication device. The first communication device estimates a phase difference between a first channel and a second channel in the plurality of channels based on the channel measurement information fed back by the second communication device, and obtains, based on the phase difference between the first channel and the second channel, a phase compensation value of a channel other than the first channel and the second channel in the plurality of channels.

Beam forming weight calculation method and related device

Embodiments of this application disclose a beamforming weight calculation method, including: determining X sub resource block groups, where one of the X sub resource block groups includes a part of a resource block group, all resource block groups in each sub resource block group are occupied by a user, and X is a positive integer greater than 1; determining, based on the X sub resource block groups, a beamforming weight calculation method used for each sub resource block group, where the beamforming weight calculation method includes normalized-eigen beamforming or power limited-eigen beamforming; and obtaining, based on the beamforming weight calculation method corresponding to each sub resource block group, a beamforming weight corresponding to the sub resource block group. For each sub resource block group, a corresponding beamforming weight calculation method is adaptively determined, and a corresponding beamforming weight is obtained. This effectively improves a power utilization ratio of downlink data sending in a communications apparatus, effectively improves spectral efficiency of a cell, and improves an average throughput of the cell.

Method and apparatus for improving multi-user multiplexing performance, device, and storage medium

The present disclosure discloses example method, apparatus, and storage medium for improving multi-user multiplexing performance. One example method includes configuring base sequence identifiers by a network device for a plurality of terminals by using radio resource control (RRC) signaling, where there is no orthogonality between base sequences indicated by the base sequence identifiers of the plurality of terminals. Sounding reference signal (SRS) detection is performed on the plurality of terminals based on a quasi-orthogonal sequence, to obtain channel information for sending an SRS by each terminal. Channel prediction is performed based on the channel information of each terminal, to obtain a channel prediction result of each terminal.

Channel phase correction method and related apparatus

Beamforming weight calculation method and related apparatus

Embodiments of this application disclose a beamforming weight calculation method, including: determining X sub resource block groups, where one of the X sub resource block groups includes a part of a resource block group, all resource block groups in each sub resource block group are occupied by a user, and X is a positive integer greater than 1; determining, based on the X sub resource block groups, a beamforming weight calculation method used for each sub resource block group, where the beamforming weight calculation method includes normalized-eigen beamforming or power limited-eigen beamforming; and obtaining, based on the beamforming weight calculation method corresponding to each sub resource block group, a beamforming weight corresponding to the sub resource block group. For each sub resource block group, a corresponding beamforming weight calculation method is adaptively determined, and a corresponding beamforming weight is obtained.

Data processing method and communication apparatus

This application provides a data processing method and a communication apparatus, and relates to the field of communication technologies. The method can be used for downlink data processing and uplink data processing. The communication apparatus may receive a reference signal, and obtain a first matrix based on the reference signal. The first matrix is an autocorrelation matrix whose dimension is N rows and N columns, and N indicates a quantity of channels of an antenna array. Based on the first matrix, channels in different rows of the antenna array are averaged to obtain a second matrix, where a dimension of the second matrix is N/(x×R) rows and N/(x×R) columns; R represents a quantity of channel rows of the antenna array; x represents polarization of the antenna array.

Data processing method, and communication device

This application provides a data processing method and a communication apparatus, and relates to the field of communication technologies. The method can be used for downlink data processing and uplink data processing. The communication apparatus may receive a reference signal, and obtain a first matrix based on the reference signal. The first matrix is an autocorrelation matrix whose dimension is N rows and N columns, and N indicates a quantity of channels of an antenna array. Based on the first matrix, channels in different rows of the antenna array are averaged to obtain a second matrix, where a dimension of the second matrix is N/(x×R) rows and N/(x×R) columns; R represents a quantity of channel rows of the antenna array; x represents polarization of the antenna array. When the antenna array is a single-polarized antenna array, x is 1. When the antenna array is a dual-polarized antenna array, x is 2. In this application, a dimension of the first matrix is reduced, to improve data processing efficiency. In addition, the channels in the different rows of the antenna array are averaged. In this way, impact of related interference between channel rows of the antenna array can be reduced.