544 results about "Precoding matrix" patented technology

Example embodiments of the present disclosure relate to methods, devices, and computer storage medium for communication. A method for communication comprises determining, at a terminal device, whether to apply Doppler / time domain compression or a Doppler / time domain basis type for reporting a precoding matrix indicator (PMI) to a network device. The method further comprises transmitting, to the network device, an indication of whether to apply the Doppler / time domain compression or the Doppler / time domain basis type. In this way, it is more flexible to switch between high / medium mobility and low mobility. Therefore, communication performance for high / medium mobility terminal devices can be improved, without increasing overhead for low mobility terminal devices.

A communication method includes the following. A terminal device sends a first physical uplink shared channel (PUSCH) and a second PUSCH. The terminal device corresponds to N sounding reference signal (SRS) resource sets, the first PUSCH is associated with a first SRS resource set among the N SRS resource sets, the second PUSCH is associated with a second SRS resource set among the N SRS resource sets, and the first SRS resource set is different from the second SRS resource set. The terminal device includes M antenna ports. A first precoding matrix for the first PUSCH and a second precoding matrix for the second PUSCH belong to a first precoding matrix set, a non-zero element in a column vector of each precoding matrix in the first precoding matrix set is less than or equal to M / N, and M and N are integers greater than or equal to 2.

A method and apparatus for performing uplink transmission and reception in a wireless communication system are disclosed. According to an embodiment of the present disclosure, a method for performing uplink transmission in a wireless communication system may include: transmitting capability information related to a codebook subset for uplink transmission supported by the UE to a base station; receiving configuration information related to a codebook subset based on the capability information from the base station; and performing the uplink transmission based on the configuration information, and the capability information includes a first type of partial coherent codebook subset or a second type of partial coherent codebook subset, and the first type of partial coherent codebook subset includes at least one first precoding matrix having four zeros and four non-zero values per column, and the second type of partial coherent codebook subset includes at least one second precoding matrix having six zeros and two non-zero values for each column.

Methods and apparatuses for PUSCH transmission for partial coherent UE with 8 antenna ports are disclosed. In one embodiment, a UE comprises a transceiver and a processor coupled to the transceiver, wherein the processor is configured to receive, via the transceiver, a DCI scheduling a PUSCH, wherein the DCI includes an antenna port(s) field indicating the number of DMRS ports that determines a rank of the scheduled PUSCH, and the DCI further includes a TPMI field indicating one or two precoding matrices; and determine the precoding matrix for the scheduled PUSCH according to the rank and the one or two precoding matrices.

The invention discloses a joint distributed precoding and beamforming method for RIS-assisted cellular removal large-gauge MIMO (Multiple Input Multiple Output) under electromagnetic interference (EMI). Specifically, the method comprises the following steps: constructing an RIS-assisted cellular-removal large-scale MIMO downlink model under electromagnetic interference; a distributed processing framework based on joint optimization is provided, and a combined vector, a transmitting end active precoding matrix and RIS passive beam forming are received through collaborative design; an efficient distributed alternating optimization algorithm is developed, and a minimum system weighted mean square error (MSE) is taken as a target function. Compared with a traditional centralized algorithm, the scheme provided by the invention has the advantage that the calculation complexity is reduced while the similar performance is kept. A simulation experiment shows that compared with other reference schemes, the scheme can effectively improve the system performance under electromagnetic interference, and the reliability and practicability of the method in a complex electromagnetic environment are verified.

Methods, systems, and devices for wireless communications are described. A UE may receive one or more control messages that indicate a quantity of a set of sounding reference signal (SRS) resource sets configured for codebook usage and at least one maximum rank value associated with uplink shared channel transmissions by the UE. The UE may receive downlink control information (DCI) with an SRS resource indicator (SRI) field and a transmit precoding matrix indicator (TPMI) field. The UE may then interpret the SRI and TPMI fields according to a mapping that is based on the maximum rank value and a maximum quantity of ports the UE is capable of supporting. Then, the UE may transmit the uplink shared channel message in accordance with the mapping.

A method of wireless communication includes determining a first precoding matrix indicator (PMI) value and a second PMI value, the first PMI value indicating a first matrix W1 of a first codebook C1, the second PMI value indicating a second matrix W2 of a second codebook C2, wherein the first matrix W1 and the second matrix W2 together define a precoding matrix W for multi-antenna transmission. The method also includes transmitting the first PMI value at a first periodicity, and transmitting the second PMI value at a second periodicity shorter than the first periodicity. In some examples, the method also includes transmitting a rank indicator (RI) value, where the first PMI value and the second PMI value are determined based on the RI value.

Systems and methods related to prioritization of non-zero coefficients for Channel State Information (CSI) for Coherent Joint Transmission (CJT) are disclosed. Embodiments of a UE and corresponding embodiments of a method performed by a UE for CJT CSI feedback in which non-zero coefficients of a precoding matrix indicator (PMI) feedback are prioritized are disclosed. Embodiment of a network node and corresponding embodiment of a method performed by a network node for CJT CSI feedback in which non-zero coefficients of a PMI feedback are prioritized are also disclosed.

Systems and methods to support Physical Uplink Shared Channel (PUSCH) multi-Transmission / Reception Point (TRP) scheduling are provided. In some embodiments, the wireless device performs one or more of: obtaining a configuration for Transmission Configuration Indicator (TCI) states for Uplink (UL) PUSCH scheduling; activating / deactivating a subset of configured TCI states). If two TCI states are indicated, the wireless device transmits two different PUSCHs each corresponding to one of the indicated TCI states. If one TCI state is indicated, the wireless device transmits a single PUSCH corresponding to the indicated TCI state. The wireless device maps indicated TCI states to the transmission occasions or actual repetitions is preconfigured via higher layer parameter(s) or is given by a predefined rule. The wireless device applies a Transmitted Precoding Matrix Indicator (TPMI) to transmission occasions or actual repetitions associated with each indicated TCI state based on a signaled value and / or a predefined value.

The invention provides a robust hybrid beam forming method for cooperative communication of multiple low-orbit satellites, which relates to the technical field of satellite communication and comprises the following steps of: S1, constructing a joint optimization problem for joint beam forming and user scheduling; s2, the minimum channel gain of all users is maximized, when the number of satellite antennas is larger than a preset threshold value, the step S3 is executed, and otherwise, the step S5 is executed; s3, constructing a minimum signal to interference plus noise ratio maximization problem, and solving to obtain an optimal all-digital precoding matrix; s4, based on the optimal all-digital precoding matrix, constructing a digital-analog hybrid precoding matrix design problem to obtain a digital-analog hybrid precoding matrix; and S5, constructing and solving an analog pre-coding matrix design problem based on maximization of the signal leakage and noise ratio to obtain an optimal analog pre-coding matrix, and then solving an optimal digital pre-coding matrix. According to the invention, the overall performance and the service quality of the multi-low-orbit satellite communication network can be obviously enhanced.

A communication method, includes generating first channel information. The first channel information includes K segments, K is an integer greater than 1, a length of each of the K segments is less than or equal to a first threshold, a type of the first channel information is ground truth channel information, and the first channel information includes a channel response, a channel eigenvector matrix, a precoding matrix, reference signal received power, or a signal to interference plus noise ratio. The communication method also includes transmitting K pieces of UCI to a network device. The K pieces of UCI include the K segments.

Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control CHannel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

The invention discloses a nonlinear hybrid beam forming method and system in unmanned aerial vehicle communication and a storage medium. The method comprises the following steps: calculating a constraint condition of a hybrid precoding matrix of a transmitting end; constructing a target function of an analog precoding matrix of the transmitting end according to constraint conditions of the hybrid precoding matrix of the transmitting end and requirements of an optimal precoder; the optimal gradient iteration step number is calculated according to the relation between the historical gradient information and the time delay / or the spectrum efficiency and / or the energy efficiency; calculating an optimal solution of a transmitting end simulation precoding matrix objective function according to the optimal gradient iteration step number; obtaining a transmitting end hybrid precoding matrix according to the optimal solution of the transmitting end analog precoding matrix objective function; and performing hybrid beam forming according to the hybrid precoding matrix of the transmitting end. The method solves the problem that the loading capacity requirement and the real-time requirement of unmanned aerial vehicle communication cannot be met due to the fact that an existing millimeter wave hybrid beam forming technology is insufficient in spectrum efficiency, high in time delay and low in energy efficiency.

Embodiments of the present invention provide an uplink transmission method, a terminal, a network device, an apparatus, and a storage medium. The method comprises: receiving precoding matrix indication information; determining, from candidate precoding matrixes, a precoding matrix indicated by the precoding matrix indication information, the candidate precoding matrixes comprising a first type of matrixes and / or a second type of matrixes, the first type of matrixes being determined on the basis of a fully-coherent codeword and a zero matrix, and the second type of matrixes being determined on the basis of a partially-coherent codeword or a non-coherent codeword; and on the basis of the precoding matrix, performing uplink transmission.

The invention provides a multi-algorithm collaborative multi-channel optical module parallel debugging method, system and equipment, and the method comprises the steps: applying an orthogonal test sequence to multiple channels of an optical module in parallel at a system identification stage, synchronously collecting responses, and calculating a channel matrix representing all channel characteristics and mutual crosstalk at one time; in the pre-coding optimization stage, a pre-coding matrix used for actively suppressing crosstalk is calculated based on the channel matrix; in the reinforcement learning optimization stage, each channel is regarded as an independent agent, and a multi-objective collaborative optimization algorithm of reinforcement learning is adopted to search for a globally optimal solution for operation parameters; finally, the optimized operation parameters are written into an optical module register, performance verification is executed, and a debugging report is generated. Through closed-loop cooperation of three algorithms of system identification, precoding optimization and reinforcement learning optimization, efficient and adaptive parallel debugging of the multi-channel optical module is realized, the debugging efficiency and the overall performance of the system are improved, and the dependence on artificial experience is reduced.

The invention provides an Internet of Vehicles DNN collaborative reasoning method based on a rate splitting multiple access technology. The method comprises the following steps: S1, establishing an edge computing system model; s2, establishing a communication model; s3, based on a rate splitting multiple access strategy, a road side unit RSU divides the information sent to each group of vehicles into a public flow and a private flow, and distributes a precoding matrix for each group; s4, in combination with a given DNN partition strategy and an RSU computing resource allocation method, calculating the communication rate received by each vehicle by using a continuous convex approximation algorithm; s5, on the basis of the communication rate and RSU computing resources, constructing a directed acyclic graph model of a DNN reasoning task, expanding the model into a network flow graph, and performing task partitioning on the model by adopting a genetic algorithm to minimize reasoning time delay to obtain a corresponding edge-vehicle partition node set; s6, converting an optimization problem into a KKT condition, and solving an optimal allocation scheme of RSU computing resources; and S7, repeating the steps from S4 to S6, and carrying out iterative updating to obtain an optimal solution of the system.

Methods and apparatuses for UL precoding schemes for full coherent UE and non-coherent UE with eight antenna ports are disclosed. In one embodiment, a UE comprises a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to receive, via the transceiver, a DCI scheduling a PUSCH, wherein the DCI includes a TPMI field indicating information on a precoding matrix; and determine the precoding matrix for the scheduled PUSCH according to the TPMI field.

Methods and apparatuses for 8TX UE with two coherent antenna groups are disclosed. In one embodiment, a UE comprises a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to receive, via the transceiver, a control message scheduling a PUSCH transmission with transmission rank N to be transmitted by two antenna groups, wherein, the control message includes a TPMI that indicates two 4TX precoding matrices used by the two antenna groups, and the two 4TX precoding matrices are of the same type, wherein, N is any of 2 to 8; and transmit, via the transceiver, the scheduled PUSCH transmission according to the control message.

A method implemented in a wireless transmit and receive unit (WTRU) may include receiving one or more reference signals; a first codebook-based precoding matrix is selected based on the one or more reference signals, and a second precoding matrix is determined based on the one or more reference signals. The method may include determining a differential precoding matrix based on the first codebook-based precoding matrix and the second precoding matrix. The method may include determining a compressed differential precoding matrix based on the differential precoding matrix. The method may include transmitting feedback information indicating the compressed differential precoding matrix.

In an embodiment, a method performed by a User Equipment (UE) for Channel State Information (CSI) prediction can include receiving from a network node a configuration for a first CSI Reference Signal (CSI-RS) that has a first periodicity and a second set of CSI-RSs that have a second periodicity as channel measurement resources for a CSI report for Precoding Matrix 5 Indicator (PMI) prediction. The method can also include performing first channel measurements on the first CSI-RS, performing second channel measurements on the second set of CSI-RSs and then performing CSI computation resulting in computed CSI. The CSI computation can be based on either the combined first channel measurements and second channel measurements, or based on just the first channel measurements, or be based on just the second channel measurements. 0 Once the CSI is computed, a CSI report can be provided back to the network node.

The invention discloses an information transmission method and device, a terminal and network side equipment, and belongs to the technical field of communication, and the information transmission method comprises the steps that the terminal determines a second power scaling factor associated with at least one second base vector based on a first power scaling factor associated with at least one first base vector, the first base vector and the second base vector are both base vectors associated with a first precoding matrix of a codebook; the terminal determines CSI based on a first power scaling factor associated with the at least one first base vector and a second power scaling factor associated with the at least one second base vector; and the terminal reports the CSI.

Provided in the present application are communication methods, and an apparatus, which can reduce the feedback overhead of precoding matrix indicators (PMIs). A method comprises: a terminal device receiving first configuration information, and sending precoding matrix indicator (PMI) information, wherein the first configuration information is used for configuring reference signal resources corresponding to M ports, M being a positive integer, and the PMI information is determined on the basis of a channel measurement result of the reference signal resources, the PMI information indicates indexes of N ports among the M ports in a first polarization, N is a positive integer, and the PMI information is used for determining a precoding matrix corresponding to 2N ports.

A communication method and apparatus, which relate to the technical field of communications. In the method, a first communication apparatus can acquire a first precoding matrix, wherein the first precoding matrix comprises a first sub-matrix corresponding to a first spatial stream and a second sub-matrix corresponding to a second spatial stream, the vector, which corresponds to a first time-frequency unit in the first sub-matrix, being a first vector, and the vector, which corresponds to a first time-frequency unit in the second sub-matrix, being a second vector; the first communication apparatus calibrates the first precoding matrix to obtain a second precoding matrix, wherein the second precoding matrix comprises a third sub-matrix corresponding to the first spatial stream, the vector, which corresponds to a first time-frequency unit in the third sub-matrix, being a second vector; and the first communication apparatus sends first information, wherein the first information is obtained by means of compressing the second precoding matrix. The method can improve the compression efficiency of channel information (such as a precoding matrix) and improve the feedback performance of the channel information.

The application discloses a kind of mobile communication base station and communication method, communication method includes: communication base station sends pilot configuration instruction to user, carries out estimation to Doppler frequency offset, obtains phase-compensated received pilot signal, and is converted into vectorization received signal;Linear regression model is constructed, adaptive sparse channel estimation is carried out based on variational bayes inference, and output downlink frequency domain channel matrix, angle domain channel matrix;Angle domain channel matrix is quantized using Lloyd-Max non-uniform quantizer, and the global channel matrix of base station end is obtained;Output optimal analog precoding matrix and digital precoding matrix;Communication base station generates radio frequency signal based on precoding after transmission signal vector, and sends to user.Communication base station includes distributed antenna unit, baseband processing unit, radio frequency link and central control unit.The technical scheme of the application covers the whole process signal processing link of mobile communication base station, and the calculation complexity is low, and can be directly adapted to existing 3GPP standard and hardware platform.

The application provides a communication method and device, which can reduce the feedback overhead of a precoding matrix indication (PMI). The method comprises: a terminal device receiving first configuration information and sending precoding matrix indication (PMI) information; wherein the first configuration information is used for configuring reference signal resources corresponding to M ports, M being a positive integer; the PMI information is determined according to a channel measurement result of the reference signal resources, the PMI information indicating indexes of N ports on a first polarization in the M ports, N being a positive integer, and the PMI information being used for determining precoding matrices corresponding to 2N ports.

The invention, which relates to the technical field of integrated sensing and communication system optimization, discloses a method for optimizing an ISAC system with an adjustable sensing mode, and the method comprises the steps: constructing an ISAC system model which comprises a base station, a user, a sensing target and is based on a reconfigurable intelligent surface (RIS); calculating an importance score of each RIS unit according to the state information from the base station to the RIS channel and the state information from the RIS to the user channel, and determining a configuration strategy of an active reflection unit and a passive reflection unit based on the importance scores to form a mixed RIS structure; the weighted sum of the communication rate and the sensing beam gain of the ISAC system is used as a target optimization function of a hybrid RIS unit, and a complex reflection coefficient matrix of the RIS and a transmitting precoding matrix of a base station are jointly optimized under the constraint of the transmitting power of the base station, so that the ISAC system is optimized to operate in the optimal sensing mode. According to the optimization method, free adjustment of various modes of the ISAC system is realized, and the communication rate and the sensing beam gain are comprehensively improved.

A terminal according to one aspect of the present disclosure is characterized by comprising: a reception unit that receives a codebook setting; and a control unit that, on the basis of the codebook setting, controls reporting of a predicted precoding matrix indicator (PMI) that uses a number of Doppler domain basis vectors greater than two. According to one aspect of the present disclosure, highly accurate CSI reporting can be realized.

The present application relates to a codebook reporting method and apparatus, a device, and a storage medium. The method comprises: a UE performs feedback on the basis of a first codebook, wherein the first codebook comprises at least one codebook parameter set, the codebook parameter set comprises a first codebook parameter, the first codebook parameter comprises phase difference parameters corresponding to at least two measurement resources, and the first codebook parameter is reported on the basis of a first sub-band granularity. The method can enable a pre-coding matrix which is determined by an access network node on the basis of a measurement report of the UE to better match an actual channel.

Provided in the present application are a channel information feedback method, a channel information receiving method, and related apparatuses. The channel information feedback method provided in the present application comprises: a terminal device receiving first indication information, wherein the first indication information is used for indicating M space-frequency units for which the terminal device feeds back channel information, M being an integer greater than or equal to 1; and then, on the basis of the first indication information, the terminal device sending the channel information of the M space-frequency units, wherein the channel information of the M space-frequency units is obtained by means of measuring a first reference signal, the first reference signal is carried on N space-frequency units, and the M space-frequency units are some or all of the N space-frequency units, with N being an integer greater than or equal to 1. Therefore, a network device can conveniently perform inference on the basis of the channel information of the M space-frequency units, so as to obtain channel information of the N space-frequency units. A terminal device directly feeds back channel information of some space-frequency units, without the need to perform eigenvalue decomposition and DFT calculation on a downlink measurement channel so as to obtain a precoding matrix. Therefore, the terminal complexity is reduced.

Provided in the embodiments of the present application are a precoding method, an apparatus and a readable storage medium. The method comprises: a first communication apparatus acquiring first indication information, the first indication information being used for indicating a correspondence relationship between a waveform parameter and an SRS resource set; on the basis of the first indication information, determining a first SRS resource set and a second SRS resource set; performing computation to obtain a first precoding matrix and a second precoding matrix, the first precoding matrix being different from the second precoding matrix; on the basis of the first SRS resource set and the first precoding matrix, determining a first SRS signal, and, on the basis of the second SRS resource set and the second precoding matrix, determining a second SRS signal; sending the first SRS signal and the second SRS signal; receiving second indication information, the second indication information being used for indicating a determined SRS resource; and generating an uplink (UL) signal on the basis of the second indication information, and sending the UL signal. Implementing the embodiments of the present application can ensure that the PAPR gain is not compromised.