1221 results about "Precoding" patented technology

The apparatus may be a wireless device configured to estimate, for a first transmission in a first slot, a first channel associated with the first transmission, wherein the first transmission is associated with a first precoding, receive, in a second slot following the first slot, a second transmission associated with a second precoding, and estimate, based on the received second transmission and at least one of the received first transmission or the estimated first channel, a second channel associated with the second transmission.

Codebook-based precoding determination methods and apparatuses, and a device and a storage medium, which relate to the field of mobile communications. A codebook-based precoding determination method comprises: according to determined channel information corresponding to each channel status information (CSI)-RS resource, and codebook parameter information, a terminal sending CSI to a network device, wherein the CSI comprises indication information corresponding to a plurality of CSI-RS resources and indication information corresponding to each CSI-RS resource, or indication information corresponding to a plurality of port groups in one CSI-RS resource and indication information corresponding to each port group, and the CSI is used for determining precoding for the terminal on the basis vector of a codebook structure corresponding to the codebook parameter information.

A method for determining a precoding resource block group (PRG), a method for indicating a precoding resource block group (PRG), and a user equipment are provided. The method for determining a precoding resource block group (PRG) includes: receiving, by a user equipment, first information, where the first information includes at least one of configuration information or indication information that is used for determining a PRG granularity; and determining, by the user equipment, a PRG granularity of at least one downlink (DL) subband in a subband full duplex (SBFD) mode based on the first information.

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and / or a precoder matrix indicator, PMI, and / or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and / or the PMI and / or the RI.

Embodiments of the present disclosure relate to methods and devices for wake-up signals. A method implemented at a network device comprises forming an OOK subsequence with multiple OOK symbols that comprise at least one OOK ON-symbol and at least one OOK OFF-symbol. The multiple OOK symbols are associated with one OFDM symbol. The method further comprises mapping the OOK subsequence into multiple pre-Discrete Fourier Transform (pre-DFT) subsequences respectively to form a pre-DFT sequence, and performing transform precoding on the pre-DFT sequence. The method further comprises mapping output of the transform precoding into frequency resources allocated to a Wake-up Signal (WUS) and generating the WUS, and transmitting to a terminal device the WUS.

The present disclosure relates to a method performed by user equipment (UE) in a wireless communication system. Particularly, the method comprises the steps of: receiving, from a base station (BS), downlink control information (DCI) for simultaneous transmission across multiple panels (STxMP); and on the basis of association information between a phase tracking (PT)-reference signal (RS) port and a demodulation (DM)-RS port included in the DCI, to the BS, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port, wherein first information of the association information between the PT-RS port and the DM-RS port indicates a first DM-RS port associated with the first PT-RS port, from among DM-RS ports corresponding to at least one of a first sounding reference signal resource indicator (SRI) and first precoding information, and second information of the association information between the PT-RS port and the DM-RS port indicates a second DM-RS port associated with the second PT-RS port, from among DM-RS ports corresponding to at least one of a second SRI and second precoding information.

The invention discloses a signal transmission method and device based on orthogonal matrix precoding. The method comprises the steps that four chaotic sequences X, Y, Z and W are generated through a four-dimensional chaotic model according to a key initial value; performing bit interleaving on the original data by using X and W to obtain first data; performing serial-to-parallel conversion and QPSK mapping to obtain a mapping signal; scrambling the subcarriers and symbols of the mapping signals by using Y and Z to obtain encrypted data; carrying out IFFT (Inverse Fast Fourier Transform) on the encrypted data, adding a cyclic prefix, and carrying out parallel-serial conversion to obtain an encrypted data stream; performing binary conversion and serial-parallel conversion on the key initial value to obtain a square matrix K, and shaping the square matrix K by using a public key to obtain a key matrix; performing serial-to-parallel conversion, QPSK mapping, IFFT, cyclic prefix addition and parallel-to-serial conversion on the key matrix to obtain a key stream; and performing linear superposition on the encrypted data stream and the key stream through power distribution to obtain a power division multiplexing orthogonal frequency division multiplexing signal, and transmitting the power division multiplexing orthogonal frequency division multiplexing signal.

Provided is a method performed by a user equipment (UE). The method comprises: receiving, from a base station (BS), one or more messages comprising precoding information, wherein the precoding information is used by the UE to determine a precoder used in a codebook-based Physical Uplink Shared Channel (PUSCH) transmission; performing, by the UE, the codebook-based PUSCH transmission using eight antenna ports based on the precoder.

The invention discloses a multi-antenna joint precoding Gbit wireless transmission system, which relates to the technical field of wireless communication and comprises a frequency spectrum channel acquisition module, a signal preprocessing module, a precoding joint optimization module, a transmission performance evaluation module and a closed-loop parameter control module. The spectrum channel acquisition module acquires signal data and evaluates a transmission bit error rate and a signal-to-noise ratio by using a spectrum analyzer; the signal preprocessing module performs denoising and normalization and constructs a channel model; the precoding joint optimization module dynamically adjusts precoding and suppresses bit error diffusion; the transmission performance evaluation module calculates a data rate and optimizes protocol design; and the closed-loop parameter control module dynamically configures system parameters to guarantee closed-loop optimization. According to the method, the transmission efficiency and the stability of a Gbit wireless transmission system are remarkably improved, a complex channel environment is effectively dealt with, the bit error rate is reduced, the data rate is improved, a transmission protocol is optimized, intelligent dynamic adjustment of system parameters is realized, and the optimal performance of a multi-antenna joint precoding technology is ensured to be exerted.

The invention discloses an integrated waveform generation method and device based on transmission symbol compensation. The method comprises the following steps: generating an imitated radio frequency division multiplexing pilot signal; the simulated radio frequency division multiplexing pilot signal is sent to a receiving end, the receiving end is used for carrying out channel estimation on the simulated radio frequency division multiplexing pilot signal to obtain channel state information, and the channel state information comprises normalized time delay, normalized Doppler frequency shift or gain; according to the channel state information, pre-compensation processing is carried out on an imitated radio frequency division multiplexing information symbol on a target domain to obtain a compensation signal, and the target domain comprises a discrete affine Fourier transform domain or a time domain; and performing precoding processing on the compensation signal to obtain an integrated waveform. According to the invention, integrated waveform generation is realized, the efficiency is improved, and the signal processing complexity and resource overhead are reduced. The method can be widely applied to the technical field of wireless communication.

The apparatus may be a wireless device configured to estimate, for a first transmission in a first slot, a first channel associated with the first transmission, wherein the first transmission is associated with a first precoding, receive, in a second slot following the first slot, a second transmission associated with a second precoding, and estimate, based on the received second transmission and at least one of the received first transmission or the estimated first channel, a second channel associated with the second transmission.

Methods, systems, and devices for wireless communications are described. A first wireless device receives or transmits, from a second wireless device, first signaling indicating a size of a precoding resource block group and an offset parameter indicating an offset between the precoding resource block group and a codeblock. The first wireless device transmits or receives second signaling indicating a resource element starting parameter and a resource element ending parameter in at least one of a time domain and a frequency domain based at least in part on the size of the precoding resource block group. The first and second wireless devices communicate coded bit streams that are interleaved in accordance with at least one of the size of the precoding resource block group, the offset parameter, the resource element starting parameter, the resource element ending parameter, or any combination thereof.

This disclosure describes systems, methods, and devices for configuring an uplink transmission for a user equipment device (UE) using eight transmitters. A network device may encode a precoder rank indicator for use in an eight-transmitter uplink transmission by a UE device; encode a precoder indicator, indicative of a precoder type, for use in the eight-transmitter uplink transmission by the UE device; and encode downlink control information (DCI) for transmission to the UE device, the DCI including the precoder rank and the precoder indicator.

The invention provides a communication auxiliary sensing system and method based on an intelligent super surface (RIS). The communication auxiliary sensing system comprises a multi-antenna base station, a multi-user terminal and an active RIS. According to the system, an uplink pilot frequency and a data signal are jointly utilized, an expectation maximization (EM) algorithm is adopted to iteratively recover equivalent channel state information (CSI), and a Cramer-Rao bound (CRB) of sensing performance is deduced. Combined optimization of user precoding and RIS reflection coefficients is innovatively proposed under the uncertainty of CSI, so as to minimize CRB and guarantee user communication rate at the same time. An original problem is converted into a processable form by establishing a traversal MIMO spectrum efficiency compact lower bound, and efficient optimization is realized by combining a WMMSE method with a block coordinate descent (BCD) frame. According to the scheme, the sensing precision and the spectrum efficiency are remarkably improved, the method is suitable for an active RIS-assisted MU-MIMO network, and the technology can also be expanded to a traditional RIS-free system.

The invention provides a terahertz antenna structure and precoding method based on a mixed single-layer and double-layer delay line, and the method comprises the steps: firstly, analyzing the relation between the position of an antenna and the delay range of a delay line based on a single-layer delay line structure, and designing a brand new delay line deployment scheme; secondly, designing a mixed single-layer and double-layer delay line structure based on a brand new delay line deployment scheme, namely, adopting a single-layer delay line structure in the middle part of an antenna needing to provide small time delay, and adopting a double-layer delay line structure at two end parts needing to provide large time delay; then calculating the maximum time delay of the mixed single-layer and double-layer delay line structure, and quantifying the hardware complexity of the mixed single-layer and double-layer delay line structure based on the maximum time delay; and finally, designing a hybrid analog digital pre-coding scheme based on the hybrid single-layer and double-layer delay line structure. According to the invention, the hardware complexity and power consumption of the terahertz antenna structure are effectively reduced, and high spectrum efficiency is maintained.

The invention relates to a method for designing an ISAC system beam forming precoder based on RSMA assistance under an imperfect channel, and belongs to the technical field of communication perception integration. The method comprises the following steps: establishing an RSMA-assisted multi-user large-scale multiple-input single-output (MU-MISO)-based ISAC system model under ICSI, establishing an optimization problem model of beamforming precoder design and communication sensing resource allocation under the constraint of limited resources, channel uncertainty and satisfaction of communication rate and radar sensing estimation CRB, solving an optimization problem in a joint optimization model, and establishing a beamforming precoder design and communication sensing resource allocation optimization problem model under the constraint of limited resources, channel uncertainty and satisfaction of communication rate and radar sensing estimation CRB. The optimal system utility under the worst condition is obtained, the optimization problem in the joint optimization model is solved, and the optimal system utility under the general condition is obtained. The method has the advantages that the maximum improvement of the system utility under the general condition is realized, the target detection capability is remarkably enhanced while the fair rate of the user is improved, and a new solution is provided for the performance optimization and robustness transmission of the ISAC system.

Various aspects of the present disclosure relate to a user equipment (UE) that receives a channel state information (CSI) reporting setting. where the CSI reporting setting indicating CSI-reference signal (RS) transmissions over a channel measurement resource (CMR). The CSI-RS transmissions are associated with time units, and the CSI-RS transmissions correspond to two precoder matrix indicator (PMI) segments. The UE maps at least one PMI segment of the two PMI segments to the time units. and transmits a CSI report identifying the two PMI segments mapped to the time units.

A transmission method intended for an OMAMRC telecommunication system with M sources (s1, . . . , sM), possibly L relays and one destination, M≥2, L≥0. In such a solution, when a source could not be decoded by the destination, the latter organises a retransmission by taking into account the characteristics of a MIMO transmission channel established between, on the one hand, at least two nodes that decoded the source and, on the other hand, at least two antennas in reception of the destination in the form of a precoding coefficient. Thus, the method therefore makes it possible to improve the decoding performance of a source si, in a context where the destination is equipped with a plurality of antennas in reception.

Method performed by a UE for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB or a radio network node. The UE is operative to: estimate the MIMO channel between the gNB and the UE based on received DL reference signals for the configured resource blocks. The UE is further operative to calculate, based on a performance metric, a precoder matrix, for a number of antenna ports of the gNB and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling / combining one or more of vectors selected from a first codebook and a second codebook, and the UE is operative to report a CSI feedback and / or a PMI and / or a PMI / RI, to the gNB, used to indicate the precoder matrix for the configured antenna ports and resource blocks.

The embodiment of the invention provides a communication method and device, and is applied to the technical field of communication. According to the method, N reference signals and configuration information from network equipment are received through a terminal, and the configuration information is used for configuring the terminal to feed back M reference signal resource indications and rank indications and channel quality indications associated with the reference signal resource indications in a channel state information report, and the terminal performs channel measurement on the N reference signals based on the configuration information to obtain a channel state information report, and sends the channel state information report to the network equipment. Thus, a terminal can receive configuration information from network equipment to configure M reference signal resource indications required to be fed back in a channel state information report and rank indications and channel quality indications associated with each reference signal resource indication, therefore, the network equipment can determine proper hybrid precoding information according to the channel state information report so as to perform hybrid precoding on the data to be sent.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Methods and apparatus are provided for dynamic precoder determination in a wireless communication system. The method of a terminal comprises: receiving, from a base station, configuration information on a precoder resource block group (PRG) granularity; receiving, from the base station, downlink control information (DCI) including information indicating a size of a physical resource block (PRB) bundling; and identifying the PRG granularity based on the information and at least one downlink (DL) subband.

A method performed by a UE for generating a CSI report in a wireless communication system, including receiving from a network node, a CSI report configuration information including at least one parameter, D, for indicating a first basis set of D basis vectors used for constructing for each transmission layer a precoding vector or matrix for a rank set; identifying a precoding vector matrix for each transmission layer based on the first basis set, a second basis set comprising P basis vectors, and a number of combining coefficients for combining selected vectors from the first and second basis set; generating a CSI report based on the CSI report configuration information for a RI, or v of the rank set; and transmitting the CSI report to the network node.

The invention provides a method for determining precoding and related equipment. The method comprises: determining a first weight matrix according to a downlink reference signal and first information, a downlink channel comprising channels corresponding to m1 port groups, the first information being used for indicating the total number m2 of antenna ports included in each port group, and / or the first information being used for indicating the number of antenna ports of each port group in a first dimension and a second dimension, the first weight matrix is used for determining pre-codes corresponding to m1 * m2 antenna ports; and sending first indication information, wherein the first indication information is used for indicating the first weight matrix. According to the method, m1 * m2 antenna ports corresponding to a downlink channel are divided into m1 port groups, and each port group is mapped into a virtual port, so that pre-codes corresponding to the m1 * m2 antenna ports are determined through a weight matrix corresponding to one port group, the calculation complexity of generating the pre-codes is further reduced, and the indication overhead is reduced.

A precoding method, performed by a reconfigurable intelligent surface (RIS) array, includes determining a phase shift list corresponding to the RIS array, in which the phase shift list includes at least one row of phase shift sequence, the phase shift sequence includes a phase shift of each RIS array element in the RIS array, each row of phase shift sequence is configured to cause the RIS array to reflect an incident signal along a pair of reflection angles, and each row of phase shift sequence corresponds to one index value; acquiring a first index value from a user equipment (UE); determining a first phase shift sequence corresponding to the first index value from the phase shift list; and precoding the RIS array by configuring the phase shift of each RIS array element in the RIS array according to the first phase shift sequence.

There is provided a method at a network node of a communication network, comprising: receiving an uplink reference signal from a user equipment; estimating, based on the received uplink reference signal, delay information regarding a delay profile of a communication channel between the user equipment and the network node and spatial information regarding the communication channel; applying both the delay information and the spatial information in precoding of at least one downlink reference signal; transmitting the at least one precoded downlink reference signal to the user equipment; and receiving, from the user equipment as a response to the transmission of the at least one precoded downlink reference signal, channel information, the channel information indicating at least non-zero coefficients of at least one channel transmission layer.

Provided are a method and device for determining a power control parameter, and storage medium. The method includes: determining a beam state of an uplink transmission; and determining, based on the beam state, the power control parameter of the uplink transmission, where the beam state at least includes one of the following: a QCL state, a TCL state, spatial relation information, reference signal information, spatial filter information or precoding information.

A method for a terminal to transmit signals in a wireless communication system according to at least one of the embodiments disclosed herein comprises: transmitting terminal capability information related to 8 transmission antenna ports of the terminal; receiving downlink control information (DCI) for uplink scheduling including information about a transmission precoding index (TPMI); and transmitting an uplink signal on the basis of the DCI. The terminal capability information may include information for reporting an antenna port group supporting full power transmission among a plurality of antenna port groups composed on the basis of the 8 transmission antenna ports, and the transmission power of the uplink signal may be determined on the basis of whether the TPMI acquired through the DCI is related to the reported antenna port group.

A user equipment (UE) receives control signaling for an uplink MIMO transmission, the control signaling including a first TPMI field and a second TPMI field and an SRS resource set indicator and transmits the uplink MIMO transmission precoded with an 8 port uplink MIMO precoder, the 8 port uplink MIMO precoder being based on a 4 port uplink MIMO codebook with a mapping indicated by one or more of the first TPMI field, the second TPMI field, or the SRS resource set indicator.

Provided are a communication method and a related device, relating to the technical field of communications, a terminal device receiving N reference signals sent by a network device, N being an integer greater than 1; a terminal device sends a channel state information report to a network device, the channel state information report comprises a plurality of channel state information sets, each channel state information set comprises a reference signal resource indication and channel state information associated with the reference signal resource indication, and the number of the channel state information sets is less than or equal to N. Based on the above technical scheme, the terminal device can feed back the M reference signal resource indications and the channel state information associated with each reference signal resource indication to the network device in one channel state information report, so that the network device can determine appropriate hybrid precoding information according to the channel state information report. And performing hybrid precoding on the to-be-sent data.

A base station may identify a first antenna configuration of the base station and a second antenna configuration of a wireless device. The base station may select one or more codebook-based precoders for communication with the wireless device with LOS MIMO. The one or more codebook-based precoders may include at least one of a Legendre precoder, a block-DFT precoder, a DFT precoder, a block-Walsh precoder, a Walsh precoder, a block-Legendre precoder, a Kronecker Legendre precoder, a Kronecker block-DFT precoder, or a Kronecker block-Walsh precoder. The base station may transmit, to a wireless device, an indication of a second codebook-based precoder for transmission from the wireless device to the base station with LOS MIMO. The base station and the wireless device may communicate with each other with LOS MIMO based on one or more codebook-based precoders.