582 results about "Precoding" patented technology

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 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.

The invention discloses a non-orthogonal polarization MIMO (Multiple Input Multiple Output) communication system, which belongs to the technical field of wireless communication and comprises a serial-parallel conversion and precoding module, a signal distribution network, a transmitting channel, a non-orthogonal transmitting array antenna, a non-orthogonal receiving array antenna, a receiving channel, a signal merging network and an MIMO signal detection module, a non-orthogonal transmitting antenna unit is arranged in the non-orthogonal transmitting array antenna, and a non-orthogonal receiving antenna unit is arranged in the non-orthogonal receiving array antenna. According to the invention, parallel transmission of multiple paths of signal streams can be realized under various channel conditions, and the transmission rate and the spectrum utilization rate of the system are improved.

This communication device may apply convolution precoding to a bit sequence, polar-encode the convolution-precoded bit sequence, and transmit same. When the size of a polar coder for convolution precoding is 2N, pre-determined values are mapped to last m bit indexes from among first N bit indexes in a bit sequence having the length of 2N, which is an input for the convolution precoding, and bit values of an information block are mapped to K bit indexes from among remaining (2N-m) bit indexes.

For a wireless transmit-receive unit (WTRU) moving between near field and far field (NF / FF) regions of a cell, the planar wave approximation used in the FF region may not be adapted to the NF region. Therefore, the WTRU may determine a transmission precoder type of a set of transmission precoder types, and at least one downlink (DL) reference signal (RS). The WTRU may perform one or more measurements based on the DL RS. The WTRU may determine a transmission precoder type from the set of transmission precoder types based on the one or more measurements meeting the associated conditions. The WTRU may transmit a report to the network, the report comprising an indication of the determined transmission precoder type, to be used by the network for DL transmissions to the WTRU, for improved reception of these transmissions by the WTRU in the region where the WTRU is located.

A method is performed by a network node for precoding of downlink communications predicting downlink channel state. The method receives a compressed-dimensional representation of a channel state that is encoded through an encoder neural network of a UE. The method maps the compressed-dimensional representation through a forward-prediction neural network to generate a compressed-dimensional predicted representation of a forward channel state at least one step forward in time k+Δ, wherein Δ is a number of steps forward in time. The method decodes the compressed-dimensional predicted representation of the forward channel state through a decoding neural network to generate an increased-dimensional predicted representation of the forward channel state, where the increased-dimensional predicted representation is a higher dimensional representation than the compressed-dimensional predicted representation. The method precodes signals for transmission through the downlink channel to the UE based on the increased-dimensional predicted representation of the forward channel state.

In an embodiment, a method implemented in a WTRU comprises receiving a first message comprising first information indicating a configuration of a set of precoders, a set of correction factors, association between each precoder of the set of precoders with at least one correction factor from the set of correction factors, and at least one RS; receiving at least one reference signal; determining a first precoder based on at least one measurement on the at least one RS; determining a subset of correction factors associated with the first precoder; determining a correction factor from the subset of correction factors; determining a second precoder based on the first precoder and the determined correction factor; and transmitting a second message comprising second information indicating the second precoder.

A wireless transmit / receive unit (WTRU) may receive a channel state information reference signal (CSI-RS) from a transmitter (e.g., via a reconfigurable intelligent surface (RIS)). The transmitter may be associated with the RIS. The WTRU may determine, based on the CSI-RS, channel information (e.g., channel vector information) associated with a first subset of elements of the RIS. The WTRU may determine, based on the channel information associated with the first subset of elements of the RIS, channel information (e.g., channel vector information) associated with a second subset of elements of the RIS. The WTRU may generate a CSI reporting parameter based on the channel information associated with the second subset of elements of the RIS. The WTRU may send the CSI reporting parameter. The WTRU may generate the CSI reporting parameter using a channel matrix associated with the RIS. The CSI reporting parameter may be a virtual CSI reporting parameter.

The present invention discloses a communication system including WLAN communication systems comprising transmitter including an OTFS grid based Orthogonal Time Frequency Space (OTFS) waveform generator and Multiple Input Multiple Output (MIMO) streams. The transmitter comprises signal processor including OTFS modulator having FEC (forward error correction) encoder for pre-FEC bit appended input data stream and transmission of encoded input data stream in a selective sequence vide OTFS waveform modulated OTFS grid-partially loaded with QAM / PSK symbols of said encoded input data stream through MIMO transmitter and receiver streams including MIMO pre-coder based multi antenna support for said transmission and reception of said OTFS waveform thereby enabling OTFS waveform transmission and retrieval of input data stream.

This disclosure provides systems, methods, and devices for wireless communication that support coherent joint transmission (CJT) channel state information (CSI) reporting with frequency domain (FD) compensation at a finer than subband size level. In a first aspect, a method of wireless communication includes a user equipment (UE) determining a plurality of CSI parameters for a set of N TRP transmission-reception points (TRPs). The UE may identify a reference TRP, calculate FD compensation for each FD compensation unit to compensate a precoder to each non-reference TRP and corresponds to a delay difference between the each non-reference TRP and the reference TRP. The UE then transmits a CSI report including the FD compensated precoder for each FD compensation unit, wherein the CSI report includes the precoder applicable to a total number of reported TRPs fewer than NTRP−1. Other aspects and features are also claimed and described.

A method for indicating precoding, performed by a network device, includes: sending single downlink control information (S-DCI), wherein the S-DCI is configured to schedule codebook-based physical uplink shared channel (PUSCH) transmission of a terminal from multiple panels to multiple transmission reception points (TRPs). A sounding reference signal resource indicator (SRI) indication field is carried in DCI scheduled by the S-DCI, and the SRI indication field indicates a sounding reference signal (SRS) resource combination configured for PUSCH transmission in an SRS resource set corresponding to a PUSCH, and indicates a respective spatial filter used by the terminal for the PUSCH transmission corresponding to a panel / TRP / transmission configuration indication (TCI) / PUSCH transmission occasion (TO).

This disclosure describes methods and systems for Physical Uplink Shared Channel (PUSCH) layer mapping, precoding, and mapping to resource elements in multi-panel UE (STxMP) operations. A method to be performed by a user equipment involves: generating one or more codewords for simultaneous transmission on a PUSCH via two antenna panels; generating precoded and modulated sequences based on the one or more codewords, where a first subset of the generated sequences is associated with a first antenna panel, and where a second subset of the generated sequences is associated with a second antenna panel; selecting a mapping scheme for mapping the generated sequences to resource elements arranged in frequency; and mapping, using the selected mapping scheme, the generated sequences to the resource elements, where the resource elements are scheduled to be transmitted during a transmission period.

A method of channel state information (CSI) report can include receiving a CSI report configuration at a user equipment (UE) from a base station, the CSI report configuration being associated with a set of CSI reference signal (CSI-RS) resources corresponding to multiple transmission reception points (TRPs), performing a channel measurement based on the CSI-RSs resources corresponding to the multiple TRPs, determining a precoder matrix indicator (PMI) based on measurement results of the channel measurement, the PMI corresponding to a precoder matrix, denoted W, of a Type II CSI codebook, the precoder matrix having a spatial domain (SD) basis vector matrix, denoted W1, SD basis selection of the SD basis vector matrix being TRP-specific, and transmitting a CSI report to the base station, the CSI report including the PMI.

This application discloses a signal transmission method and apparatus, to implement signal transmission by using a multi-stream DFT-s-OFDM waveform. The method includes: precoding N streams of signals based on a first codebook before sending, to obtain N1 precoded signals, where a quantity of non-zero elements in each row of the first codebook is 1, the first codebook causes a phase difference between two of the N streams of signals, and N and N1 are integers greater than 1; and sending the N1 precoded signals. A transmitting end introduces a phase offset between two transmit antenna ports in a precoding process, so that equivalent inter-stream interference is optimal after channel equalization is performed at a receiving end, to improve demodulation performance of the receiving end.

Wireless communications systems and methods related to wireless communications in a system are provided. A user equipment (UE) may receive from a base station (BS), an uplink (UL) scheduling grant indicating subband precoding information and a resource allocation spanning a plurality of subbands. The UE may determine a plurality of subband precoders based on the subband precoding information. Each precoder of the plurality of subband precoders may be associated with a subband of the plurality of subbands. The UE may transmit to the BS, an UL communication signal in the resource allocation using the plurality of subband precoders.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for reporting of precoders, in particular hybrid precoders for near-field and far-field operation. A wireless transmit / receive unit measures one or more downlink, DL, reference signals, RSs, to obtain a measurement result, determines, based on the measurement result, at least a first set of vectors, determines, based on the measurement result, at least a second set of vectors having complex valued elements, across which phase progression is non-linear, determines precoder information comprising at least the first set of vectors and the second set of vectors, and transmits, to a transmission reception point, information indicating the precoder information.

Techniques for wireless communications are disclosed. In one aspect, a user equipment (UE) derives a time-reversal (TR) precoder based at least in part on an estimated channel between a first UE and a second UE, and sends a TR-precoded sidelink (SL) positioning reference signal (PRS) to the second UE. The estimated channel can be based on channel state information (CSI) associated with a wideband (WB) reference signal (RS). The TR precoder can be based on transmission or reception on a SL communication channel between the first UE and the second UE.

The present application relates to the technical field of communications, and discloses a sensing processing method and apparatus, a terminal, and a network-side device. The sensing processing method of the embodiments of the present application comprises: a first node performing a first sensing measurement on the basis of a first signal to obtain first information, the first information comprising second information and a first mapping relationship, the first mapping relationship being a mapping relationship between at least some content in the second information and at least one resource amongst first resources, and the first resources being configured for performing the first sensing measurement; the first information is used for determining at least one of sensing precoding and first parameter configuration information, and the first parameter configuration information is used for executing a target sensing service on the basis of the sensing precoding; and the first node is a sensing node receiving the first signal.

Methods, systems, and devices for wireless communications are described. A wireless communications system may support non-codebook-based precoding based on downlink channel predictions. A user equipment (UE) may receive control signaling indicating a channel state information (CSI) reference signal (CSI-RS) and a sounding reference signal (SRS) resource. The control signaling may instruct the UE to transmit an SRS via the SRS resource. The control signaling may indicate a differential value indicating a time after the SRS resource at which the UE is to predict CSI. The UE may receive, via the CSI-RS resource, a CSI-RS. The UE may transmit, via the SRS resource, the SRS that is precoded based on predicted CSI for a wireless channel resource that occurs in time after the SRS resource. The predicted CSI may be based on the CSI-RS.

Embodiments of the present disclosure relate to methods and apparatuses for transform precoding on a physical uplink shared channel (PUSCH). According to some embodiments of the disclosure, a user equipment (UE) may include a processor and a transceiver coupled to the processor; and the processor is configured to: receive signaling indicating switching from a transform precoding state to another transform precoding state, wherein the signaling would take effect for one or more physical uplink shared channel (PUSCH) transmissions of a PUSCH repetition or a transmission block processing over multiple slots (TBoMS), wherein the one or more PUSCH transmissions of the PUSCH repetition or the TBoMS are after a PUSCH transmission of the PUSCH repetition or the TBoMS firstly appeared in a time domain; determine whether the signaling takes effect or not for the one or more PUSCH transmissions of the PUSCH repetition or the TBoMS; and transmit the one or more PUSCH transmissions of the PUSCH repetition or the TBoMS in accordance with the first transform precoding state or the second transform precoding state based at least in part on the determination.

The invention discloses a DMRS transmission method, a terminal and network side equipment, and belongs to the technical field of communication, and the DMRS transmission method comprises the steps that the terminal determines first information; the terminal receives a demodulation reference signal (DMRS) used for channel state information (CSI) measurement according to the first information; wherein the first information comprises at least one of the following items: the resource occupied by the DMRS for CSI measurement; the transmission power of the DMRS used for CSI measurement; the transmission configuration of the DMRS for CSI measurement indicates a TCI state; the pre-coding of the DMRS used for the CSI (Channel State Information) measurement is carried out; and the CSI measurement of the DMRS used for CSI measurement is enabled.

A method performed by a first network node is provided. The method is for handling Sounding Reference Signal, SRS, configurations in a wireless communications network. The first network node is comprised in a group of network nodes together with one or more second network nodes. The first network node shares (202) a set of SRS configurations in the group of network nodes. The set of SRS configurations comprises SRS resources to be used for SRS interference measurements. The set of SRS configurations is to be used by the network nodes in the group of network nodes to configure User Equipments, UEs. The UEs to be configured are UEs that are identified to be Downlink, DL, heavy traffic UEs comprising DL data, which has an estimated download time that exceeds a threshold. When the first network node obtains (203) data to be transmitted to a first UE, it measures (204) SRS interference. The SRS interference is measured on SRS transmitted by each respective UE identified to be a DL heavy traffic UE by the respective one or more second network nodes. The respective measuring of 15SRS interference is performed on resources according to an SRS configuration out of said shared SRS configuration set. The first network node then selects (205) a precoder for the data to be transmitted to the first UE, based on the measured SRS interference.

A user equipment is a user equipment for performing wireless communication with a node in a mobile communication system, the user equipment including: a receiver that receives a first reference signal transmitted by the node; a controller that measures a resource of the first reference signal, calculates a precoder to be used for transmitting a physical uplink shared channel based on the measurement of the resource of the first reference signal, and applies the precoder to the physical uplink shared channel; and a transmitter that transmits, to the node, the physical uplink shared channel to which the precoder has been applied.

A terminal according to one aspect of the present disclosure comprises: a receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency part and indicating an SRS Resource Indicator (SRI) and a second field corresponding to a second frequency part and indicating an SRI; and a control unit that determines that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field. According to said one aspect of the present disclosure, a TPMI or SRI instruction can be appropriately issued.

Example implementations include a method, apparatus and computer-readable medium of wireless communication by a user equipment, comprising receiving, from a network entity, an indication to reduce a number of antenna ports associated with uplink precoding. The implementations further include transmitting, to the network entity, a reference signal using the reduced number of antenna ports. The implementations further include receiving, from the network entity, a message indicating a Transmit Precoder Matrix Indicator (TPMI) associated with the reduced number of antenna ports.

There is provided mechanisms for transmission of reference signals. A method is performed by a terminal device. The terminal device comprises at least two physical antenna ports. The method comprises obtaining channel information. The method comprises determining, for at least one given precoder in a codebook, an uplink reference signal to physical antenna port mapping based on the channel information. The method comprises transmitting uplink reference signals in the physical antenna ports according to the determined mapping.

This application provides a communication method and a communication apparatus. The method may include: a first apparatus receiving first indication information from a second apparatus, the first indication information being used to instruct the first apparatus to transmit a precoding of a first reference signal, the precoding of the first reference signal being associated with channel-related information of multiple first apparatuses served by the second apparatus. In this method, the precoding of the first reference signal transmitted by a terminal device may be indicated by a network device, and the precoding is associated with channel-related information of multiple terminal devices served by the network device. Therefore, the network device can determine the precoding of the first reference signal based on the channel-related information of the multiple terminal devices served by the network device. Through the design of the precoding by the network device, the first reference signal transmitted by each terminal device can be distinguished during transmission. Based on this, pilot interference between the first reference signals of different terminal devices can be avoided, and the accuracy of channel measurement can be improved.

An access point (AP) may include a transceiver and a processing device. The transceiver may be operable to communicate with at least a second AP and at least a first station (STA). The processing device may be operable to transmit a null data packet announcement and a joint null data packet from the AP and the second AP. The processing device may also be operable to request a sounding feedback from the first STA. The processing device may further be operable to obtain a channel estimation feedback from the second AP. The processing device may also be operable to perform a precoder calculation using the sounding feedback and the channel estimation feedback. The processing device may further be operable to provide the precoder calculation to the second AP.