178 results about "Mimo transmission" patented technology

Methods and apparatuses for performing MIMO transmissions are described. Retransmission schemes are described for MIMO transmissions. In an example, a transmitter node obtains a plurality of packets to be transmitted to an intended receiver node over a plurality of MIMO layers. A set of one or more cross-block check blocks is generated, where the set of one or more cross-block check blocks being is using a plurality of bits selected from across two or more packets to be transmitted over respective two or more MIMO layers. The set of one or more cross-block check blocks is transmitted over one or more MIMO layers.

A user equipment (UE) receives control signaling for an uplink (UL) multiple input multiple output (MIMO) transmission and transmits the UL MIMO transmission precoded with an 8 port uplink MIMO precoder based on the control signaling and a set of two or more antenna port groups.

Techniques and apparatuses are described for multiple-input multiple-output transmissions using adaptive phase-changing devices. In aspects, a base station selects one or more adaptive phase-changing devices, APDs, to use in at least one communication path for multiple-input, multiple-output, MIMO, transmissions. The base station can perform a channel characterization process for the at least one communication path using the at least one APD and at least one UE. Based on results of the channel characterization process, the base station configures the at least one APD by which to implement single user-MIMO communication with a UE or multiple user-MIMO communication with multiple UEs. By so doing, the base station may implement MIMO transmissions using APDs to communicate with the at least one UE using same time and frequency resources, which can improve spectral efficiency of a wireless network.

Some demonstrative embodiments include apparatuses, systems and / or methods of communicating a Single-User (SU) Multiple-Input-Multiple-Output (MIMO) transmission. For example, a first wireless communication station may be configured to transmit a Request to Send (RTS) to a second wireless communication station via a plurality of SU MIMO Transmit (Tx) sectors of the first wireless communication station, the RTS to establish a Transmit Opportunity (TXOP) to transmit an SU-MIMO transmission to the second wireless communication station, a control trailer of the RTS including an indication of an intent to transmit the SU-MIMO transmission to the second wireless communication station; and to transmit the SU-MIMO transmission to the second wireless communication station, upon receipt of a Clear to Send (CTS) from the second wireless communication station indicating that the second wireless communication station is ready to receive the SU-MIMO transmission.

A user equipment (UE) may receive, from a base station, a configuration indicating a first orthogonal cover code (OCC) length that is 4 and a second OCC length that is 2 for demodulation reference signals (DM-RSs) communications between the base station and the UE. The UE may receive a signaling indicating the UE to communicate DM-RS(s) according to the first OCC length or the second OCC length. The UE may communicate, with the base station, a DM-RS according to the first OCC length or the second OCC length indicated by the signaling.

Some demonstrative embodiments include apparatuses, systems and / or methods of communicating a Single-User (SU) Multiple-Input-Multiple-Output (MIMO) transmission. For example, a first wireless communication station may be configured to transmit a Request to Send (RTS) to a second wireless communication station via a plurality of SU MIMO Transmit (Tx) sectors of the first wireless communication station, the RTS to establish a Transmit Opportunity (TXOP) to transmit an SU-MIMO transmission to the second wireless communication station, a control trailer of the RTS including an indication of an intent to transmit the SU-MIMO transmission to the second wireless communication station; and to transmit the SU-MIMO transmission to the second wireless communication station, upon receipt of a Clear to Send (CTS) from the second wireless communication station indicating that the second wireless communication station is ready to receive the SU-MIMO transmission.

Method and apparatus for supporting simultaneous MultiUser (MU) Multiple-Input Multiple-Output (MIMO) operations utilizing Orthogonal Frequency Division Multiple Access (OFDMA) with Uplink OFDMA Random Access (UORA). Access Points (APs) trigger and obtain short PPDUs from the stations to learn spatial filtering patterns that are utilized in adjusting antenna phase differences to obtain minimum / maximum energy from this BSR. The APs determine favored and unfavored directions of communication, which are conveyed to non-AP UORA stations as channel estimation signals. The UORA stations base broadcasting on strengths of channel estimation signals to determine eligible UORA resource units. The UORA procedure to secondary APs allows a primary AP to trigger a UL-MU MIMO transmission with the number of spatial streams exceeding the number of antennas at the primary AP.

For example, an apparatus may include a baseband controller configured to control a plurality of dual-polarization Radio Heads (RHs) to communicate a Multiple-Input-Multiple-Output (MIMO) transmission, the baseband controller configured to control a first dual-polarization RH of the plurality of dual-polarization RHs to communicate a first spatial stream of the MIMO transmission with a horizontal-polarization via one or more first dual-polarization antenna elements of the first dual-polarization RH, and to control a second dual-polarization RH of the plurality of dual-polarization RHs to communicate a second spatial stream of the MIMO transmission with a vertical-polarization via one or more second dual-polarization antenna elements of the second dual-polarization RH.

A communication method and device are suitable for the technical field of communication, such as a wireless local area network system supporting an IEEE 802.11 ax next generation Wi-Fi protocol, such as 802.11 be, Wi-Fi 7 or EHT, a 802.11 be next generation, such as 802.11 bn or Wi-Fi 8 or UHR, and 802.11 series protocols such as an integrated millimeter wave (IMMW) protocol, and can also be applied to a UWB-based wireless personal local area network system, a sensing system and the like. The communication method may comprise the steps that a first communication device generates a PPDU and sends the PPDU; the second communication device then receives the PPDU and learns that the transmission mode of the PPDU is a partial bandwidth MU-MIMO transmission mode based on the PPDU. According to the method, the throughput rate of the user is effectively improved, and the transmission efficiency is improved.

A method for determining an uplink multiple input multiple output (MIMO) transmission codeword, includes: determining at least one of a candidate codeword of 4 transmit antenna ports (Tx) for uplink MIMO transmission or a candidate codeword of 2 Tx for uplink MIMO transmission; dividing 8 Tx into K antenna port groups, wherein K is a positive integer less than 8; determining a third codeword from the candidate codeword, and determining a fourth codeword corresponding to the third codeword; and obtaining a first codeword for the antenna partial coherence transmission of 8 Tx L-layer for the uplink MIMO transmission by splicing, based on the antenna port groups and a co-phasing coefficient, the third codeword and the fourth codeword, wherein L is less than or equal to 8.

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.

Systems, methods, apparatuses, and computer program products for enabling efficient cell-free MIMO transmissions. A method may include receiving a downlink reference signal; determining at least one cell-free multiple-input multiple-output transmission policy associated with at least one access point based at least on the downlink reference signal; and transmitting at least one of the at least one cell-free multiple-input multiple-output transmission policy and enabling information to a network entity.

Systems, methods, apparatuses, and computer program products for enabling efficient cell-free MIMO transmissions. One method may include receiving a downlink reference signal, determining at least one cell-free multiple input multiple output transmission strategy associated with at least one access point based upon at least the downlink reference signal, and transmitting to a network entity at least one of the at least one cell-free multiple input multiple output transmission strategy and enabling information.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a base station may send and a user equipment (UE) may receive downlink control information (DCI) that schedules uplink multiple-input multiple-output (MIMO) communications. The UE and the base station may send and receive uplink MIMO communications using a default sounding reference signal (SRS) resource configuration based at least in part on the UE receiving the DCI before a medium access control (MAC) control element (MAC‑CE) selects a subset of uplink TCI states included in a pool of uplink transmission configuration indication (TCI) states configured for the UE. Many other aspects are provided.

Provided is a system capable of increasing the capacity of a feeder link in an LoS environment between a GW station and a relay station that is mounted to a communication relay device in the sky. This system comprises: a communication relay device in which a relay station of a non-reproduction relay system is mounted to a flying body or a floating body located in the sky; and a gateway station on the ground or on the sea, the gateway station performing feeder link communication with the communication relay device. The system relays communication between a user device and a base station device. The gateway station performs, via a feeder link array antenna, feeder link wireless communication to the relay station by means of a MIMO transmission method using a feeder link frequency in a first frequency band. The relay station performs, via the feeder link array antenna, feeder link wireless communication to the gateway station by means of the MIMO transmission method using the feeder link frequency in the first frequency band.

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.

A method and system are disclosed for optimizing downlink multi-user multiple-input multiple-output (MU-MIMO) transmission in time division duplex (TDD) wireless communication systems. Sounding reference signals (SRS) from user equipment (UEs) are processed using a machine-learned model to extract physical-layer channel characteristics, including Doppler spread, delay profile, and signal-to-noise ratio (SNR). Based on these features, a channel state information (CSI) acquisition operation is adaptively selected for each UE—either channel estimation (CE) alone or both CE and channel prediction (CP). When CP is used, prior channel estimates are analyzed to generate predicted CSI over a future interval. The obtained CSI is then used to configure MU-MIMO transmission parameters such as beamforming weights, modulation and coding schemes (MCS), and UE grouping. This adaptive framework improves performance in time-varying and high-mobility environments by ensuring timely and reliable CSI is used for downstream transmission decisions.

Some demonstrative embodiments include apparatuses, systems and / or methods of communicating a Single-User (SU) Multiple-Input-Multiple-Output (MIMO) transmission. For example, a first wireless communication station may be configured to transmit a Request to Send (RTS) to a second wireless communication station via a plurality of SU MIMO Transmit (Tx) sectors of the first wireless communication station, the RTS to establish a Transmit Opportunity (TXOP) to transmit an SU-MIMO transmission to the second wireless communication station, a control trailer of the RTS including an indication of an intent to transmit the SU-MIMO transmission to the second wireless communication station; and to transmit the SU-MIMO transmission to the second wireless communication station, upon receipt of a Clear to Send (CTS) from the second wireless communication station indicating that the second wireless communication station is ready to receive the SU-MIMO transmission.

A method of determining a lower bound on users' speed for efficient SRS resource handling for MU-MIMO transmission includes determining an eNodeB (eNB) or gNodeB (gNB) timing of a subframe; determining a User Equipment (UE) timing of the subframe; calculating a timing advance type corresponding to a Round Trip Time (RTT); calculating a distance to a base station corresponding to the Round Trip Time (RTT); calculating a distance traveled by a UE between two points based on the distance to the base station; calculating a user speed based on the distance traveled by the UE; deriving a lower bound based on the user speed; and filtering users that exceed the lower bound on user speed. The filtered users may be not assigned SRS. The non-filtered users may be assigned SRS and may subsequently be sent MU-MIMO transmissions.

A method for operating a user equipment (UE) comprises: receiving information associated with a channel state information (CSI) report, the information including a third-domain (TD) parameter N, where N>1; determining spatial domain (SD) basis vectors; determining frequency domain (FD) basis vectors; determining coefficients; wherein at least one of the SD basis vectors, the FD basis vectors, and the coefficients are determined independently for each dimension of the TD or determined jointly for all dimensions of the TD; and transmitting the CSI report including a precoding matrix indicator (PMI), the PMI indicating the SD basis vectors, the FD basis vectors, and the coefficients.

Techniques and apparatus for radio frequency (RF) exposure compliance for multiple-input, multiple-output (MIMO) transmissions are described. An example method that may be performed by a wireless device includes determining a respective multiple-input, multiple-output (MIMO) transmit power limit for each of a plurality of antennas of the wireless device. A signal associated with a MIMO transmission is transmitted from each antenna at a respective first transmission power level based on the respective MIMO transmit power limit for the antenna in compliance with a radio frequency (RF) exposure limit. The first transmission power level used for a first antenna of the plurality of antennas is different from the first transmission power level used for a second antenna of the plurality of antennas.

To provide a system that can increase the capacity of a feeder link in a LoS environment between a relay station mounted on a communication relay device in the sky and a GW station.SOLUTION: A system comprises: a communication relay device in which a relay station using a non-regenerative relay method is mounted on a flying body or floating body located in the sky; and a gateway station which is located on the ground or sea to communicate with the communication relay device via a feeder link. The system relays communication between a user device and a base station device. The gateway station performs wireless communication of the feeder link in the MIMO transmission method using feeder link frequencies in a first frequency band with the relay station via an array antenna for feeder link. The relay station performs wireless communication of the feeder link in the MIMO transmission method using feeder link frequencies in the first frequency band with the gateway station via the array antenna for feeder link.SELECTED DRAWING: Figure 1

Some demonstrative embodiments include apparatuses, systems and / or methods of communicating a Single-User (SU) Multiple-Input-Multiple-Output (MIMO) transmission. For example, a first wireless communication station may be configured to transmit a Request to Send (RTS) to a second wireless communication station via a plurality of SU MIMO Transmit (Tx) sectors of the first wireless communication station, the RTS to establish a Transmit Opportunity (TXOP) to transmit an SU-MIMO transmission to the second wireless communication station, a control trailer of the RTS including an indication of an intent to transmit the SU-MIMO transmission to the second wireless communication station; and to transmit the SU-MIMO transmission to the second wireless communication station, upon receipt of a Clear to Send (CTS) from the second wireless communication station indicating that the second wireless communication station is ready to receive the SU-MIMO transmission.

Various aspects of the present disclosure provide systems and methods for supporting multi-layer data transmissions, aimed at enabling multiple input multiple output (MIMO) transmissions or multi-layer transmissions at an earlier point in time, for example, immediately after or during an initial access procedure. An apparatus (e.g., user equipment), in response to a request from a network device (e.g., a base station), may generate a channel state information (CSI) report based on measurements of a synchronization signal-physical broadcast channel (SS-PBCH) block (SS-PBCH block, SSB) transmitted over a plurality of antenna ports. The CSI report may include information related to a device-specific CSI and / or information indicating a sub-channel quality. The network device may send configuration information related to the CSI report, a measurement configuration of the SSB, and / or a configuration supporting early MIMO transmissions. The method shown in the present invention reduces a large delay between SSB detection and MIMO transmission during the initial access process.

An example aspect comprises selecting an azimuth mode for an OAM MIMO transmission by a transmitter that includes a first number of circles that each include a second number of antenna elements, wherein the azimuth mode defines a DFT vector of a size less than or equal to the second number; selecting, from a plurality of radial modes associated with the azimuth mode, a radial mode for the transmission, wherein the radial modes include at least a first radial mode defining a first beamforming vector and a second radial mode defining a second beamforming vector, wherein each one of the first and second beamforming vectors includes the DFT vector weighted and repeated for a number of times less than or equal to the first number, wherein the first and second beamforming vectors are orthogonal to each other; and transmitting a signal using a beam configured according to the radial mode.

Disclosed in the embodiments of the present application are a codeword determination method for 8-antenna-port multi-antenna panel of uplink MIMO transmission, and an apparatus therefor, which can be used in a communication system. The method comprises: determining a candidate codebook for a 4-antenna-port and / or 2-antenna-port corresponding to uplink MIMO transmission; and determining panel configuration information of an 8-antenna port multi-antenna panel of uplink MIMO transmission; and on the basis of the candidate codebook and the panel configuration information, determining codewords of the L layers of the 8-antenna-port multi-antenna panel. In the embodiments of the present application, high-dimensional 8-antenna-port antenna full-coherent transmission codewords can be constructed on the basis of low-dimensional antenna full-coherent transmission codewords, such that the requirements of the uplink MIMO supporting one layer to eight layers of transmission for the 8-antenna-port can be satisfied, thereby further enhancing the uplink MIMO technology.

Systems and methods described provide a multiple-input multiple-output (MIMO) optimization service. A network device in a RAN predicts high usage thresholds and available per-service resources for supporting MIMO transmissions. The network device identifies, based on the predicted usage thresholds, user equipment (UE) devices that have a high-throughput session and have high usage levels on a cell. The network device assigns, based on the predicted available per-service resources, sounding reference signal (SRS)-based MIMO resources to the UE devices in the cell and assigns codebook-based MIMO resources to other UE devices in the cell.

Aspects of the present disclosure provide systems and methods for supporting multi-layer data transmission. An apparatus (e.g. user equipment), upon request of a network device (e.g. base station), may generate a channel state information (CSI) report based on measurement of synchronization signal-physical broadcast channel (SS-PBCH) blocks (SSBs) transmitted over multiple antenna ports. The CSI report may include information related to apparatus-specific CSI and / or information indicative of quality of sub-channels. The network device may transmit configuration information related to the CSI report, measurement configuration of the SSBs, and / or configurations for supporting early MIMO transmission.

The present disclosure provides an apparatus and method in a wireless communication system, and a computer-readable storage medium. The apparatus includes a processing circuit, which is configured to: decode a group common physical downlink control channel (group common PDCCH) of a group of user equipment including a target user equipment to obtain control information about multi-user-multiple-input-multiple-output (MU-MIMO) transmission of the control channel; and based on the control information, decode the user-specific physical downlink control channel (UE-specific PDCCH) of the target user equipment to obtain exclusive transmission control information about the target user equipment, wherein the UE-specific PDCCH of the target user equipment is superimposed on the same transmission resource for transmission with the UE-specific PDCCH of other user equipment. According to at least one aspect of an embodiment of the present disclosure, MU-MIMO transmission of the downlink control channel is effectively implemented, thereby improving resource utilization.

Methods and an apparatus are disclosed for orthogonal frequency division multiplexing (OFDM) and / or single carrier (SC) based multiple input multiple output (MIMO) hybrid beamforming (HBF) including determining the capabilities of a station (STA) such as the capability for hybrid beamforming, single user MIMO (SU-MIMO), and multi user MIMO (MU-MIMO). An announcement frame with a control trailer may be transmitted to signal a transmission configuration. The announcement frame may be a grant frame or a request to send (RTS) frame if the STA is SU-MIMO capable or a RTS frame or a DMG clear to send (CTS)-self frame if the STA is MU-MIMO capable. One or more directional multi-gigabit (DMG) antennas may be configured based on the announcement frame. One or more sounding symbols may be transmitted and feedback may be provided based on the sounding symbols. An HBF signal may be transmitted based on the sounding symbol(s) and / or feedback.