131 results about "Mimo communication" patented technology

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.

Methods related to wireless communication systems and uplink (UL) rank adaptation are provided. A user equipment (UE) receives, from a base station (BS), a configuration indicating a resource associated with a plurality of UL reference signal ports. The UE determines, based on at least one of an overheating status, a throughput, or a latency, a quantity of transmission layers for a transmission. The UE transmits, to the BS, an indication of at least one of (1) one or more UL reference signal ports of the plurality of UL reference signal resources associated with the UL reference signal resource based on the quantity of transmission layers, or (2) a number of UL reference signal ports associated with the multi-port UL reference signal resource based on the quantity of transmission layers.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit an indication of a capability of the UE to communicate in accordance with a polar multi-layer coding (MLC) multiple input multiple output (MIMO) communication scheme. The UE may receive a configuration for communication in accordance with the polar MLC MIMO communication scheme, wherein the configuration indicates a sub-block size threshold. The UE may communicate a message in accordance with the polar MLC MIMO communication scheme based at least in part on a determination that a sub-block size for the message satisfies the sub-block size threshold.

The apparatus may be a wireless device such as a UE configured to receive an indication of at least one shaping operation associated with one or more additional wireless devices in a plurality of wireless devices, where each of the plurality of wireless devices is associated with MU-MIMO communication, and where the first wireless device is included in the plurality of wireless devices. The apparatus may be configured to receive a DL transmission associated with the MU-MIMO communication, perform a demodulation of the DL transmission based on the indication, and output a result of the demodulation of the DL transmission for at least one of a transmission to at least one other wireless device or a local storage at the first wireless device.

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

Methods related to wireless communication systems and uplink (UL) rank adaptation are provided. A user equipment (UE) receives, from a base station (BS), a configuration indicating a resource associated with a plurality of UL reference signal ports. The UE determines, based on at least one of an overheating status, a throughput, or a latency, a quantity of transmission layers for a transmission. The UE transmits, to the BS, an indication of at least one of (1) one or more UL reference signal ports of the plurality of UL reference signal resources associated with the UL reference signal resource based on the quantity of transmission layers, or (2) a number of UL reference signal ports associated with the multi-port UL reference signal resource based on the quantity of transmission layers.

The invention relates to the technical field of wireless communication, and discloses a design method of an interference-minimized communication-sensing integrated waveform, which comprises the following steps of: determining parameter data of an MIMO communication-sensing integrated system so as to obtain a communication channel matrix at a transmitting end and construct a radar sensing model; on the basis of constraint conditions of a radar perception model, a problem of minimizing interference power among multiple users is constructed; adding similarity constraint and constant modulus constraint to construct an optimization problem of minimizing interference power among multiple users; then, adding a weighting factor to obtain a compromise optimization problem; and determining a concave-convex penalty algorithm to enable a constant modulus constraint in the non-convex optimization problem to be equivalent to a convex constraint and a non-convex constraint, and converting the non-convex constraint into the convex constraint by using a successive convex approximation method to obtain a globally optimal solution. Compared with a strict radar constraint scheme, the method provided by the invention can provide a higher average reachable rate and a lower bit error rate, and greatly improves the communication performance while ensuring the sensing performance.

Embodiments of the present disclosure relate to a beamforming solution for FDD MIMO communication. A first device receives a reference signal from a second device in a first channel, and determines a covariance matrix associated with the first channel. The first device determines a set of beamforming vectors from the covariance matrix based on the number of dominant angles of arrival associated with the reference signal and the number of beams associated with the set of beamforming vectors, and performs a transmission to the second device based on the set of beamforming vectors in a second channel. In this way, beamforming vectors can be calculated from the transformed channel covariance matrix with the angular spread and imperfect reciprocity considered.

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform pre-equalization for MIMO communications. A receiver device, such as an extended reality (XR) device, may be configured to offload a portion of data processing to a companion device, such as a user equipment (UE). In some aspects, the UE may generate a DFT-S-OFDM waveform and may apply a pre-equalization to the DFT-S-OFDM waveform. Applying the pre-equalization to the DFT-S-OFDM waveform may include applying a minimum mean square error (MMSE) pre-equalization to the DFT-S-OFDM waveform. The receiver device may receive the pre-equalized DFT-S-OFDM waveform from the UE and may process the pre-equalized DFT-S-OFDM waveform. For example, the receiver device may decode the pre-equalized DFT-S-OFDM waveform without performing fast Fourier transform (FFT) or inverse discrete Fourier transform (IDFT) operations.

The invention discloses a frequency spectrum and power distribution method for a hybrid power line / wireless MIMO (Multiple Input Multiple Output) system, which relates to the technical field of hybrid power line / wireless MIMO system communication and comprises the following steps: establishing a channel model for wireless MIMO communication and power line communication based on OFDM (Orthogonal Frequency Division Multiplexing) modulation; the method comprises the following steps: performing precoding and merging processing on wireless MIMO signals by adopting SVD (Singular Value Decomposition), so that each sub-carrier forms a plurality of parallel sub-channels; frequency spectrum allocation and power allocation are carried out through alternate optimization, and greedy frequency spectrum allocation is carried out according to parallel channel gains. According to the frequency spectrum and power distribution method for the hybrid power line / wireless MIMO system, a water injection algorithm is adopted to perform joint power distribution on wireless and PLC subcarriers, so that the power distribution is more flexible, the reliability of data transmission is improved, SVD is adopted to perform channel pre-coding, and a maximum ratio combining method is combined to combine receiving end signals, so that the reliability of data transmission is improved. And the signal quality and the system robustness are enhanced.

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.

The invention relates to the technical field of wireless communication, and discloses a super-large-scale MIMO (Multiple Input Multiple Output) communication perception integrated method, which comprises the following steps of: establishing a super-large-scale MIMO communication perception integrated system model; respectively establishing a communication model and a sensing model; calculating a communication performance index according to the communication model and calculating a perception performance index according to the perception model; the method comprises the following steps: constructing a joint optimization problem taking maximized communication performance indexes and perception performance indexes as objective functions, solving the joint optimization problem, obtaining an optimal beam forming vector, optimizing a transmission signal by using the optimal beam forming vector, obtaining an optimized transmission signal, and realizing a communication task and a perception task by using the optimized transmission signal. According to the invention, efficient cooperative operation of sensing and communication can be realized, the comprehensive performance of the system is improved, and a flexible and adjustable solution is provided for power distribution in different application scenes.

The embodiment of the invention discloses a vehicle control method and device based on laser communication, equipment and a storage medium, belongs to the technical field of vehicle control, is applied between communication nodes including a vehicle-mounted terminal, and is characterized in that a wavelength division multiplexing-based multi-channel MIMO communication module is configured between the communication nodes, and the method comprises the following steps: obtaining driving information of an ith vehicle; determining decision information for the i-th vehicle based on the driving information; and sending related information of the decision information to two vehicles adjacent to the i-th vehicle in the motorcade through the laser array in the i-th vehicle. Communication is achieved through the multi-channel MIMO communication module, the problems of communication interruption and high time delay caused by electromagnetic interference, high-concurrency channel blocking and the like in communication can be effectively solved, the communication stability is improved, the time delay is reduced, stable links and low bit error rate can be kept in a complex traffic environment, and the communication efficiency is improved. Decision information of the vehicle is expressed to the adjacent vehicle in time, and consumption of hardware computing power is effectively reduced.

Example embodiments of the present disclosure relate to on-demand marking for channel classification training. A first device transmits a first signal from the first device to each of a plurality of second devices via a first beam. The first device also updates the first beam at least once by: receiving, from each of the plurality of second devices, a second signal transmitted via a second beam determined based on the first beam; and adjusting the first beam based on a measurement of the received second signal. In this manner, instead of achieving a maximum beamforming gain for a one-to-one network device and terminal device pair, the total beamforming gain between a plurality of network devices and a plurality of terminal devices is optimized.

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to inter-user-equipment (inter-UE) interference cancellation (IC) for physical downlink control channel (PDCCH) multi-user multiple-input multiple-output (MU-MIMO). In some aspects, a user equipment (UE) may be configured with an indication of cell radio network temporary identifiers (C-RNTIs) and / or scrambling code identities of respective candidate UEs that use the same or overlapping control-channel elements (CCEs) as the UE. In some aspects, the UE may perform the inter-UE IC by decoding a PDCCH communication targeted for one or more of the candidate UEs and subtracting the decoded PDCCH communication from at least a part of a PDCCH MU-MIMO communication such that the remaining signal includes data targeted for the UE.

This disclosure provides systems and methods for selectively enabling multi-user (MU) communications. In some implementations, an access point (AP) obtains one or more packets associated with a traffic flow, and obtains at least one of service-level agreement (SLA) parameters associated with the traffic flow, attributes of the traffic flow, or network parameters associated with a basic service set (BSS) that includes the AP. The AP provides an indication of whether the traffic flow is suitable for transmission as a single-user (SU) multiple-input multiple output (MIMO) (SU-MIMO) communication, as a multi-user (MU) MIMO (MU-MIMO) communication, as an orthogonal frequency division multiple access (OFDMA) communication, or as a partial bandwidth (BW) MU-MIMO communication to a WLAN subsystem of the AP, the indication being based on one or more of the SLA parameters, the traffic flow attributes, or the network parameters.

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.

The invention relates to a communication method and device, a storage medium, communication equipment and a chip. The method comprises the following steps: firstly, a terminal is positioned through Bluetooth multiple antennas, and the relative position between the terminal and network equipment is obtained; and then the terminal performs directional MIMO WiFi communication with the network device based on the relative position with the network device. Through application of the technical scheme of the invention, directional signal transmission can be carried out between the terminal and the network equipment, the interference of a multipath effect can be reduced, and the WiFi communication quality can be improved. And compared with the transmission of omnidirectional signals, the method adopts a directional signal transmission mode, so that the signal transmitting power in an MIMO communication scene can be reduced, and the purposes of saving power and optimizing the network experience of a user are achieved.

Methods, systems, and devices for wireless communications are described. The network entity and a set of UEs may be enabled to refine precoders utilized in communications with each UE. For example, a first UE may utilize reference signaling from a network entity to generate precoding matrix information (PMI) and may transmit the PMI to the network entity, which may forward the PMI to a second UE. The network entity may also forward PMI of the second UE to the first UE. The first UE may utilize the PMI of the second UE, as well as feedback associated with the first UE, to refine the PMI of the second UE, and the second UE may do the same for the first UE. The UEs may transmit the modified PMIs to the network entity, and the network entity may communicate with each of the UEs according to the modified PMIs.

The invention discloses an MIMO patch antenna and a decoupling design method thereof, and relates to the technical field of antenna decoupling, and the antenna comprises a main dielectric substrate, a metal ground and a port antenna module. The metal ground is arranged on the lower surface of the main dielectric substrate, the port antenna module is distributed on the upper surface of the substrate, the port antenna module comprises two parallel and symmetrical radiation units, the two radiation units are rectangular patches, the short edges of the two radiation units are parallel, and the distance between the short edges of the two radiation units is smaller than a preset distance threshold value, so that ultra-narrow distance layout is realized to save space. Each rectangular patch is provided with a feed port, a metal probe which penetrates through the patch is arranged in the middle of each rectangular patch, the bottom of each metal probe is located in the main dielectric substrate, and the frequency band can be expanded to cover the N79 frequency band; a square annular gap and a rectangular gap are further formed in the patch, the capacitor is embedded in the rectangular gap, and the short edge of the rectangular gap coincides with the center of the square annular gap; metal short-circuit columns which penetrate through the patch and the substrate and are connected with the metal ground are arranged at the right-angle and square annular gaps of the patch, so that the port isolation can be improved. According to the antenna, the contradiction between the terminal space and the number of antennas can be relieved, the frequency band coverage and the signal stability are guaranteed, and the high-integration MIMO communication requirement is met.

An electronic device according to the present invention, which is provided with a plurality of sub-arrays including a plurality of antenna elements and which performs multiuser MIMO communication with a plurality of other electronic devices, comprises a precoder that performs precoding in which spatial multiplexing between the plurality of other electronic devices is performed independently for each orthogonal polarization, and transmits, to the plurality of other electronic devices, a signal having been subjected to the precoding by the precoder.

The invention discloses a four-in-one full-band directional antenna, which comprises a reflecting plate, a plurality of FPC antenna units are uniformly arranged on the reflecting plate, each FPC antenna unit has the same structure, each FPC antenna unit comprises a support structure, a microstrip feeder is arranged on the support structure close to the area connected with the edge of the reflecting plate, and the microstrip feeder is connected with the FPC antenna unit. And a radiation patch assembly is arranged on one side, back to the reflecting plate, of the supporting structure. The antenna aims at solving the problems that an existing full-band micro base station antenna is uneven in band performance, serious in unit mutual coupling, drifting in beam pointing, low in efficiency and the like, high-performance and high-consistency stable directional radiation in a full band can be achieved, and high-quality 5G MIMO communication is supported.

Various aspects of the present disclosure generally relate to wireless communications. Various aspects relate generally to multiple-input multiple-output (MIMO) communications. Some aspects are more particularly directed to signaling of demodulation reference signal (DMRS) port combinations according to capabilities of the UE associated with layer 8 downlink MIMO communications. In some examples, a UE may transmit a capability communication indicating whether the UE supports layer 8 MIMO communication, and may receive, in association with the capability communication, an indication of a combination of one or more DMRS ports to be used to receive downlink communication.

The application provides a joint structured OFDM modulation and precoding design method of a large-scale MIMO system, and relates to the technical field of MIMO communication.In the application, a point-to-point large-scale MIMO structured OFDM (mMIMO-SOFDM) system is constructed by using a structured OFDM modulation method; and based on a joint spatial precoding and structured frequency domain equalization scheme, a closed-form solution of each subcarrier frequency domain equalizer, transmission precoding and reception precoding of the mMIMO-SOFDM system is solved.By proposing the structured OFDM scheme, the excessive cyclic prefix overhead caused by the double wideband effect of the large-scale MIMO system is reduced.In addition, the proposed joint spatial precoding and structured frequency domain equalization scheme further improves the spectral efficiency of the system and reduces the peak-to-average ratio.

The present invention discloses a ray tracing channel modeling method for very large-scale MIMO communication, comprising: setting a simulation scenario and simulation parameters for very large-scale MIMO communication, calculating the coherence distance of the very large-scale MIMO antenna array, determining the selection interval of antenna units in the MIMO antenna array, and selecting antenna units for simulation; performing ray tracing simulation on the selected antenna units according to the reflection and diffraction propagation mechanism to determine the propagation trajectory of the rays, determining the ray path in combination with the receiving end in the simulation scenario, and screening out non-repeating ray paths from the ray paths; mapping the non-repeating ray paths to unselected antenna units in the MIMO antenna array to determine the ray paths of the unselected antenna units; and obtaining the channel characteristics of all antenna units in the MIMO antenna array to realize the construction of a ray tracing channel model for very large-scale MIMO communication.

To provide a measuring device that makes the parameter setting screen easy to view, allowing users to easily find the parameter they want to set and thus reducing errors in parameter setting. [Solution] The system includes a display unit 15 that displays an image, and a control unit 16 that, when measuring communication in accordance with the IEEE 802.11be standard, switches the setting screen for the Capability Element parameter between a setting screen for SISO communication and a setting screen for MIMO communication and displays them on the display unit 15.

Embodiments of an apparatus, system, and method for a user equipment device (UE) to establish a cellular connection with a base station are provided herein. The UE may receive multiple-input multiple-output (MIMO) uplink configuration information from the base station. The MIMO configuration information may indicate multiple sounding reference signal (SRS) resources. The UE may receive downlink control information (DCI) from the base station, the DCI may specify multiple MIMO parameters. The UE may perform uplink MIMO communication with the base station based on the MIMO configuration and the multiple MIMO parameters.

The invention discloses a multi-antenna communication method and system based on thermal noise modulation, and the method comprises the steps: carrying out the PAM modulation of an input bit stream at a digital processing module of a transmitter, generating a PAM symbol to be transmitted, carrying out the linear transformation, calculating the resistance value of a resistor needed by each transmitting link through a result obtained after the linear transformation, and carrying out the calculation of the value of the resistor needed by each transmitting link; wherein the linear transformation matrix and the bias vector are obtained by solving an optimization problem under limited transmitting power constructed according to a design criterion of a transmitter. In the transmitter analog processing module, the resistance value of the resistor is adjusted according to the calculated value, and thermal noise generated by the resistor is amplified by a low-noise amplifier or is directly transmitted by an antenna. The method is suitable for MIMO communication and MISO communication based on thermal noise modulation, compared with a traditional SISO communication system based on thermal noise modulation, the method can achieve a lower bit error rate on the premise of the same signal-to-noise ratio, and the method is low in calculation complexity and beneficial to engineering implementation.

Various aspects relate generally to wireless communication and more particularly to beamforming techniques in wireless communication networks. Some aspects more specifically relate to beamforming techniques for uplink MU-MIMO communications, and the techniques can include UL MU-MIMO precoding using per-STA feedback. In some examples, an AP can support STA-side precoding for UL MU-MIMO communications by providing STAs with feedback representative of unitary matrices that correspond to block diagonal components of a matrix projection of channel matrices for the STAs in accordance with a linear equalizer. In some examples, the AP can trigger the STAs to transmit sounding packets concurrently, but can use the block diagonal matrix projection to process the various STAs' channels independently.

The invention discloses a channel estimation method and device based on an MU-MIMO communication system, which are used for improving the accuracy of channel estimation in an MU-MIMO communication scene in which a plurality of terminal devices with different time bias communicate at the same time. The method is applied to network side equipment, the network side equipment is connected with multiple pieces of terminal equipment UE, and the multiple pieces of UE multiplex the same time-frequency resource. The method comprises the following steps: performing channel estimation based on a signal received on a time-frequency resource to determine an initial channel matrix, and determining a time offset value of each UE based on the signal; performing time offset correction on the initial filter according to the time offset value of the first UE, and determining a target filter of the first UE; the first UE is any UE in the plurality of UEs; and filtering the initial channel matrix by using a target filter of the first UE to obtain a target channel matrix of the first UE.