49 results about "Mimo communication" patented technology

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.

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.

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.

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.

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.

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.

For example, an 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 of a plurality of wireless devices, where each wireless device of the plurality of wireless devices is associated with MU-MIMO communication, and wherein 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 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 sending to at least one other wireless device or storing locally at the first wireless device.

A communication device, a control method of a communication device, and a computer program product are provided. A control method of a communication device is provided. The control method includes receiving a wireless frame conforming to an IEEE 802.11 standard series, and decoding the received wireless frame, wherein the wireless frame is for multi-user multiple-input multiple-output (MU-MIMO) communication, wherein a preamble of the wireless frame contains a universal signal field (U-SIG) as a first signal field and a second signal field, wherein the second signal field contains information specifying a number of streams of each communication device participating in the MU-MIMO communication, and information specifying a modulation and coding scheme (MCS) to be used for each stream corresponding to the number of streams, and wherein storing the specific information as the information specifying the MCS indicates that different MCSs are to be used for each of a first stream and a second stream directed to a specific communication device.

The invention relates to the technical field of photovoltaic power station unmanned aerial vehicle inspection, in particular to a photovoltaic power station inspection data acquisition method based on multi-unmanned aerial vehicle collaboration, which comprises the following steps of: firstly, establishing a collaborative inspection data acquisition system comprising unmanned aerial vehicles, a base station, a ground user and a control center, and acquiring original data such as geographic information and sensor parameters of a photovoltaic power station; constructing a multi-unmanned aerial vehicle track and power joint optimization model, an energy consumption model, a data acquisition and transmission model, an information freshness model, an MIMO communication interference control model and a reinforcement learning framework based on a TD3 algorithm, and converting the models into state input, action constraint and reward weight of the framework by taking the joint optimization model as a target; and finally, the control center controls the unmanned aerial vehicle to execute the process of initialization-sensing-communication-feedback-strategy updating, and the process is repeated until the inspection task is completed. According to the invention, autonomous collaborative optimization of multiple unmanned aerial vehicles is realized, inspection efficiency is improved, data freshness is guaranteed, communication interference is reduced, and the method is suitable for intelligent operation and maintenance of a photovoltaic power station.

A technology is described for a dual path repeater configurable for a split mode and a multiple input multiple output (MIMO) mode. The dual path repeater can comprise first and second server ports and first and second donor ports. Four amplification and filtering paths are communicatively coupled between the ports. Each amplification and filtering path include a software defined filter (SDF). The SDFs are configured to filter the same 3GPP bands to provide MIMO communication or the first SDF and the second SDF are configured to filter different bands to enable the dual path switchable repeater to provide split mode communication on multiple TDD / FDD bands.

This disclosure relates to a wireless communication system, a wireless communication method, a control station, and a control program, and aims to improve channel capacity without increasing the number of transmitting and receiving antennas. [Solution] The wireless communication system of this disclosure comprises a control station, a radio station equipped with multiple antennas, and a base station that performs MIMO communication with the radio station. The radio station has a function to vary the relative position of the multiple antennas with respect to the base station according to control information. The control station is configured to perform a process of predicting the relationship between the channel capacity formed between the radio station and the base station and the control information, a process of calculating at least one piece of control information that can improve the channel capacity based on the predicted relationship, and a process of notifying the radio station of the calculated control information. The radio station is configured to perform a process of changing its relative position based on the notified control information.

A base station beamforming method for reducing cross link interference (CLI) on an uplink (UL) band of a first base station (110) caused by a second base station (120) realized by a system comprising the first base station (110), and the second base station (120) having line of sight with the first base station (110) capable of communicate in sub-band full duplex (SBFD) mode and capable of multiple input multiple output (MIMO) communication; and at least a first user equipment (210) and at least a second user equipment (220) capable of communicate in SBFD mode and capable of MIMO communication.

The invention discloses a non-cellular large-scale MIMO (multiple input multiple output) communication integrated system precoding method and device based on multiple reflection points, and belongs to the technical field of wireless communication, and the method comprises the following steps: based on a pre-constructed non-cellular large-scale MIMO communication integrated system model, pre-coding the non-cellular large-scale MIMO communication integrated system model; calculating the rate sum of the communication user, the transmitting power of the access point and the sensing signal-to-noise ratio from the access point to the sensing target direction; the transmission power of the access point and the sensing signal-to-noise ratio from the access point to the sensing target direction are used as constraints, and the rate sum of communication users is maximized by optimizing a precoding matrix of the access point; wherein the cellular-free large-scale MIMO sensing integrated system model comprises a downlink communication channel model and a radar sensing target model. According to the invention, the rate sum of the communication user can be maximized by optimizing the sending precoding matrix of the access point, so that the environment perception capability is effectively improved, and the purpose of improving the communication performance and the perception performance at the same time is achieved.

To provide a measuring device that can suppress parameter setting errors by limiting the configurable range of parameters according to the functions that can be performed. [Solution] The system includes measuring instruments 51A and 51B, which have the same appearance but different functionalities, and which measure SISO communication. It also includes an integrated control device 55 that controls the measuring instruments 51A and 51B and measures the wireless signals transmitted and received by the DUT1, which performs MIMO communication. The integrated control device 55 collects the functionalities of each of the measuring instruments 51A and 51B and limits the setting range of the MIMO communication parameters based on the functionalities of the measuring instruments 51A and 51B.

Embodiments of the present disclosure relate to the technical field of communications, and provide a communication method and apparatus, a device, and a storage medium, which can be applied to an access point (AP) device. The method comprises: determining a first message frame, wherein the first message frame comprises a first capability information element, the first capability information element comprises first identification information, and the first identification information indicates that the AP device supports non-orthogonal frequency division multiple access (non-OFDMA) uplink (UL) multi-user multiple-input multiple-output (MU-MIMO) communication on 640 MHz bandwidth; and sending the first message frame. The embodiments of the present disclosure can provide a communication mode that indicates a bandwidth supported in non-OFDMA UL MU-MIMO communication.

A repeater is disclosed. The disclosed repeater according to one embodiment is a repeater for relaying multi input multi output (MIMO) communication in a forward link between a base station and terminals in a building, and comprises: a first antenna; a second antenna; a first internal signal path which is connected to the first antenna, and which includes a forward signal path for processing a first forward signal received by the first antenna and a reverse signal path for processing reverse signals oriented from the terminals toward the base station; and a second internal signal path which is connected to the second antenna, and which processes a second forward signal received by the second antenna.

The invention discloses a multi-FPGA collaborative high-performance digital signal processing system and a health monitoring method thereof, and belongs to the technical field of digital signal processing. The system comprises a plurality of FPGA processing boards (1) and a chassis (3) which are interconnected through a VPX backboard (2). Each FPGA processing board (1) is integrated with an FPGA chip (11) responsible for core processing and an onboard MCU (12) responsible for system health management. The VPX backboard (2) not only provides inter-board high-speed interconnection (GTY / LVDS), but also provides a synchronous clock for all processing boards through the high-precision crystal oscillator (21) and the clock fan-out chip (22). And the case (3) is integrated with a power supply and a cooling fan. According to the invention, the onboard MCU (12) monitors the voltage and temperature of each processing board in real time, executes accurate power-on time sequence management and abnormal power-off protection, and reports state information through the FPGA chip (11). The problems of low reliability, difficulty in clock synchronization, extensive heat dissipation management and the like of a multi-FPGA system are solved, the stability, availability and maintainability of the system are remarkably improved, and the system is particularly suitable for the high-performance signal processing fields of large-scale MIMO communication, radar and the like.

The application discloses a precoding method and device of a cell-free massive MIMO integrated system, wherein an access point provides data services to a communication user through a downlink of the cell-free massive MIMO integrated system, and meanwhile, tracks a point-like sensing target from a reflection echo of the communication user. The method comprises the following steps: calculating a downlink reachable rate of the communication user and a signal-to-noise ratio of the reflection echo, constructing a problem function by taking the downlink reachable rate of the communication user as a maximum target and taking the signal-to-noise ratio of the reflection echo as a constraint, and solving the constructed problem function to obtain a precoding scheme of the system. The application can greatly improve the communication performance of the system and show the trade-off relationship between the communication performance and the sensing performance under the premise of not introducing additional system energy consumption and guaranteeing the sensing performance, so as to enhance the utilization efficiency of wireless spectrum resources and expand and improve the overall performance of the system.

The invention relates to a method (1, 2) of communicating between a transmitter and a receiver of a SU-MIMO system, the system comprising a number of transmit antennas, at least one transmit antenna port and a number of receive antennas, the method comprising:-transmitting (11) to the receiver control information comprising: for a given antenna port (), on a per time-frequency resource element, at least one time-frequency resource element; a power ratio () between reference symbols and data transmitted to user equipment.

An AP obtains service-level agreement (SLA) parameters indicating at least a delay bound for each of a plurality of traffic flows. The AP receives first packets of a first traffic flow, and delays their transmission for a delay period based on the data carried in the first packets being less than a first threshold. During the delay period, the AP receives second packets of the first traffic flow while also receiving packets of a second traffic flow, groups the second traffic flow with the first traffic flow for an MU-MIMO transmission based on the data carried in the first and second packets of the first traffic flow being greater than the first threshold and the data carried in the packets of the second traffic flow being greater than a second threshold, and transmits the first and second packets traffic flows as an MU-MIMO communication.

The application discloses a satellite large-scale MIMO communication positioning integrated transmission method, which is characterized in that a large-scale MIMO antenna array is equipped at a satellite end, and multiple users are simultaneously served; communication and positioning use the same spectrum resource and the same hardware platform, communication positioning integration is implemented by transmitting pilot and data signals; rough position information of the satellite and the user is obtained at the satellite end in the form of initial access or tracking, and the pre-coded pilot and data signals are transmitted to each user based on the rough position information; the user end estimates channel parameters from the received pilot signals, and obtains more accurate position information, which is fed back to the satellite end. The application fully utilizes spectrum resources, simultaneously realizes wireless communication and positioning functions based on a low-orbit satellite, greatly improves communication performance and positioning accuracy, and realizes global communication coverage and seamless positioning.

The invention belongs to the technical field of underwater acoustic transmission, and particularly discloses an MIMO communication cooperative detection method based on hybrid electromagnetic induction and acoustics, and the method comprises the steps: carrying out the signal exchange between a master node and a slave node in a transmitting cluster through a magnetic induction technology, so as to achieve the time-frequency synchronization; generating an MIMO signal adaptive to the underwater mixed cooperation scene based on the synchronized point cooperation relationship between the nodes in the transmitting cluster; transmitting the MIMO signal from the transmitting cluster to the receiving cluster in a k-mu shadow fading channel environment through an acoustic transmission medium, wherein the k-mu shadow fading channel environment is an underwater channel model used for representing a composite line-of-sight effect and a cluster scattering effect; and carrying out signal exchange among nodes in the receiving cluster through a magnetic induction technology to realize time-frequency synchronization, and carrying out signal detection and combination on signals received by the receiving cluster to recover original signals. According to the invention, the reliability and throughput of underwater complex environment communication can be effectively improved.

The application discloses a kind of hybrid beamforming method and device for ITS assisted satellite communication, belong to high frequency wireless broadband beamforming technical field, the method includes: according to the angle information in the system configuration information and channel state information of ITS assisted satellite communication system, obtain the ITS phase shift matrix based on center subcarrier;Utilize the virtual ITS phase shift matrix and the illumination matrix corresponding to the mth subcarrier to construct the virtual equivalent channel matrix of the mth subcarrier, and then solve its virtual digital precoding matrix;Utilize the ITS phase shift matrix corresponding to center subcarrier, the virtual ITS phase shift matrix and the virtual digital precoding matrix of the illumination matrix corresponding to the mth subcarrier determine the target digital precoding of the mth subcarrier, and then obtain the hybrid beamforming matrix of each subcarrier, to carry out hybrid beamforming.Therein, using virtual digital precoding inverse, effectively suppresses the serious beam squint problem of phased array in high frequency broadband large-scale MIMO communication.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a first indication of a multiple-input-multiple-output (MIMO) configuration threshold that is associated with a selection between a polarization MIMO configuration and a spatial MIMO configuration, the MIMO configuration threshold being based at least in part on a performance threshold. The UE may receive a second indication of a MIMO communication configuration that specifies the selection. Numerous other aspects are described.

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.

A method for designing a time-domain non-stationary V2V MIMO communication channel emulator includes determining basic parameters for the V2V MIMO communication channel; generating a V2V 2D time-domain non-stationary communication channel environment, by using a MATLAB, that is, the numbers of the scatterers and the positions of the scatterers and the like; importing parameters generated in the previous step into a hardware simulation platform to calculate communication channel parameters for clusters, such as an angle distribution and a power distribution, writing a Verilog code for running, and eventually calculating to obtain a channel impulse response of the time-domain non-stationary V2V MIMO communication channel; and comparing with a statistical characteristic of a theoretical communication channel model, and designing an appropriate hardware diagram of a communication channel emulator. The method supports the simulation of time-domain non-stationary V2V MIMO communication channel, filling the gap in the field of communication channel emulators.

The application belongs to the technical field of surface wave antennas, and relates to a low-profile antenna wall for multi-scene MIMO communication, which is formed by a plurality of impedance unit arrays, each impedance unit comprising an impedance adjusting layer, a dielectric layer and a grounding layer from top to bottom; the impedance adjusting layer array forms an impedance adjusting plate, the dielectric layer array forms a dielectric substrate, and the grounding layer array forms an antenna grounding plate; the impedance adjusting layer has a capacitive resistance, and the impedance of the corresponding unit is adjusted by adjusting the gap; an external port is prefabricated on the lower surface of the antenna grounding plate. A design method thereof is also disclosed, a specific beam control antenna can be designed according to the corresponding scene, the corresponding statistical optimal directivity diagram is obtained, the corresponding surface wave antenna is designed by using artificial impedance, the required optimal directivity diagram distribution is realized through the surface wave antenna, and then the optimal degree of freedom and channel capacity of the entire antenna array surface are obtained, so that optimal MIMO communication can be realized.