271 results about "Spatial multiplexing" patented technology

Resource allocation is provided for an integrated access and backhaul (IAB) network, such as a distributed unit (DU) of an IAB. Methods and systems for allocating resources include allocating a first cell-specific pattern of downlink-flexible-uplink (DL-F-UL) availability for one or more slots, allocating a second cell-specific pattern of DL-F-UL availability for the one or more slots. The IAB DU can signal one or more of the first and second cell-specific patterns to an other IAB DU. At least one of the first cell-specific pattern and the second cell-specific pattern defines a slot format different from a DL-F-UL format. Slot format configuration (e.g., semi-static or dynamic SFI) are provided to support space division multiplexing / spatial multiplexing (SDM).

The invention relates to the technical field of electronic information, in particular to a multi-band cooperative interference gallium nitride phased-array antenna control method and system. The method comprises the steps of extracting key parameters of electromagnetic signals, and generating a cooperative interference strategy combination; mapping the frequency band optimization weight to a dynamic working mode of the gallium nitride power amplifier unit, adjusting the radiation pattern characteristics of the reconfigurable dipole array according to the power distribution parameters, and constructing a composite beam forming framework; phase weighting and spatial multiplexing are carried out on the interference signals of all the frequency bands based on the composite beam forming architecture, and a multi-beam interference cluster is generated; thermodynamic state data of the gallium nitride power amplifier module in the multi-beam interference cluster generation process are collected in real time, and heat dissipation parameters of the liquid cooling system are regulated and controlled according to the thermodynamic state data. Intelligent collaboration and accurate pointing of multi-band interference signals are realized, the interference coverage range and the energy utilization rate are improved, and an efficient interference system integrating electromagnetic sensing, multi-beam collaboration and thermal management is formed.

The invention provides a 5G communication method and system based on environmental adaptation, and the method comprises the steps: fusing electromagnetic field intensity distribution, a terminal density thermodynamic diagram and obstacle reflection data through distributed sensing nodes, and generating a dynamic environment sensing matrix. Based on the matrix, establishing a beam pointing model of the motion trail of the user equipment cluster, dynamically adjusting the radiation direction of a beam main lobe, and creating a null region. And in combination with real-time channel multipath phase characteristics, non-uniform interval subcarrier distribution is reconstructed, and multipath phase compensation is carried out. A main lobe radiation direction and a subcarrier distribution mode are integrated into a physical layer structure, and the spatial multiplexing density of a time-frequency resource block is dynamically adjusted according to a service priority. And iteratively optimizing a collaborative matching threshold value of each parameter through closed-loop interaction of a forward channel response feature and a reverse control instruction. According to the invention, the anti-interference capability and the spectrum efficiency of the communication system are improved.

The utility model discloses fixed wiring terminal automatic assembling equipment which comprises a machine frame, a base body feeding vibration disc and a metal sheet feeding vibration disc, a station adjusting assembly is arranged on the machine frame, and an assembling positioning tool is connected to the station adjusting assembly. A transverse transmission assembly, a longitudinal transmission assembly and a discharging station are arranged on the periphery of the station adjusting assembly. A base moving and taking assembly is arranged on the transverse transmission assembly, and a metal sheet moving and taking assembly and a screw assembling assembly are arranged on the longitudinal transmission assembly. According to the fixed type wiring terminal automatic assembling equipment, full-process closed-loop automatic production including feeding, assembling, rotating, secondary assembling and discharging is achieved, the longitudinal transmission assembly is responsible for metal sheet moving and taking and screw assembling, the longitudinal transmission assembly and the longitudinal transmission assembly share a longitudinal rail, time division multiplexing and efficient connection are achieved, the station adjusting assembly automatically adjusts an assembling positioning tool, and the assembling efficiency is improved. A single set of equipment can complete double-sided assembly, multi-process parallelism and spatial multiplexing of the wiring terminal step by step, and the production takt of the wiring terminal is greatly reduced.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling indicating multiple transmission-reception points (TRPs), and may perform measurements for reference signals received from the multiple TRPs within a set of measurement resources. The UE may transmit a channel state information (CSI) report including a first CSI part and a second CSI part, where at least one of the first CSI part or the second CSI part indicates a first mapping between a first set of TRPs and a first set of spatial multiplexing layers, and a second mapping between a second set of TRPs and a second set of spatial multiplexing layers. The UE may then receive a phase-coherent joint transmission of a downlink message from the first set of TRPs in accordance with the first mapping, or from the second set of TRPs in accordance with the second mapping.

An access point (10) of a wireless communication system configures a carrier for communication with one or more wireless devices (11) associated with the access point (10). Further, the access point (10) contends for access to the carrier and, in response to winning contention for access to the carrier, reserves a transmission opportunity, TXOP, on the carrier. Further, the access point (10) cooperates with one or more other access points (10) of the wireless communication system by sharing the TXOP based on spatial multiplexing of wireless transmissions on the carrier.

Certain aspects of the present disclosure provide techniques for wireless communications. One example method includes receiving, from a backscatter device, a spatial multiplexing capability report; transmitting, to the backscatter device, a reference signal reflection configuration; and transmitting, to the backscatter device, a transmission grant for a backscatter link.

The invention discloses a polarization imaging device and a polarization analysis method based on single-frame polarization collinear holography, and relates to the field of polarization imaging.According to the polarization imaging device, through combination of optical elements such as a half-wave plate, a Wollaston prism and a CCD camera, spatial multiplexing of a detector plane is carried out, and the polarization collinear holography is obtained. And four polarization collinear holograms can be simultaneously acquired by a single frame. According to the polarization analysis method, a Fourier transform auxiliary angular spectrum method is adopted to analyze an intensity distribution diagram of a polarization collinear hologram to estimate initial wavefront distribution, and an iterative finite support constraint selection method is adopted to solve the problem of twin images in the polarization collinear hologram. And further quantizing a complete Jones matrix and a complete Stokes parameter from the finally reconstructed complex amplitude information. The invention solves the problems of high complexity and long processing time caused by independent reconstruction of amplitude, phase and polarization in the traditional polarization holographic technology, and effectively solves the problem that the traditional off-axis polarization holographic imaging system limits the size of an imaging field of view.

A method is disclosed of a transmitter configured to transmit more than one spatially multiplexed streams having a multi-user physical layer packet for a plurality of users. The plurality of users includes a first type user and a second type user. A first stream is assigned for the first type user and a second stream is assigned for the second type user. The method includes leaving a data field of the physical layer packet empty for the first type user, providing second type user emission strength (in a spatial direction towards the first type user) that falls below a threshold value by controlling a spatial emission pattern associated with the second type user for the physical layer packet, and transmitting the physical layer packet.

This disclosure provides methods, components, devices and systems for using a unified framework for coordinated transmission modes, such as a coordinated beamforming (CBF) mode, a coordinated spatial reuse (CSR) transmission mode, and a dedicated transmission opportunity (TXOP) transmission mode. Some aspects more specifically relate to a sharing and shared access point (AP) exchanging communications that facilitate the utilization of a transmission mode. In some implementations, a first AP may transmit, to a second AP, a trigger message that includes an indication of a first station (STA) to be scheduled during a TXOP. The second AP may respond with an indication of whether the second AP can attenuate a transmit signal to the first STA to facilitate the CBF mode. The first STA may proceed with communications via the CBF mode, CSR mode, or dedicated mode in accordance with whether the second AP can attenuate the signal, among other considerations.

Provided are a spatial reuse method and apparatus. The method includes: receiving a radio frame and determining whether the radio frame carries a trigger frame configured to trigger uplink multi-user transmission according to indication information of the trigger frame in a physical signaling field of the radio frame; when the trigger frame is determined to be carried in the radio frame, receiving, by a station, the trigger frame, and acquiring first spatial reuse information of the trigger frame; at an end of a radio frame reception process, determining whether to perform first spatial reuse according to the first spatial reuse information. The present disclosure solves the problem in the related art of low spatial reuse efficiency when a station performs spatial reuse on a radio frame and achieves a technical effect of improving network performance.

An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.

The invention relates to a silicon nitride-based vertical coupling multilayer waveguide structure, which is constructed on a silicon substrate and comprises at least two groups of silicon nitride buried waveguide layers, each group of buried waveguide layers consists of a silicon oxide lower cladding, a silicon nitride waveguide and a silicon oxide upper cladding, and the silicon oxide upper cladding is used as the lower cladding of the next group of buried silicon nitride waveguide; and longitudinal spatial multiplexing is realized.

This disclosure provides methods, components, devices and systems for signal strength-based selection between spatial reuse or multi-primary channel communication modes. Some aspects more specifically relate to how an access point (AP) or station (STA) may select between a spatial reuse communication mode or a multi-primary channel communication mode in accordance with a threshold value and one or more signal strength measurements at the AP or STA. In some examples, the AP may transmit an indication of the threshold value to the STA. In some aspects, the AP or STA may select the spatial reuse communication mode in accordance with the signal strength measurement(s) at the AP or STA satisfying the threshold value. In some other aspects, the AP or STA may select the multi-primary channel communication mode in accordance with the signal strength measurement(s) at the AP or STA failing to satisfy the threshold value.

Techniques for improved spatial reuse for wireless local area network (WLAN) networks are described. An access point (AP) may win a contention to a wireless medium and obtain a transmission opportunity (TXOP). The AP may perform a procedure to identify a group of un-managed APs for participation in spatial reuse opportunities for synchronous transmission over the TXOP. The AP may perform the procedure using over-the-air signaling. The AP may transmit a spatial reuse (SR) poll frame to one or more un-managed APs of the network, either sequentially or as part of a multiple-AP procedure. The AP may receive an SR response frame, or directly measure potential interference of a station (STA) serviced by one or more un-managed APs, and select a group of APs for coordinated reuse over the TXOP. The AP may select the group of APs based on one or more criteria for coordinated reuse.

The invention belongs to the technical field of micro-nano optics. The invention provides a multi-focus off-axis super lens of a visible light wave band. The multi-focus off-axis super lens comprises a plurality of groups of off-axis single-focus sub super lens assemblies which are circularly arranged, wherein each group of off-axis single-focus sub super lens assemblies comprises a plurality of off-axis single-focus sub super lenses which are concentrically and annularly distributed; wherein the off-axis single-focus sub-super-lens comprises a micro-structure unit and a substrate unit, the micro-structure unit comprises a plurality of micro-structure columns which are uniformly arranged, and one end of each micro-structure column is arranged on the substrate unit. According to the embodiment of the invention, on the basis of a geometric phase modulation principle, through reasonable phase design and microstructure arrangement, the off-axis single-focus sub-super-lens has a designed focus position; through spatial multiplexing of the micro-structures of the multiple off-axis single-focus sub-super-lenses, one super-lens has the phase characteristics of the multiple off-axis single-focus sub-super-lenses, and the functions of the multiple off-axis single-focus sub-super-lenses are achieved on one super-lens.

An access point (AP) transmits a first physical layer protocol data unit (PPDU) comprising an indication to a first station (STA) to measure a receive power of a second PPDU transmitted by a second STA. The AP transmits to the first STA a third PPDU comprising an indication of a parameterized spatial reuse (PSR) parameter for use by the first STA to determine a transmit power for a fourth PPDU.

The invention relates to a two-dimensional spatial multiplexing multi-path synthesis power amplifier circuit, which comprises an input power division network for distributing signals to each path of two-dimensional spatial multiplexing module for signal amplification; the two-dimensional space multiplexing module is used for placing the adjacent multi-path amplifying units or transmitting units in the same area, so that m * N paths of amplifying units or transmitting units are realized in N paths of areas, power synthesis miniaturization is realized, and signals are sent to an output synthesis network; and the output synthesis network is connected with the outputs of the two-dimensional spatial multiplexing modules, and outputs the output signals after power synthesis. Compared with a conventional power synthesis technical scheme, the area is more compact, the output power can be doubled under the same area, or the area is saved by 50% under the same output power, the on-chip power synthesis implementation cost can be greatly reduced, the design is simpler and more convenient through mutual decoupling of parameters of the embedded transformer and the peripheral transformer, and the power synthesis efficiency is improved. The design efficiency is improved.

This disclosure provides methods, components, devices and systems that may help various wireless devices perform coordinated spatial reuse in a wireless network. An example method, performed at a first wireless node, generally includes transmitting a first frame indicating a capability of the first wireless node to share a transmission opportunity (TXOP) with one or more candidate nodes. The method also includes transmitting a second frame (i) indicating that a first TXOP associated with the first wireless node is available to be shared with a group of the one or more candidate nodes and (ii) including one or more parameters that indicate one or more constraints on communication during the first TXOP. The method further includes participating in a coordinated transmission with the group of the one or more candidate nodes during the first TXOP using at least one of the one or more parameters.

This invention discloses a method and system for monitoring abnormal data in power grid dispatching. The method includes: embedding multidimensional perturbation codes containing first-type (time-domain delay) and second-type (frequency-domain oscillation) features into dispatching commands; target devices generating physical ripples with specific time-domain fingerprint features in response to dispatching commands, and dynamically selecting a set of responding devices based on node impedance matrices and sensitivity coefficients; target devices and the set of responding devices collaboratively triggering responses with specific frequency-domain fingerprint features, and achieving spatial multiplexing verification through a time synchronization protocol; extracting time / frequency-domain fingerprint features from feedback data, and performing spatiotemporal consistency verification using a dynamic transfer function model and multivariate mutual information entropy. Furthermore, by periodically injecting false interference data, the survival verification of the monitoring system status is achieved. This invention can effectively monitor system failures and identify covert data injection attacks, significantly improving the security defense capabilities of power grid dispatching.

The utility model provides a kind of ship exhaust gas denitration desulfurization sound attenuation white integration device, the device includes the smoke inlet, SCR reactor, primary expansion cavity, secondary expansion cavity, steam heat exchanger and smoke outlet that are sequentially communicated, first spray layer is arranged in the primary expansion cavity, second spray layer is arranged in the secondary expansion cavity, to realize the efficient cooperation and space multiplexing of each function section. Through modularization nesting design and structure function multiplexing, the problems of large space occupation, low efficiency, high energy consumption and inconvenient maintenance existing in the prior art are solved, and through structure design, desulfurization and noise reduction functions are simultaneously realized.

The invention discloses a transmission access method of a directional ad hoc network, relates to the field of wireless ad hoc networks, and is used for improving the total network throughput of the directional ad hoc network. The method comprises the following steps: planning multi-time-slot network operation parameters including time slot parameters, frequency parameters and spatial multiplexing parameters; s2, respectively loading the network operation parameters to each communication node; s3, starting each communication node to construct a time-synchronized self-organizing network, and regularly exchanging spatial position information among the communication nodes; and S4, under the management of a unified time slot timer, each communication node performs transmission access in time slots one by one according to the loaded network operation parameters. According to the invention, the network transmission efficiency of the directional ad hoc network can be improved, and the transmission delay is reduced.

This invention relates to a method for fabricating a low insertion loss spatial multiplexer / demultiplexer for multi-core optical fibers, belonging to the field of multi-core optical fiber communication technology. By using single-core fibers of different core diameters at the splice points, this invention effectively improves the fault tolerance of the multiplexer's core arrangement while reducing optical signal leakage at the splice points, thereby reducing insertion loss. This allows for the multiplexing of signals from single-core fibers into multi-core fibers at the input end and the demultiplexing of signals from multi-core fibers into single-core fibers at the output end. The spatial multiplexing / demultiplexer device prepared using this method exhibits lower insertion loss compared to the traditional bundled method, and is simpler and less expensive to operate than polymer waveguide and fused taper methods. The prepared spatial multiplexer / demultiplexer is small, flexible, durable, and suitable for mass production.

The application discloses a kind of space multiplexing time slot allocation method and system based on underwater acoustic channel conflict matrix, first according to underwater acoustic transmission link model, the link signal receiving success probability in underwater acoustic network is calculated;Second, according to underwater network topology information and link signal receiving success probability, generate channel conflict matrix;Then, construct time slot allocation matrix is used to mark node occupies time slot situation, from time slot conflict situation, time slot occupancy and allocation uniformity angle, to time slot allocation construct multi-objective optimization function;Finally, according to underwater acoustic channel conflict matrix and time slot allocation matrix, through global search, find the optimal solution of time slot allocation.The application comprehensively considers the allocation of underwater channel resources from three aspects of time slot conflict, time slot utilization and time slot allocation uniformity, establishes an effective fitness evaluation mechanism, can make full use of channel resources, and improves underwater acoustic communication performance.

A first STA of a BSS detects an OBSS TXOP on its primary channel. The OBSS transmission meets the criteria for Spatial Reuse operations. The first STA transmits a NPCA switching frame to other STAs of the BSS, on its primary channel using the spatial reuse operation and a reduced transmit power. The frame indicates OBSS interference to those other STAs that are too far to detect it. The NPCA switching frame triggers a switching of channel access from PCA to NPCA at these other STAs. Next, the STAs perform NPCA operations on a NPCA primary channel, even if some of them have not directly detected the OBSS interference. An AP receiving the NPCA switching frame may, in response, transmit a similar switching frame to propagate the OBSS interference information and the switching trigger to yet other STAs too far from the first STA to receive the NPCA switching frame.

The present invention provides a data management method for a storage medium of a neural network accelerator, wherein the storage medium includes a main memory, and the method includes: obtaining structural information and instruction information of a neural network-based model to be accelerated; based on the structural information and instruction parameters, dividing a dedicated storage area in the storage medium to store instructions and data corresponding to the model; wherein the dedicated storage area includes: an instruction area for storing instructions required for the accelerator to accelerate operations on the model; a data stacking area for storing intermediate result data output by a corresponding layer to be used in other layers in the interval, and performing spatial multiplexing within the area; and a data temporary storage area for storing intermediate result data output by a corresponding layer to be used only in the layer below the layer, and performing spatial multiplexing within the area.

This optical amplifier comprises: a rare-earth-doped optical fiber; an excitation light coupler that inputs signal light and excitation light to the rare-earth-doped optical fiber; a multimode excitation light source that outputs the excitation light to a multimode fiber; and a spatial multiplexing optical fiber that is connected to the multimode fiber, that introduces the excitation light into the excitation light coupler, and that has two or more spatial channels.

The invention relates to a three-dimensional optical control method based on a metasurface, and the method comprises the steps: scanning a nano-column unit structure to construct a phase library, selecting high-efficiency half-wave plate nano-columns with phase coverage from-pi to pi from the phase library for the construction of the metasurface, cooperatively introducing a geometric phase and transmission phase regulation and control mechanism, and combining spatial multiplexing arrangement to construct a metasurface. Independent regulation and control of different circular polarization light fields under different wavelengths are realized, so that four switchable optical control focuses are generated in a three-dimensional space; by switching the polarization state or the working wavelength of the incident light, stable capture and controllable transfer of the particles are realized in the space. Compared with the prior art, the method has the advantages that three-dimensional optical control over particles is achieved in an on-chip structure, the control freedom degree is high, and the control adjusting mode is simple and efficient.