35 results about "Spatial multiplexing" patented technology

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.

This disclosure provides systems, methods and apparatuses for selectively using spatial reuse (SR) transmissions in the presence of an overlapping basic service set (OBSS) transmission. In some implementations, a wireless communication device may transmit data to another wireless communication device using SR packets in the presence of an OBSS transmission or interference only when the signal strength of SR packets received at the other wireless communication device is greater than an amount of signal degradation of the OBSS transmission caused by the SR transmission.

A communication device respectively establishes a plurality of wireless communication connections with a plurality of predetermined devices in an infrastructure network, and includes a wireless transceiver and a processor. The wireless transceiver transmits or receives wireless signals. The processor selects a spatial reuse mechanism, generates spatial reuse information according to the spatial reuse mechanism, and transmits at least one packet carrying the spatial reuse information to the predetermined devices. The spatial reuse information defines a pattern of a communication period. The communication period comprises a spatial reuse phase and a non-spatial reuse phase. The spatial reuse information comprises time information of at least one of the spatial reuse phase and the non-spatial reuse phase. In response to a selection of the spatial reuse mechanism, the processor suspends a wireless signal transmission with the predetermined devices during the spatial reuse phase.

The purpose of the present invention is to provide an optical fiber testing device and a method therefor that enable stable measurement of crosstalk in an MCF and an MMF without being affected by noise.　An optical fiber testing device according to the present invention measures crosstalk of a space-division multiplexed optical fiber 50, and comprises: a light transmission unit 10 that causes modulated test light to enter one path of the space-division multiplexed optical fiber 50 from one end of the space-division multiplexed optical fiber 50; a light receiver 22 that receives transmitted light output from each path at the other end of the space-division multiplexed optical fiber 50 and outputs the transmitted light as a light reception signal; a signal processing unit 24 that demodulates each light reception signal and detects the light intensity of the respective transmitted light; and a calculation unit 30 that calculates crosstalk from the light intensity of the transmitted light.

Provided are a communication method and a communication device. The method comprises: a first access point sends a first frame to one or more second access points, the first frame being used for indicating one or more of the following pieces of information: a transmission mode used during coordinated spatial reuse; a power negotiation mode used during the coordinated spatial reuse; the time when the second access point completes measurement, the measurement being used for determining transmission power used by the second access point during the coordinated spatial reuse or the maximum transmission power allowed to be used; and the order in which the one or more second access points trigger the measurement.

Various aspects of this disclosure relate generally to wireless communication. In some aspects, the reflecting device can generate a multi-peaked reflection beam that spatially multiplexes a first reflected signal of a first signal and a second reflected signal of a second signal. The reflecting device can receive the first signal and the second signal. The reflecting device can use the multi-peaked reflection beam to reflect the first signal and the second signal to output a spatially multiplexed reflected signal. Numerous other aspects are described.

This invention discloses a resource optimization method, system, and storage medium for a STAR-RIS-assisted UAV communication system. The method includes establishing a STAR-RIS-assisted UAV communication system model; constructing an objective optimization problem, aiming to maximize the system's total transmission rate under constraints such as UAV transmit power, spatial multiplexing, user scheduling binary constraints, STAR-RIS energy conservation constraints, and phase shift orthogonality constraints, and optimizing user scheduling, active beamforming, and STAR-RIS transmission and reflection coefficients; employing an alternating optimization framework to decompose the objective optimization problem into user scheduling sub-problems and active beamforming and STAR-RIS configuration sub-problems; using a penalized successive convex approximation method to solve the user scheduling sub-problem; and using a penalized dual decomposition method combined with block coordinate descent to solve the active beamforming and STAR-RIS configuration sub-problems. The method of this invention can significantly improve the overall system transmission rate while suppressing multi-user interference, meeting the high-bandwidth service requirements of surveillance video and other applications.

A technology for an access point (AP) comprising a processing device and a transceiver is disclosed. The processing device can receive information about an interference path between the STA and the AP from a station; select a transmit power at the AP based on the information about the interference path between the STA and the AP; and determine a transmission mode at the AP based on the transmit power, wherein the transmission mode includes spatial reuse transmission, spatial zeroing, or both. The transceiver can then transmit a transmission from the AP to the STA based on the transmission mode.

The invention relates to the technical field of mobile communication, and discloses a 4T4R railway 5G vehicle-mounted repeater system based on an MIMO technology and a control method thereof, and the system comprises a roof 4T4R donor array antenna, a distributed carriage coverage 4T4R antenna, a near-end host unit, a cascade expansion unit, a far-end slave unit and a Beidou and inertial navigation positioning module. The units form a digital transmission link through optical fibers; according to the control method, a line electronic map and a scene-mode mapping table are loaded, train position information and adjacent cell measurement parameters are obtained, switching among spatial multiplexing, transmit diversity and beam forming is carried out under the scenes of stability, high quality, shielding, multipath, deep fading, multi-bend hills and the like, 4T4R and 2T2R self-adaption is achieved under the transmit diversity, and the method has the advantages of being simple in structure, low in cost and high in reliability. And when entering a strong interference area, forming null suppression interference based on synchronous signal block decoding and spatial domain and frequency domain filtering, and triggering soft / hard switching according to a measurement condition to improve continuous coverage and stability.

This invention discloses a compact laser amplification system based on a spatial multiplexing structure. The system includes: a seed laser for providing seed signal light; a beam expander for expanding the signal light; a beam shaping device for controlling the size, spot shape, and intensity distribution of the signal light; a power amplifier system for amplifying the signal light; and a beam transmission encoding device for changing the transmission direction or polarization state of the signal light to encode and derive the number of amplifications, which, in conjunction with the power amplifier system, enables the signal light to be amplified and transmitted back and forth in the gain medium. This compact laser amplification system based on a spatial multiplexing structure achieves efficient extraction of pump energy within a small space through spatial multiplexing of the gain medium, providing a reliable technical path for miniaturized lasers.

Various aspects of this disclosure relate generally to wireless communications. In some aspects, a user equipment (UE) can determine a value for a PTRS power boost of a phase tracking reference signal (PTRS) port, wherein the PTRS port is associated with a sounding reference signal (SRS) resource set, and wherein the value of the PTRS power boost is relative to each layer of the physical uplink shared channel (PUSCH) per resource element (RE). The UE can transmit the PTRS associated with the PTRS port, and wherein the transmission power of the PTRS is based at least in part on the value of the PTRS power boost. Numerous other aspects are described.

This application provides a communication method and apparatus to reduce resource waste, relating to the field of wireless communication technology. In this method, a first non-AP STA sends a first TWT element to an AP. The first TWT element carries parameters for requesting the establishment of a TWT agreement between the first non-AP STA and a second non-AP STA. The first TWT element also includes first indication information, which is used to instruct the second non-AP STA. Based on this scheme, the first non-AP STA can inform the AP of the information of the second non-AP STA, and the AP can determine the information of both parties in the P2P communication. Therefore, when performing resource scheduling, the AP can use the information of the first and second non-AP STAs, and can utilize the directional communication characteristics of millimeter-wave links to perform spatial multiplexing to allocate channel resources more efficiently.

This invention provides an automatic exposure sampling control method for an image sensor, an image sensor, and a storage medium, comprising: responding to incident light, driving a pixel array to be divided into exposure rows with different exposure durations according to a preset period to generate an image charge signal; within the readout period of the same row signal, quantizing the charge signal using at least two analog gain parameters based on column position information to obtain an energy sample set formed by row-column cross-distribution; converting the comparison result of the sample set and the target brightness into driving parameters to drive the register to update global parameters during the vertical blanking period. This invention eliminates the linear dependence of automatic exposure convergence on multi-frame temporal iteration by implementing spatial multiplexing sampling in the pixel row and column dimensions. While effectively avoiding inter-frame decoherence and motion artifacts, it significantly shortens the latency overhead of the first frame image output and reduces the bandwidth load of the underlying readout link.

Proposed are a method and a device for configuring a spatial reuse field in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB PPDU to the transmission STA through a pre-configured frequency band. The trigger frame comprises a common information field and a special user information field. The common information field comprises first to fourth spatial reuse fields. The special user information field comprises fifth and sixth spatial reuse fields. When the pre-configured frequency band is a 20 MHz band, the first to fourth spatial reuse fields are configured by the value of the fifth spatial reuse field.

This disclosure describes systems, methods, and devices related to multi-access point coordinated beamforming and coordinated spatial reuse. A device may generate an invitation frame including information associated with synchronized transmissions between the device and a shared access point (AP); send the invitation frame to the shared AP, the invitation frame inviting the shared AP to synchronize transmissions with the device using coordinated beamforming or coordinated spatial reuse based on the information; identify a response frame received from the shared AP and indicating that the shared AP has accepted the invitation to coordinate transmissions with the device based on the information; send a trigger frame, based on the response frame, associated with synchronizing downlink transmissions with the shared AP based on the information; and send, based on the information, a first downlink physical layer protocol data unit (PPDU) in synchronization with a second downlink PPDU of the shared AP.

This invention relates to a design method for a spatially multiplexed off-axis bifocal multi-order diffractive lens based on blue noise optimization. The method involves determining the off-axis angle and off-axis focal length to generate an ideal off-axis hyperbolic phase distribution φ. L and φ R Calculate the local density of the initial random mask, iteratively optimize and generate a blue noise mask, and then apply φ... L and φ R Mapping to a blue noise mask yields an off-axis bifocal multiplexed phase. A phase library of multi-order diffraction structures is constructed. Phase discrete encoding is performed based on minimizing the phase residual, mapping the discrete phase to a height distribution of the multi-order diffraction structure, thus completing the lens construction. This invention optimizes traditional spatial multiplexing masks based on blue noise, weakening local clustering features in the mask distribution, thereby reducing the mask's spectral characteristics and achieving low background noise and high energy consistency for ideal bifocal phases. Multi-order diffraction structures are used for phase encoding to realize the generation of bifocal phase devices.

Systems and methods are provided for establishing single-layer connections between user equipment (UEs) and a telecommunications network based on the UEs'device types. UEs are classified as either stationary devices or mobile devices based on device information, such as subscriber identity module (SIM) profiles. When a multi-layer connection should not be maintained with a UE, if the UE is classified as a stationary device, the telecommunications network establishes a spatial multiplexing single layer (SMSL) connection with the UE. If the UE is classified as a mobile device, the telecommunications network establishes a single input, single output (SISO) connection with the UE.

This disclosure relates to a terminal capability reporting method and system, storage medium, and electronic device, belonging to the field of communication technology. The method includes: the terminal reporting to a base station that the maximum supported spatial multiplexing layer number for downlink reception is 5 or 6 layers. This method enables the base station to configure signal configurations corresponding to the terminal's transmission capability based on the reported support information of 5 or 6 layers for downlink reception, and to schedule transmission on the physical downlink shared channel. This solves the problem in existing solutions where downlink data transmission in Rank 6 scenarios is impossible because the application scenarios, applicable network configurations, and receiver implementation methods for Rank 6 are not limited, thus achieving the goal of downlink data transmission in Rank 6 scenarios.

The application is suitable for the field of communication technology, and provides a data message sending method, device and communication equipment, which comprises the following steps: determining the signal strength of a first terminal to a first AP, wherein the first AP and the first terminal belong to a first BSS network; selecting a corresponding interference reduction strategy according to the signal strength of the first terminal to the first AP, wherein, compared with before the first AP responds to the interference reduction strategy, after the first AP responds to the interference reduction strategy, the interference of the first AP to the wireless signal of a second terminal is lower when the first AP sends a data message, the BSS network to which the second terminal belongs is a second BSS network, and the second BSS network and the first BSS network belong to the same Mesh network; and sending a data message to the first terminal through a spatial multiplexing technology according to the selected interference reduction strategy. Through the above method, the packet loss rate of the second terminal can be reduced.

This invention relates to the field of microscopic optical imaging technology, specifically to a multi-dimensional encoded long focal depth optical field two-photon microscopic imaging method and system. The method and system include: designing a multi-dimensional encoded optical field, configured to flexibly adjust the intensity and position distribution of the optical field based on multifocal spatial multiplexing; inserting an optical field distribution shaping module into a traditional two-photon imaging system to change the phase position relative to the objective lens's back aperture; performing two two-dimensional scans of the sample based on the multi-dimensional encoded optical field scanning imaging to obtain two two-dimensional projection images, which are then determined by combining the lateral spacing distribution of the projection points and the fluorescence intensity ratio. This invention can simultaneously encode the sample distribution into the multi-dimensional information of intensity and position distribution in the projection images during the scanning imaging process, achieving efficient and rapid three-dimensional imaging by analyzing and locating the sample's three-dimensional distribution, improving the accuracy of sample depth analysis, and accelerating the three-dimensional imaging of the sample.

This invention belongs to the field of optical fiber testing and sensing technology, specifically relating to a method for identifying faults and disturbances in few-mode optical fibers using Raman-enhanced time-domain reflectometry (TDDR). The method includes: signal transmission based on pulse coding and mode-selective excitation; signal-to-noise ratio enhancement based on distributed Raman amplification; mode demultiplexing and mode field detection; coded demodulation and reconstruction using a multi-mode few-mode optical TDDR; multi-dimensional fault identification based on mode-dependent loss and coupling characteristics; and multi-mode differential and high-precision positioning based on digital signal processing. This invention targets high-capacity communication and distributed sensing systems using few-mode fibers. It solves the problem of detecting weak inter-mode scattering signals by coordinating pulse coding gain and distributed Raman optical gain. Subsequently, it utilizes the unique mode-dependent loss and inter-mode energy transfer characteristics of few-mode fibers for joint decision-making, providing highly sensitive, multi-dimensional optical fiber link health monitoring capabilities. This method has great potential and application prospects in the operation and maintenance of next-generation space-multiplexed optical networks.

The present disclosure proposes a method and device for configuring a spatial reuse field in a wireless LAN system. Particularly, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB A-PPDU to the transmission STA through a 320 MHz band. The trigger frame includes a common information field and a special user information field. The common information field includes first to fourth spatial reuse fields. The special user information field includes fifth and sixth spatial reuse fields. The TB A-PPDU includes an HE TB PPDU for a primary 160 MHz channel and an EHT TB PPDU for a secondary 160 MHz channel.

Proposed are a method and an apparatus for configuring a space reuse field in a WLAN system. Specifically, a receiving STA receives a trigger frame from a transmitting STA. The receiving STA transmits a TB PPDU to the transmitting STA through a 320 MHz band. The trigger frame includes first and second non-HT Dup PPDUs. In a first non-HT Dup PPDU, all fields are copied and transmitted for each 20 MHz channel over a first 160 MHz channel having a low frequency within a 320 MHz band. In a second non-HT Dup PPDU, all fields are copied and transmitted for each 20 MHz channel over a second 160 MHz channel having a high frequency within the 320 MHz band. The first non-HT Dup PPDU includes a first common information field and a first special user information field. The second non-HT Dup PPDU includes a second common information field and a second special user information field.

A technical solution of an access point (AP) is disclosed, the AP comprising a processing device and a transceiver. The processing device can receive, at the AP from a station (STA), information about an interference path between the STA and the AP; select, at the AP based on the information about the interference path between the STA and the AP, a transmit power; and determine, at the AP based on the transmit power, a transmission type, wherein the transmission type comprises one or more of a spatial multiplexing transmission or a spatial nulling transmission. The transceiver can transmit, from the AP to the STA, a transmission based on the transmission type.

This disclosure provides methods, components, devices and systems for channel access in coordinated spatial reuse. Some aspects more specifically relate to a shared access point (AP) ignoring the network allocation vectors (NAVs) indicated by transmissions from the sharing AP and the other shared APs during a shared transmission opportunity (TXOP). In some examples, the shared AP may ignore the NAVs indicated by transmissions from the sharing AP and the other shared APs during the shared TXOP in association with the control message transmitted by the sharing AP indicating that the TXOP is designated for spatial reuse also may indicate a transmit power backoff. Various aspects relate to the application of the transmit power backoff and the transmission schedule indicated by the control message for the duration of the shared TXOP by a shared AP. Various aspects relate to handling transmission by a shared AP during overlapping shared TXOPs.

A method for accelerating Scloud+ algorithm based on multi-thread matrix multiplication. S1, a coarse-grained parallel architecture is constructed; S2, the AES-128 encryption module of the matrix A generation link in Scloud+.KEM is optimized by GPU native; S3, a local variable storage reuse strategy is adopted, and the local matrix variables with non-overlapping life cycle are stored in the storage space; S4, a pre-computation and persistence mechanism is introduced, and the pre-computation of the index data required for the generation of the matrix A is completed in the program initialization stage; S5, instruction level deep optimization; S6, a warp level fine-grained synchronization mechanism is constructed; S7, a double-thread cooperation fine-grained parallel implementation based on the coarse-grained architecture. Through the multi-dimensional collaborative innovation of architecture, memory hierarchy and instruction set, the computing, storage and communication bottlenecks of the post-quantum cryptography algorithm Scloud+ on the general parallel computing architecture are systematically solved.

This invention discloses a multi-dimensional joint control method for electromagnetic beams based on anisotropic holographic metasurfaces. It aims to address the shortcomings of existing multi-beam multi-dimensional control capabilities and the problems of inter-beam coupling and interference. The method includes: 1) constructing a target field according to the requirements of the actual application scenario, selecting a feed source, and determining its excitation reference field; 2) calculating the metasurface impedance components using tensor holography theory based on the target field and reference field to complete the physical structure design; 3) introducing a fully polarized modulation matrix into the target field expression and adding power allocation coefficients for beams of different polarizations to achieve joint control of arbitrary polarization and different energy ratios; 4) introducing a spatial multiplexing strategy into the beam field to jointly optimize the propagation direction and initial radiation position of different beams; and simultaneously combining polarization isolation and amplitude-phase modulation to achieve stable multi-beam transmission. This invention can effectively improve the anti-interference capability and energy utilization of multi-beam transmission, meeting the requirements of system applications.

To suppress gain reduction and SINR reduction due to inter-panel interference in spatial multiplexing of multiple pushes to multiple transmission / reception points. [Solution] The node is a node that connects to one of several transmit / receive points in an environment where they do not perform cooperative control with each other, and transmits an RRC message containing information indicating that there are multiple transmit / receive points, receives a reference signal via the first transmit / receive point, multiplexes and transmits information indicating a precoding index corresponding to a first precoding matrix calculated using the reference signal and a codebook to a first physical downlink control channel transmitted from the first transmit / receive point, and receives a physical uplink sharing channel transmitted using a precoding matrix formed by combining the first precoding matrix and the second precoding matrix.

An objective of the present invention is to provide a radio communication system capable of suppressing a reduction in channel capacity caused by an error in the orbit prediction of an aerial base station when spatial multiplexing transmission is performed between the aerial base station and a ground station, the aerial base station moving around in an orbit in the sky and being capable of periodically communicating with the ground station. To this end, a processor circuit provided in one or both of the ground station and the aerial base station is configured to execute: capacity calculation processing for calculating a channel capacity between the ground station and the aerial base station on the basis of an orbit prediction of the aerial base station; and communication control processing for switching an antenna used in spatial multiplexing transmission between the ground station and the aerial base station on the basis of the channel capacity calculated in the capacity calculation processing. The communication control processing includes processing whereby switching of the antenna used for spatial multiplexing transmission between the ground station and the aerial base station, in a time period during which communication between the ground station and the aerial base station is possible, is suppressed to a greater extent in a first time period in which the degree of change over time in the channel capacity calculated in the capacity calculation processing is equal to or greater than a preset reference, than in a second time period other than the first time period, within the time period during which communication is possible.