32 results about "Signal field" patented technology

A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT (Extremely High Throughput) Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF), and the EHT-SIG-A includes at least one subfield indicating that the communication device performs communication in a frequency band more than 160 MHz.

This invention provides a method and system for alarm event reporting and remote response linkage based on wireless communication, relating to the field of intelligent security monitoring technology. The method includes: collecting raw sensor data at three-dimensional spatial state sensing anchor points deployed on the top of the equipment casing (acoustic resonant cavity), the bottom inertial reference plane, and the lateral electromagnetic shield); performing trajectory decoupling and phase synchronization processing on the raw sensor data to obtain processed data; converting the processed data into a unified alarm trigger event; performing multi-source feature analysis on the alarm trigger event to obtain event analysis results; extracting the spatial vector coordinates and dynamic stress distribution gradient of the three-dimensional spatial state sensing anchor points based on the event analysis results, introducing the attenuation characteristics of intermolecular van der Waals forces to map the signal field, and constructing a three-dimensional spatial situation fitting ellipsoid. This invention achieves efficient end-to-end coordination between on-site alarms and remote dispatching.

This invention discloses a vehicle cooperative positioning system for traversing continuous blind zones, comprising a module for acquiring multi-source observation data, a module for constructing a spatiotemporally consistent cooperative factor graph, a cooperative constraint optimization module, an adaptive cooperative strategy adjustment module, and a cooperative information re-fusion module. This invention belongs to the field of data processing technology, specifically a vehicle cooperative positioning system for traversing continuous blind zones. This scheme employs observability-driven cooperative constraint construction and spatiotemporally consistent cooperative factor graph modeling, maintaining high observability and stable positioning even in scenarios without satellite signals, achieving unified fusion of multi-source heterogeneous data. It utilizes communication quality-driven adaptive cooperative switching and predictive prior constraints for delay-compensated re-fusion, achieving autonomous positioning without drift during communication interruptions and unified global trajectory calibration after communication recovery, providing high-precision and continuous positioning support for traversing continuous blind zones.

A method for wireless communication, a transmitter, and a receiver are provided. The method includes the following. A transmitter transmits a first ultra-high reliability (UHR) enhanced long range (ELR) physical layer protocol data unit (PPDU). The first UHR ELR PPDU at least includes a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field, a universal signal (U-SIG) field, a UHR-STF, a UHR-LTF, a data field, and a packet extension (PE) field, where the data field is transmitted at a granularity of a first frequency-domain resource unit with N times duplication in a bandwidth of the first UHR ELR PPDU, and N equals to 4.

A communication apparatus includes a receiver that receives a PPDU and circuitry that processes the PPDU. The PPDU includes a first signal field, a second signal field, a third signal field including a version independent part and a version dependent part, and an EHT-SIG field or a future signal field defined in future PPDUs newer than an EHT-PPDU. The second signal field indicates whether a PHY version of the PPDU is not older than a defined PHY version. The version independent part is consistent in location across the EHT-PPDU and the future PPDUs. The version independent part includes a PHY version identifier, an uplink / downlink flag, a BSS color, and a TXOP duration. The PHY version identifier contains a defined number of version independent bits that indicates the PHY version of the PPDU. The third signal field is BPSK modulated and is consistent across the EHT PPDU and the future PPDUs.

This application provides a phase tracking method, apparatus, device, and medium for a multi-user system receiver, applied to a target WiFi receiver; the method includes: demodulating an ultra-high throughput modulated signal to obtain a corresponding ultra-high throughput signal field, extracting each user-specific configuration block of the ultra-high throughput signal field, verifying the user-specific configuration block to obtain a verification result, determining a joint pilot set based on the verification result, and performing phase tracking based on the joint pilot set using a digital phase-locked loop.

The present application relates to a kind of well seismic signal-noise superposition wave field high-dimensional multi-component feature intelligent separation method, belong to geophysical oil and gas resource exploration field.Establish time-domain multi-component decomposition result serves different dimension differentiation characteristic property expression;Six-dimensional characteristic attribute space based on multi-component signal-noise component is established, and the mathematical characteristics of complex signal wave and multiple types of noise in DAS record, such as direct wave and reflected wave, are revealed;Dual-stage highly integrated framework with tree model as base learner is set up to complete the feature point category determination separation task in high-dimensional attribute space, so as to accurately and efficiently realize low-damage preservation of signal wave field and maximum suppression of noise wave field.The method is flexible, accurately preserves the amplitude characteristics and frequency energy components of DAS two-dimensional exploration record signal field in well, the mathematical basis is reliable and reliable, and the feature is strongly interpretable, which provides an important basis for thin and fine layer detection, oil and gas reservoir exploitation and other practical applications.

The application provides a communication method and a WLAN communication device for reducing a peak-to-average ratio of a WLAN signal, for transmitting a physical layer protocol data unit (PPDU) containing a legacy signal field (L-SIG), the communication method comprising: configuring a state value of a first field in the L-SIG to indicate whether a second field in the L-SIG is subjected to scrambling processing; when the first field is a first state value, not performing scrambling processing on the second field, and when the first field is a second state value, performing scrambling processing on the second field; and transmitting the PPDU.

A method and device are provided for receiving and transmitting data in a wireless local area network. The device receives a Physical Layer Protocol Data Unit (PPDU) from a station across a transmission bandwidth and determines whether the station belongs to a Basic Service Set (BSS) managed by the device, based on the PPDU. When the PPDU is multi-user (MU-PPDU), the access point (AP) determines that the station does not belong to the BSS managed by the AP. Such an MU-PPDU includes a first signal field and a second signal field; the first signal field contains bandwidth information indicating the transmission bandwidth, and the second signal field contains user-specific information allocated for orthogonal frequency-division multiple access (OFDMA) transmission.

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.

This invention relates to an automatically adjustable radio frequency (RF) attenuation circuit. It includes a detector unit, an RF switch, and an attenuation unit. The detector unit outputs a control voltage based on the magnitude of the input RF signal, driving the RF switch and attenuation unit to automatically switch between multiple attenuation levels. The attenuation unit is constructed using a π-type resistor network and switching diodes, with input and output voltage standing wave ratios (VSWRs) both less than 1.3. This invention requires no external control and can automatically adjust the attenuation based on the input signal amplitude. It is suitable for high-frequency and small-signal scenarios and has the advantages of low cost and stable performance.

A method and a device for receiving a PPDU in a wireless LAN system are presented. Specifically, a receiving STA receives a PPDU from a transmitting STA through a broadband and decodes the PPDU. The PPDU includes a legacy preamble and first and second signal fields. The legacy preamble and the first and second signal fields are generated on the basis of a first phase rotation value. When the broadband is a 320 MHz band, the first phase rotation value is [1 1 1 −1 1 1 1 −1 −1 −1 −1 1 −1 −1 1 −1].

The embodiment of the application relates to the technical field of communication, and discloses a radio signal detection and identification method, equipment, medium and product; the method comprises the following steps: acquiring time-frequency distribution data of a radio signal, and obtaining a frequency domain feature matrix based on the time-frequency distribution data; determining a target signal region in the time-frequency distribution data, and extracting complex spectrum data corresponding to the target signal region; performing inverse transformation on the complex spectrum data, and reconstructing to obtain a time domain signal component corresponding to the target signal region; mapping the time domain signal component into a time domain feature matrix which is adapted to the dimension of the frequency domain feature matrix; fusing the frequency domain feature matrix and the time domain feature matrix in a channel dimension, constructing multi-channel image data, and inputting the multi-channel image data into a target detection model for identification, so that the identification precision of the radio signal in a multi-signal scene is improved.

The utility model discloses a lithium electric welding machine chopper drive circuit belongs to drive circuit technical field, including pulse generation controller, photo -coupler drive module, chopper power device, pulse generation controller output signal source generates control pulse signal to photo -coupler, this photo -coupler obtains pulse signal and exports to transistor Q1 and transistor Q2, transistor Q1 and transistor Q2 according to the level state of photo -coupler output signal, the conduction and cut -off of control circuit, transistor Q1 and transistor Q2 drive field effect transistor Q3 and field effect transistor Q4 provide drive signal for chopper power device, the drain electrode of field effect transistor Q3 is connected with power VCC, and the source is connected with chopper power device, the drain electrode of field effect transistor Q4 is connected with chopper power device, and the source is grounded.

A transmission apparatus comprises an assignment information generator which, in operation, assigns resources on a resource unit (RU) basis to one or more terminal stations (STAs) and generates assignment information that specifies RUs allocated to the one or more STAs; a transmission signal generator which, in operation, generates a transmission signal that includes a legacy preamble, a non-legacy preamble and a data field, wherein the non-legacy preamble comprises a first signal field and a second signal field that carry a set ID and the assignment information, and wherein the set ID identifies one assignment set comprising the one or more STAs and a plurality of assignment indices, and wherein the assignment information comprises a resource assignment indication for each of a plurality of assignment which are referenced by the plurality of assignment indices; and a transmitter which, in operation, transmits the generated transmission signal.

Disclosed herein is a method performed by a wireless device to perform non-primary channel access (NPCA). The method includes responsive to detecting an overlapping basic service set (OBSS) physical layer protocol data unit (PPDU) in a primary channel of the BSS, transmitting a PPDU in a NPCA primary channel of the BSS, wherein the PPDU includes an indication that the PPDU is transmitted as part of a NPCA operation. The method further includes terminating the NPCA operation before OBSS transmission in the primary channel of the BSS is expected to end. The indication that the PPDU is transmitted as part of the NPCA operation may be included in a common information field of a trigger frame or a signal field of a preamble.

This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs for special cases such as, for example, full-bandwidth multi-user multiple-input multiple-output (MU-MIMO), single-user (SU) preamble puncturing, hybrid automatic repeat request (HARQ), and multi-AP coordination. Multi-AP coordination may refer to coordinated beamforming (CoBF), joint transmission (JT), or coordinated orthogonal frequency division multiple access (C-OFDMA). Additionally, or alternatively, some implementations more specifically relate to preamble designs that accommodate signal fields of different cases.

The application discloses a modeling method of a consciousness core model with signal noise correction, and belongs to the technical field of brain-computer interfaces. The application takes a consciousness core evolution model as a bottom theory, adds an adaptive noise correction term aiming at noise interference of brain signals, and the corrected core evolution relation satisfies M_corrected=M_core+alpha*exp(-beta*sigma^2), wherein Mcore is an original consciousness core model, sigma is noise intensity of input brain signals, and alpha and beta are characteristic calibration parameters corresponding to a signal scene. The application can improve the signal-to-noise ratio of EEG signals by more than 20%, improve consciousness decoding accuracy by more than 15%, support small sample rapid adaptation to different brain signal scenes, is suitable for all brain-computer interfaces, neural medical diagnosis and other fields, and has extremely high commercial value.

This invention relates to the fields of quantum electromagnetic measurement and radar direction finding, specifically to a sum-difference beam direction finding method and system based on Rydberg atoms. The method includes: establishing a Rydberg atom gas cell; introducing the target signal field and two local oscillator fields into the Rydberg atom gas cell; adjusting the phase difference between the two local oscillator fields so that the two local oscillator fields and the target signal field are superimposed within the Rydberg atom gas cell to form a spatial interference field; generating a difference frequency signal in the Rydberg atom gas cell based on the interaction between the target signal field and the local oscillator fields; extracting the amplitude and phase information of the difference frequency signal; establishing a mapping relationship between the angle and the sum-difference amplitude ratio; and determining the incident direction of the target signal field by combining the phase information corresponding to the difference beam. This invention is used to achieve high-precision angle measurement, improve the performance bottleneck of traditional radar angle measurement, and expand the application boundaries of Rydberg atom electric field meters.

A method and receiving device for estimating WiFi signal bandwidth are disclosed, relating to the field of wireless communication technology. In this method, the receiving device uses a long training sequence in the preamble of the received WiFi signal for bandwidth estimation, avoiding reliance on signaling fields. This allows the receiver to obtain WiFi signal bandwidth information before decrypting the signaling fields, enabling it to employ optimal multi-channel combining configuration during the signaling processing stage, thereby improving the combining gain of the WiFi signal.

This invention discloses a micro-expression recognition method based on AU structural dependency enhancement and multi-level prototype aggregation, belonging to the field of computer vision and emotion computing. The method includes the following steps: Step 1: Obtain micro-expression video sequences from a publicly available dataset, preprocess them to obtain start frame and keyframe image pairs; Step 2: Construct a micro-expression recognition model based on AU structural dependency enhancement and multi-level prototype aggregation; Step 3: Pre-train and fine-tune the micro-expression recognition model, simultaneously constructing an overall loss function to constrain the model, and then training and optimizing the model to obtain a trained micro-expression recognition model; Step 4: Obtain facial expression samples of the current person, and perform micro-expression recognition based on the trained micro-expression recognition model. This invention can simultaneously focus on local subtle movements, model AU structural dependencies, and integrate multi-level emotional semantics, improving the model's recognition performance and robustness in complex and weak signal scenarios.

The application relates to a single-pump dual-polarized erbium-ytterbium co-doped optical fiber amplification device, and belongs to the optical signal field.The device comprises a signal light source, a pump laser, a coupler, a first-stage erbium-ytterbium co-doped optical fiber, an optical isolator and a second-stage erbium-ytterbium co-doped optical fiber; the signal light source and a light source emitting port of the pump laser are flush with one end of the coupler, one end of the coupler receives the signal light source and the light source of the pump laser, the other end of the coupler is connected with the first-stage erbium-ytterbium co-doped optical fiber, and two ends of the optical isolator are respectively connected with the first-stage erbium-ytterbium co-doped optical fiber and the second-stage erbium-ytterbium co-doped optical fiber; the distance L1 between one end of the optical isolator and the first-stage erbium-ytterbium co-doped optical fiber is a preset value.The application solves the problems that the erbium-ytterbium co-doped optical fiber amplification device is affected by reverse amplified spontaneous emission and the use quantity of pump lasers is increased due to the two-stage direct connection structure.

This disclosure provides a communication method, communication device, storage medium, and program product, relating to the field of communication technology, and can solve the technical problem of short silence duration in related technologies. The method is applied to a first node, of which there are multiple first nodes; the method includes: sending a delayed signal frame to a second node; the delayed signal frame includes a traditional signal field / domain; the L-SIG field is the same in the delayed signal frames sent by different first nodes.

The application discloses a multi-line metro passenger flow cooperative prediction and management system based on digital information transmission, comprising: a signal field strength entropy sensing module, which generates a large passenger flow early warning signal by using the global synchronous decline of the spatial distribution entropy of wireless communication quality parameters; a train control information frame analysis module, which analyzes the train door action time sequence and operation parameters, and outputs the cross-line transfer passenger flow through a micro-scale mapping model; a dynamic guidance decision module, which generates a preferential price according to the comparison between the transfer passenger flow and the transport capacity, and pushes the guidance information through a differentiated transmission priority; a closed-loop feedback self-calibration module, which collects passenger response behavior and actual paths, and returns feedback signals to adjust the parameters of each module. The four modules are linked through the same digital information transmission infrastructure to form a sensing, tracking, guidance, and feedback closed loop. The application realizes advanced warning, precise tracking without privacy dependence, high response rate guidance, and system continuous evolution, and completely reuses the existing communication and signal facilities of the metro.

This disclosure relates to the field of communication transmission technology, specifically to a signal detection method, a signal detection device, and an electronic device. The signal detection method includes: acquiring a frequency domain signal to be processed based on wireless transmission; determining a first power delay spectrum of multiple traditional long training fields; determining a decision symbol sequence through hard-decision traditional signal fields; determining a second power delay spectrum of the decision symbol sequence; performing channel estimation on the extended long training fields based on the first and second power delay spectra to obtain the channel estimation result of the extended long training fields; and performing data detection based on the channel estimation result to obtain data information transmitted through the frequency domain signal to be processed. This method enables multi-dimensional joint characterization of the multipath characteristics of wireless channels, effectively suppressing noise and improving the accuracy of channel statistical characteristics, thereby effectively reducing transmission errors, improving data transmission reliability, and ensuring overall wireless communication performance.

A control method for a communication device is provided. The control method includes: receiving a wireless frame for multi-user multiple input, multiple output (MU-MIMO) communication that conforms to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards series, the wireless frame including a preamble that contains a Universal Signal field (U-SIG) as a first signal field, and a second signal field which contains information specifying a number of streams for 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, wherein the information specifying the MCS indicates that a different MCS is to be used for each of a first stream and a second stream directed at a specific communication device; and decoding the received wireless frame.

The present invention provides a communication method, communication device, and storage medium that reduce overhead and improve throughput. [Solution] The method includes the steps of generating a physical layer protocol data unit (PPDU) and transmitting the PPDU. The first signal field of the PPDU includes a resource unit allocation subfield and a user field for each user, the resource unit allocation subfield indicating the frequency domain resources of the user in each user field, the user in each user field includes a first user using coupled source channel coding, the PPDU further includes a second signal field for the first user using coupled source channel coding, the second signal field for the first user indicates the coupled source channel coding parameters of the first user's source layer, and the second signal field for the first user is located on the first user's frequency domain resources.

The application discloses a method and system for improving the close-range detection capability of a laser range finder, and comprises the following steps: a laser range finder emits a measuring laser to a target, receives a returned light signal, and acquires a first signal energy; it is judged whether the first signal energy is greater than a preset threshold; if yes, the next step is executed; the sensitivity of a photoelectric detection component is reduced, so that the photoelectric detection component is in a low sensitivity state, and the target is measured; it is judged whether the returned light signal is a valid signal; if yes, the sensitivity of the photoelectric detection component is improved. The application actively reduces the sensitivity of the photoelectric detection component by intelligently judging a close-range strong signal scene, suppresses a stray echo from a source of signal generation, and makes the energy of the stray echo lower than a detection threshold, so that false signal generation is fundamentally avoided; after the stray light is suppressed, a secondary energy judgment is performed, the valid target signal is ensured not to be excessively suppressed, the adaptive closed-loop adjustment of the sensitivity is realized, and the requirements of suppressing interference and keeping signal detection capability are met.

An apparatus for wireless communication, comprising: a memory that stores instructions; and a processor coupled with the memory, wherein the processor and the memory are configured to: generate a signaling field, SIG, in a wireless local area network, WLAN, the SIG comprises a resource unit, RU, allocation field, indicating a size and location of each RU in a frequency resource, the SIG further comprises one or more user field, each user field comprises information of a scheduled station, STA; wherein a MRU which comprises multiple RUs is allowed to be assigned to one STA; and transmit the SIG.

The application provides a flight calibration evaluation method of a microwave landing system, and aims at the problem of insufficient spatial resolution of collected data in the MLS flight calibration process. The radial basis function neural network interpolation method is used to post-process the sparse data collected in the flight calibration, the collected sparse data is used as a training set, high-precision interpolation is realized in a three-dimensional space, MLS three-dimensional space signal field type inversion reconstruction is realized, and thus the MLS complete space signal field type is evaluated. The application provides an MLS flight calibration evaluation method without the aid of a large number of complicated flight subjects, and improves the accuracy and efficiency of the MLS flight calibration.