455 results about "Signal field" patented technology

The invention discloses a signal identification method based on broadband spectrum detection, and the method comprises the steps: carrying out the power spectrum estimation and signal detection of broadband IQ data through an FPGA, obtaining a signal frequency point parameter, and configuring a DDC module to complete digital down conversion; performing power spectrum density estimation and noise floor estimation on the narrowband IQ signal on the upper computer; preliminary classification is carried out by calculating a ratio parameter C1 of a maximum value and a second maximum value of a frequency spectrum, and when C1 is greater than a threshold, AM and a single carrier signal are discriminated by combining a frequency spectrum characteristic parameter C2 and an amplitude spectrum characteristic parameter C3; when C1 is smaller than or equal to a threshold, signal detection is carried out by adopting a double-threshold algorithm, and merging and screening in a multi-signal scene are completed; classifying based on a normalized zero center instantaneous amplitude spectrum density maximum value parameter C4, judging FM, MSK and FSK signals when the C4 is less than a threshold, and judging BPSK, QPSK, 8PSK and 16QAM signals when the C4 is greater than or equal to the threshold; according to the method, a multi-parameter joint judgment strategy is adopted, and the accuracy and the real-time performance of signal recognition are remarkably improved.

The embodiment of the invention discloses a vehicle key control method and device, a vehicle key and a storage medium. The method comprises the following steps: acquiring Bluetooth signal field intensity information between a key terminal and a vehicle terminal, and determining a position relation of the key terminal relative to the vehicle terminal based on the Bluetooth signal field intensity information; if the position relationship represents that the key terminal is located outside the vehicle welcome area, controlling the ultra wide band module to be in a dormant state; the Bluetooth signal receiving strength between the key terminal and the vehicle end anchor point is obtained, and if the Bluetooth signal receiving strength is larger than a preset Bluetooth signal receiving strength threshold value, an ultra-wideband communication module is controlled to be started so as to establish an ultra-wideband communication session between the key terminal and the vehicle end anchor point; a distance value between the key terminal and the vehicle terminal is determined based on the ultra-wideband communication session, and an operating parameter of the ultra-wideband communication module is adjusted based on the distance value. According to the embodiment of the invention, the problem of high power consumption caused by starting the ultra-wideband communication module for a long time can be avoided, and the communication mode and parameters are flexibly adjusted, so that the communication between the vehicle and the key is more intelligent and personalized.

The invention discloses an electroencephalogram emotion recognition method based on a hierarchical multi-scale map neural network, and belongs to the technical field of emotion calculation and bio-electricity signal processing. According to the method, structural innovation is carried out on the basis of a traditional graph neural network, a multi-scale graph network model with layer-by-layer feature enhancement from local to global is constructed, and the core lies in optimization and improvement of graph structure modeling, a feature fusion mechanism and global dependency capture capability. According to the model, local graph convolution is combined with a random walk normalized matrix, and inter-electrode spatial dependence modeling is enhanced; a virtual brain region center and an SE channel attention mechanism are introduced into the mesoscale layer, and cross-brain region emotional features are effectively extracted; a simplified Transform structure is adopted in a global layer to capture a long-distance cross-time step feature relationship, and finally, the feature expression capability and robustness are improved in combination with a diffusion generation network. According to the method, the model weight is kept, meanwhile, high-precision modeling of the complex emotion mode of the EEG signal is achieved, the accuracy, stability and cross-subject generalization ability of emotion recognition are remarkably improved, and the novel efficient emotion recognition method suitable for the multi-source physiological signal scene is provided.

A physical layer (PHY) that includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an Extremely High Throughput Signal A Field (EHT-SIG-A), an Extremely High Throughput Signal B Field (EHT-SIG-B) including a field of four or more bits indicating the number of Space-Time Streams, an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF) in this order is used.

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.

A station that wirelessly communicates is disclosed. The station comprises a transceiver and a processor. The processor is configured to: receive, using the transceiver, a triggering frame that triggers transmission by the station; on the basis of the type of triggering frame and a type of trigger-based (TB) physical layer protocol data unit (PPDU) transmitted in response to the triggering frame, determine a value of a Length field of a signaling field of the trigger-based PPDU, the Length field indicating a value used to calculate a duration of the TB PPDU; and transmit the TB PPDU.

The invention discloses a multi-objective optimization base station layout method, which comprises the following steps: firstly, determining a base station layout area boundary, and determining a system coverage area boundary; then determining a precision factor function and a signal field intensity function used in the optimization process; setting initial parameters of a multi-objective optimization algorithm; the precision factor calculation equation and the signal field intensity calculation equation are used as fitness functions of a multi-objective optimization algorithm for iterative circulation; and obtaining a final Pareto frontier solution set, and selecting a layout scheme from the Pareto solution set according to an actual terrain environment to arrange the navigation base station, so that the layout of the base station is completed. According to the method, the system signal coverage range is introduced, so that the coverage range of the land-based navigation system can be expanded while the precision factor distribution is optimized.

Disclosed are methods, systems, and computer-readable medium to perform operations including generating an extended range physical layer protocol data unit (ER-PPDU) for transmission to a receiver, the ER-PPDU including an ultra-high reliability extended range long training field (UHR-ER LTF) and an ultra-high reliability extended range signal field (UHR-ER SIG), and transmitting the ER-PPDU to the receiver, in which at least one of the UHR-ER-LTF or the UHR-ER-SIG is repeated two or more times in the time domain or the frequency domain.

This application provides a data transmission method and a related apparatus. The method includes: A network device generates a first physical layer protocol data unit PPDU. The first PPDU includes a first universal-Signaling field U-SIG field and a first extremely high throughput-Signaling field EHT-SIG field, a sum of a quantity of information bits of the first U-SIG field and a quantity of information bits of the first EHT-SIG field is less than or equal to 78 information bits, and at least one of the first U-SIG field and the first EHT-SIG field includes an identifier indication field, where the identifier indication field is used to uniquely identify one station. The network device sends an encoded first PPDU to a station. In this way, indication overheads can be reduced, and the first U-SIG field and the first EHT-SIG field can carry more information. Embodiments of this application may be applied to a wireless local area network system supporting a next-generation Wi-Fi EHT protocol of the IEEE 802.11, that is, 802.11 protocols such as 802.11be.

The invention relates to the technical field of electromagnetic detection, in particular to an anti-electromagnetic interference Rydberg atom receiving device and method. The device comprises two parallel plate waveguide atomic probes with integrated optical fiber gas chambers, a 852nm frequency stabilization module, a 509nm frequency stabilization module and three microwave sources. The three microwave sources are respectively used for generating a local oscillation field signal, a signal field signal and an interference field signal; an alkali metal atom gas chamber is embedded in each of the two parallel plate waveguide atom probes, a first alkali metal atom gas chamber in the first parallel plate waveguide atom probe receives a local oscillation field signal, a signal field signal and an interference field signal, and mixes the local oscillation field signal and the signal field signal to generate an intermediate frequency signal; the second parallel plate waveguide atom probe is used for realizing signal interference resistance by compensating alternating current stark energy shift; the device provided by the invention is simple in structure and high in sensitivity, the anti-interference capability of microwave signal detection can be effectively improved, and the signal detection precision and reliability of the device in a complex electromagnetic environment are ensured.

The present disclosure provides a communication apparatus including circuitry, which, in operation, generates a transmission signal that includes a signal field and a data field, the signal field indicating one or more user-specific allocations in the data field. An aggregate medium access control protocol data unit (A-MPDU) transmitted in each of the one or more user-specific allocations is segmented into one or more code blocks. The communication apparatus includes a transmitter, which, in operation, transmits the generated transmission signal and a receiver, which, in operation, receives a null data packet (NDP) or a medium access control (MAC) frame carrying hybrid automatic repeat request (HARQ) feedback information for the one or more code blocks.

One example according to the present specification relates to a technique related to configuration of a preamble in a wireless LAN (WLAN) system. According to various embodiments, a receiving STA may receive an NDP frame. The NDP frame may comprise a first signal field and a second signal field. The first signal field may comprise first information about a PHY version. The second signal field may comprise second information about transmission of a PPDU, set on the basis of the first information. The receiving STA may perform channel sounding on the basis of the NDP frame.

According to various embodiments, a reception STA may receive a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field. The PPDU may be configured to be transmitted to a single user. The second signal field may consist of one content channel, and the one content channel may be duplicated in a first bandwidth in units of a second bandwidth.

One embodiment according to the present specification relates to a method for constructing a preamble in a wireless LAN (WLAN) system. According to various embodiments, a PPDU may comprise a first signal field and a second signal field. The first signal field may include first information about PHY version. The first information may be determined on the basis of whether the PPDU is an EHT PPDU. The second signal field may include second information about the transmission of the PPDU, which is set on the basis of the first information.

The invention relates to the technical field of integrated circuits, and discloses a data transmission method and device for interconnection between core particles, the core particles and a processing system.The method is applied to a first core particle and comprises the steps that a protocol layer of the first core particle receives to-be-transmitted data sent by a processor of the first core particle; a protocol layer carries out protocol layer overall packing on data to be transmitted to obtain a protocol layer packet, the protocol layer packet comprises a packet header field and a load area, the packet header field is used for identifying a channel type and a channel signal field of the load area, the channel type comprises at least one monitoring channel used for monitoring cache consistency between core particles, and the monitoring channel is used for monitoring cache consistency between the core particles. The packet header field is used for identifying a channel type and a channel signal field of the load area; and the protocol layer sends the to-be-transmitted data to the second core grain through the link layer and the physical layer of the first core grain based on the protocol layer packet. The problem of cache access consistency of processors among core particles is effectively solved.

A communication device communicates a radio frame including a preamble and a data field of a physical layer (PHY). The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG-A includes a subfield indicating whether data are concurrently transmitted from a plurality of communication devices to a common partner device.

The invention discloses a vehicle-mounted diagnosis system based on CAN communication and an adjustable power supply and a method thereof, and relates to the technical field of vehicle electronic diagnosis. Comprising the following steps: a CAN communication acquisition module is used for acquiring a multi-channel CAN message containing a timestamp; the data processing module is used for identifying a signal field in the message and generating a structured signal value; the signal semantic recognition module is used for matching the structured signal with the reference state data and determining a semantic tag of the structured signal; the anomaly detection module identifies structural anomaly, time anomaly and behavior anomaly based on rule judgment and time sequence prediction; the control instruction generation module is used for generating a power supply control instruction according to the abnormal level; and the adjustable power supply equipment module adjusts output voltage and current parameters according to the control instruction and feeds back a power supply state. According to the method, a closed-loop diagnosis process from CAN data acquisition, signal behavior modeling to power supply response control is constructed, and the method is suitable for application scenes such as function verification, anomaly recognition and system testing of the vehicle-mounted electronic control unit.

A radio-frequency receiver achieves high sensitivity by pumping atoms to high-azimuthal (≥3) Rydberg states. A vapor cell contains quantum particles (e.g., cesium atoms). A laser system provides probe, dressing, and coupling beams to pump the quantum particles to a first Rydberg state having a high-azimuthal quantum number ≥3. A local oscillator drives an electric field in the vapor cell at a local oscillator frequency, which is imposed on a distribution of quantum particles between the first Rydberg state and a second Rydberg state. An incident RF signal field interferes with the local oscillator field, imposing an oscillation in the distribution at a beat or difference frequency and, consequently, on the intensity of the probe beam. The beat frequency component of the intensity of the probe beam is detected, and the detection signal is demodulated to extract information originally in the RF signal.

This application relates to the field of wireless communication, and in particular, to a multi-channel hybrid transmission technology. In an embodiment, a data transmission method comprises: generating, by a first wireless communications device, a physical protocol data unit (PPDU), wherein the PPDU comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), and two signature symbols after the L-SIG in a time-domain, and wherein the two signature symbols are identical and are modulated based on binary phase shift keying (BPSK), the two signature symbols identify a wireless communications standard the PPDU complies with; and transmitting, by the first wireless communications device, the PPDU to a second wireless communications device.

According to various embodiments, a reception STA may receive a PPDU. The PPDU may comprise a first signal field and a second signal field. The first signal field may comprise a plurality of first content channels and a plurality of second content channels. The second signal field may comprise a third content channel and a fourth content channel.

Proposed are a method and device for receiving a PPDU in a wireless LAN system. Specifically, a reception STA receives the PPDU from a transmission STA through a wide band, 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 wide band is the 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].

This application relates to the wireless communication field, and is applied to a wireless local area network that supports the 802.11be standard. In particular, this application relates to a method including: An access point AP sends a trigger frame, where the trigger frame is used for triggering a station to send an extremely high throughput trigger based physical layer protocol data unit EHT TB PPDU. The station determines, based on one or two of a value indicated by an uplink EHT spatial reuse parameter UL EHT SRP and a value indicated by one or more uplink spatial reuse parameter UL SRP fields in a common information field of the trigger frame, a value indicated by a spatial reuse parameter SRP in a universal signal field U-SIG of the EHT TB PPDU. The STA sends the EHT TB PPDU to the AP.

In an IEEE 802.11 wireless system, a sharing AP device (1A) shares a transmission opportunity with a shared AP device (2A) by transmitting a coordinated spatial reuse opportunity announcement control frame packet having defined signal fields which are used by the shared AP device (2A) to compute a transmit power limit for limiting interference at a first sharing STA device (1S) associated with the sharing AP device (1A) when transmitting one or more first downlink packets from the shared AP device (2A) to a first shared STA (2S) device associated with the shared AP device (2A).

A quantum memory device 100 for storing a signal field 170 comprises an optical cavity comprising a first and second reflective surface 110, 120, a first and a second optical element 130,140 within th

This application discloses a data transmission method that includes: scrambling to-be-transmitted data, to obtain scrambled data; and sending the scrambled data to a receive device. The initialization bits of a scrambler used to scramble the data include a first bit sequence and a second bit sequence. The first bit sequence is carried in a service field of the to-be-transmitted data, the second bit sequence reuses a bit in a signal field of a physical layer protocol data unit (PPDU), and the quantity of the initialization bits is equal to the order of the scrambler. In embodiments of this application, when the transmit device and the receive device use the scrambler with a higher order than that in the conventional technology, the initialization bits of the scrambler are based on bits in an existing service field used for data scrambling and reused bits in some signal fields.

A transmission apparatus of the present disclosure comprises a transmission signal generator which 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, the second signal field comprising a first channel field and a second channel field, each of the first channel field and the second channel field comprising a common field that carries resource assignment information for one or more terminal stations and a user-specific field that carries per-user allocation information for the one or more terminal stations, and wherein a part of the user-specific field of one of the first channel field and the second channel field whichever is longer than the other channel field in length before appending padding bits is relocated to the other channel field; and a transmitter which transmits the generated transmission signal.

According to various embodiments, a reception STA may receive a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field. The PPDU may be configured to be transmitted to a single user. The second signal field may consist of one content channel, and the one content channel may be duplicated in a first bandwidth in units of a second bandwidth.

The embodiment of the invention discloses a vehicle key control method and device, a vehicle key and a medium. The method is applied to a key terminal, and comprises the following steps: if the key terminal and a vehicle terminal are in an effective communication range, establishing Bluetooth communication connection with the vehicle terminal; acquiring a Bluetooth receiving signal field intensity value between the key terminal and the vehicle terminal, and determining a position relationship of the key terminal based on the Bluetooth receiving signal field intensity value; if the position relationship represents that the key terminal is located outside the vehicle, obtaining an anchor point Bluetooth receiving signal value corresponding to the vehicle end anchor point; an ultra-wideband communication session between the ultra-wideband communication module and the vehicle terminal is controlled based on the anchor Bluetooth receive signal value to calculate a distance value between the key terminal and the in-vehicle terminal based on the ultra-wideband communication session. According to the embodiment of the invention, accurate distance measurement can be carried out through an ultra wide band technology, and by controlling the start and stop of the ultra wide band communication module, the energy consumption of the vehicle key is reduced, and the service life of a battery of the vehicle key is prolonged.

This application provides a communication method and a related apparatus. The method includes: generating and sending a PPDU, where the PPDU includes a first signal field, the first signal field includes a resource unit allocation subfield and at least one user field corresponding to each user, the resource unit allocation subfield indicates a frequency domain resource allocated to the user corresponding to each user field, the user corresponding to each user field includes a first user that uses joint source and channel coding, the PPDU further includes a second signal field of the first user that uses joint source and channel coding, the second signal field of the first user indicates a joint source and channel coding parameter of a source layer corresponding to the first user, and the second signal field of the first user is located on a frequency domain resource allocated to the first user.

The invention discloses a mechanical fault diagnosis method, system and equipment based on intermittent vibration signals. The method comprises the following steps: 1, collecting and preprocessing a vibration signal, deploying a wireless vibration sensor at a key monitoring point of mechanical equipment, and designing a working mode of the sensor as intermittent sampling; 2, model construction: constructing a fault diagnosis model fusing a wide convolution kernel time sequence convolution network and a channel attention mechanism, specifically, extracting multi-scale features in the preprocessed vibration signals layer by layer through the time sequence convolution network of a bandwidth convolution kernel, and optimizing the feature weight of each channel in combination with the novel channel attention mechanism, and finally, a Softmax function is used for outputting. 3, model training; and 4, fault diagnosis. According to the method provided by the invention, in an intermittent signal scene, weak fault features in the signal can be effectively extracted. And when the time sequence of the signal is damaged to a certain extent, the diagnosis accuracy is superior to that of the traditional method.