431 results about "Channel sounding" patented technology

The invention relates to a microphone array sound source positioning method and system based on cross-correlation-beam forming closed-loop optimization, and belongs to the technical field of sound source positioning. The method comprises the following steps: collecting multichannel sound signals through a microphone array and preprocessing the multichannel sound signals to extract time-frequency features and suppress noise interference; time delay information among the microphones is estimated by adopting a generalized cross-correlation phase transformation algorithm, and an optimization strategy is introduced to improve estimation stability and anti-interference performance; enhancing the target sound source signal in combination with a minimum variance undistorted response beam forming algorithm and an adaptive Kalman filtering mechanism; constructing a closed-loop feedback optimization mechanism based on the beam output signal to realize feedback adjustment; and adopting a hybrid network architecture, taking the beam output signal amplitude spectrum as input, and outputting the frequency spectrum or mask of the obtained target sound source signal. The method has the advantages of high calculation efficiency, high positioning precision and strong anti-interference capability, and is suitable for real-time acoustic signal processing in a complex environment.

The invention relates to the technical field of unmanned aerial vehicle communication, and discloses a dynamic spectrum frequency hopping communication method and device for a target aircraft and a ground station, and the method comprises the steps: collecting state information; evaluating a signal quality indicator based on the power data; based on the total spectral range and the signal quality index, segmenting the total spectral range into N sub-bands to obtain a spectrum allocation result; based on the task priority and the communication quality index, carrying out main target machine election; each target machine sends an orthogonal detection sequence in a corresponding time slot to obtain channel state information; converting the channel state information into a frequency hopping key; generating a frequency hopping sequence based on the frequency hopping key; according to the invention, an adaptive frequency hopping technology based on a channel state is adopted, the channel quality is monitored in real time, and a dynamic frequency hopping sequence is generated, so that an interference frequency band is effectively avoided; through a time division multiplexing channel detection mechanism, signal overlapping is fundamentally avoided, and continuous and stable operation in a complex dynamic environment is ensured.

The invention provides a wind turbine generator blade defect determination method and device, and the method comprises the steps: carrying out the real-time monitoring of a target wind turbine generator blade, and obtaining a monitored panoramic image and a multi-channel sound signal; processing the multi-channel sound signal, and determining a beam set composed of multiple beams of beams in multiple space directions; performing spatial registration and fusion on the sound signals of the beam set and the panoramic image to determine a panoramic sound image; by using the relevance between the blade position in the panoramic image and the sound image extreme point, locking the wave beam of the blade head of the target wind turbine generator from the wave beam set, and determining a target wave beam; and according to the target wave beam and an anomaly classifier generated by convolutional neural network training, determining an anomaly monitoring result of the target wind turbine generator blade. According to the scheme, the interference problem and the maintenance cost problem of existing monitoring can be solved, and compared with the prior art, the reliability and the accuracy of a detection result can be further improved.

This disclosure describes systems, methods, and devices for configuring sounding reference signal resources across multiple frequency locations for device positioning. A device may encode for transmission a sounding reference signal (SRS) including a first set of SRS resources for a first transmission by a user equipment (UE) device to the node B network device at a first time and a second set of SRS resources for a second transmission by the UE device to the node B network device at a second time; decode the first transmission received from the UE device using the first set and a first bandwidth at the first time; decode the second transmission received from the UE device using the second set and a second bandwidth at the second time; and combine the first transmission and the second transmission for a device positioning estimation based on the first bandwidth and the second bandwidth.

The disclosure relates to determining a physical location of nodes in a wireless network comprising a plurality of nodes. Example embodiments include a method of determining a physical location of a plurality of nodes (102) in a wireless network (100), the method comprising: i) operating a first node (102m) of the plurality of nodes (102) in a scanning mode to detect a second node (102n) of the plurality of nodes (102) operating in an advertising mode within range of the first node (102m); ii) repeating step i) for other nodes of the plurality of nodes (102) to determine a list of node pairs that are within range of each other for each of the plurality of nodes (102) in the wireless network (100); iii) transmitting the list of node pairs from each of the plurality of nodes (102) in the wireless network (100) to a controlling node (101); iv) instructing by the controlling node (101) each of the node pairs to perform a channel sounding operation to determine a physical distance between the node pair; and v) constructing by the controlling node (101) a location map of the plurality of nodes (102) in the wireless network (100) based on the physical distance between each node pair.

A device provides through a Bluetooth connection with a primary anchor a Long Term Key (LTK) for use in a multi-anchor Bluetooth channel sounding (MABCS) process with the primary anchor and one or more secondary anchors, and the device then engages in the MABCS process. The MABCS process includes (a) sequentially at to each of multiple Bluetooth Low Energy (BLE) channels (i) transmitting a ping message, (ii) receiving sequentially from each of the anchors of the plurality, responsive to the ping message, a respective pong message, and (iii) using phase shift as a basis to determine, respectively for each anchor, a phase shift on the BLE channel, and (b) determining the distance of the device respectively from each anchor based at least on the phase shifts determined for respectively for the anchor on at least a first one of the BLE channels and a second one of the BLE channels.

The invention discloses a secure data transmission method for a wireless communication system, which relates to the technical field of secure data transmission and comprises three steps of key generation and synchronization, physical layer subcarrier encryption and key enhancement and authentication. The method comprises the following steps: firstly, extracting multi-dimensional features through channel detection to generate a dynamic initial key, and setting a trigger condition to realize key synchronization; then, a permutation matrix is generated by using a secret key to perform scrambling encryption on a data subcarrier position, and a receiving end performs descrambling and then performs feedback through CRC verification so as to guarantee data integrity; and finally, quantum noise is introduced to enhance the randomness of the secret key, and zero-knowledge authentication is adopted to verify the identity, so that the security and the anti-attack capability of wireless communication data transmission are effectively improved.

The invention relates to the technical field of Bluetooth positioning, and discloses a Bluetooth positioning method and device based on displacement auxiliary verification and a vehicle key system, and the method comprises the steps: generating a distance measurement signal in a current period of channel detection, and obtaining a first echo signal and a second echo signal of a to-be-positioned object in response to the distance measurement signal; determining corresponding initial positioning data of the to-be-positioned object in the current period according to the first echo signal and the second echo signal, and performing displacement auxiliary verification on the initial positioning data in the period to determine current verification positioning data of the to-be-positioned object; and acquiring corresponding historical verification positioning data of the to-be-positioned object in a previous period of the current period, and performing weekly displacement auxiliary verification by using the historical verification positioning data and the current verification positioning data to determine target positioning data of the to-be-positioned object. According to the invention, the number of frequency groups required by CS communication can be obviously reduced, the positioning efficiency is improved, and the positioning accuracy is also improved.

A wireless communication method and a device are provided. A first access point multi-link device (AP MLD) sends or receives a multi-AP MLD sounding announce frame. The multi-AP MLD sounding announce frame indicates at least one of: a sequence in which a plurality of AP MLDs perform channel sounding, a time at which the plurality of AP MLDs perform channel sounding, information of links used for the plurality of AP MLDs to perform channel sounding, information of a frequency band used for the plurality of AP MLDs to perform channel sounding, or information of a channel corresponding to the links and / or the frequency band used for the plu

The invention discloses a voiceprint monitoring method, system, medium and equipment for rotation stall of an aero-engine compressor, and the method comprises the steps: determining the layout of a microphone array through the model parameters of the compressor of the aero-engine, and carrying out the synchronous collection of sound pressure time domain signals of multiple channels of the compressor of the aero-engine through the microphone array; arranging the multi-channel sound pressure time-domain signals in sequence to construct a time-domain signal matrix; performing spectral analysis on the sound pressure time-domain signals by adopting a fast Fourier transform algorithm to obtain a spectrogram of the sound pressure time-domain signals of each channel, monitoring whether an abnormal single-tone frequency peak value lower than one time of rotation frequency appears in the spectrogram or not, obtaining an acoustic mode spectrogram of the abnormal single-tone frequency peak value by adopting a single-frequency acoustic mode decomposition method, and obtaining an acoustic mode spectrum of the abnormal single-tone frequency peak value; and whether the rotating stall characteristic of the gas compressor occurs in the acoustic mode spectrogram is monitored to judge whether the rotating stall characteristic of the gas compressor occurs or not.

In an aspect, a communications device obtains a residual AoA bias associated with a first AoA measurement of a RS-P transmitted from a wireless reference node to a first base station, the wireless reference node associated with a location known to the communications device, obtains a second AoA measurement associated with an uplink signal (e.g., PRACH, SRS, UL-SRS-P, etc.) transmitted from a UE to the first base station, and calibrates the second AoA measurement based on the residual AoA bias. In another aspect, a communications device obtains a residual AoD bias associated with a first AoD measurement of a RS-P transmitted from a first base station to a wireless reference node with a known location, obtains a second AoD measurement associated with a downlink signal (e.g., DL-PRS) transmitted from the first base station to a UE, and calibrates the second AoD measurement based on the residual AoD bias.

A method of wireless communication is disclosed herein. The method includes measuring a WB channel via FMCW channel estimation. The method includes selecting a WB SSB and a subband in a BWP based on the measured WB channel. The method includes performing a RACH procedure based on the WB SSB and the subband in the BWP. The method includes outputting an indication of the performed RACH procedure based on the WB SSB and the subband in the BWP.

The invention provides a vehicle abnormal noise positioning method and system based on digital twinning, and the method comprises the steps: collecting a multi-channel sound signal through a three-dimensional spherical microphone array, according to the arrival time delay inequality of vehicle abnormal noise to different microphone arrays, combining the geometric structure of the three-dimensional spherical microphone array, and carrying out the positioning of the vehicle abnormal noise. Estimating the azimuth angle of the abnormal noise of the vehicle relative to the corresponding microphone array, determining the position of the abnormal noise of the vehicle, and determining the absolute coordinate of the abnormal noise of the vehicle in a vehicle coordinate system according to the conversion relation between the three-dimensional spherical microphone array coordinate system and the vehicle coordinate system. And displaying the abnormal noise position of the vehicle in the digital twin of the vehicle. According to the scheme of the invention, the generation part of the abnormal noise of the vehicle can be quickly and conveniently judged, and the accuracy of positioning the abnormal noise of the vehicle is improved based on the three-dimensional spherical microphone array and time delay estimation.

This disclosure provides methods, devices and systems for channel sounding for wireless communications. Some implementations more specifically relate to scheduling sounding reference signal (SRS) resource sets for wireless devices having more than 4 receive (RX) antenna ports. In some implementations, a base station may determine an antenna switching capability of a user equipment (UE). The antenna switching capability indicates a number of RX antenna ports of the UE. The base station schedules a number of SRS resource sets for the UE based at least in part on the number of RX antenna ports in excess of four. For example, the number of RX antenna ports may be equal to 8. As another example, the number of RX antenna ports may be equal to 6. The base station further receives, from the UE, uplink transmissions of one or more SRS resources for each of the scheduled SRS resource sets.

The invention discloses a voiceprint identification method, system, medium and equipment for instable rotation of an aero-engine compressor, and the method comprises the steps: carrying out the synchronous collection of sound pressure time domain signals of multiple channels of the aero-engine compressor through a microphone array; arranging the multi-channel sound pressure time-domain signals in sequence to construct a time-domain signal matrix; converting the time-domain signal matrix into a frequency-domain signal matrix by adopting a fast Fourier transform algorithm, squaring the amplitude of the frequency-domain signal of each channel to obtain an auto-power spectrum signal of each channel, and outputting an average auto-power spectrogram; the method comprises the following steps: monitoring whether an asynchronous vibration component and a hump characteristic with the frequency difference of one time of rotation frequency appear in an average self-power spectrogram or not, and obtaining an acoustic mode spectrogram of an asynchronous vibration frequency peak value through a single-frequency acoustic mode decomposition method; the acoustic mode order at the asynchronous vibration frequency peak value does not meet the conversion-static interference formula, and the dominant acoustic mode orders are not correlated.

The invention provides a partial discharge mode recognition method based on multi-channel sound signal time-frequency space spectrogram fusion, and belongs to the technical field of partial discharge mode recognition. The problem that information redundancy and difference between existing multi-channel sound signals cannot be effectively fused and discriminant features cannot be extracted is solved. The method comprises the following steps: collecting and summarizing multichannel sound signal data corresponding to different partial discharge models as a data set; performing normalization processing on the original multichannel partial discharge sound signal, and mapping a time domain signal into time-frequency joint distribution to obtain a gray scale time-frequency spectrogram; performing multi-scale and multi-direction decomposition on the grayscale time-frequency spectrogram to obtain each channel sub-graph; different fusion strategies are used for fusing the channel sub-graphs obtained through decomposition; reconstructing a time-frequency space fusion spectrogram from the fused sub-graphs of each channel through inverse transformation; extracting features; identifying a partial discharge mode; the method is applied to partial discharge detection.

This disclosure provides methods, components, devices and systems for interference reduction between wireless communication devices of overlapping basic service sets (OBSSs). Some aspects more specifically relate to signaling mechanisms associated with an OBSS channel sounding operation and power control mechanisms associated with OBSS interference mitigation, either or both of which a first access point (AP) associated with a first basic service set (BSS) may leverage as part of a coordinated beamforming scheme with a second AP associated with a second BSS. In accordance with OBSS channel sounding, the first AP may associate a set of sounding packets with one or more parameters indicative of the second BSS such that the sounding packets appear, to OBSS stations (STAs), as in-BSS sounding packets. Additionally, or alternatively, the first AP may employ a power control mechanism according to which the first AP may apply portion-by-portion transmission power control.

The invention provides a channel knowledge map construction method and system based on nerve ray tracing, and the method comprises the steps: collecting the actual measurement data of electromagnetic wave propagation through deploying channel detection equipment; the actually measured data are preprocessed; training a deep learning model by using the preprocessed data and a material library, so that the deep learning model can learn a complex nonlinear relationship of interaction between electromagnetic waves and the environment; through a trained ray tracing frame based on a neural network, after a three-dimensional map and resolution are given, nerve ray tracing is carried out on each position, according to obtained multipath channel information, related channel parameters are predicted, a channel knowledge map in the current environment is generated, and proper values are set to visualize the channel knowledge map. According to the method, the fitting capability of the neural network to the nonlinear relationship is used for calculating the interaction effect of the ray and the environment, the electromagnetic property of the material in an actual scene can be better predicted, and the method has excellent migration capability.

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.

The invention provides a cast-in-place pile quality online monitoring method and system based on an ultrasonic array, and the method comprises the steps: transmitting and receiving ultrasonic waves through the ultrasonic array arranged in a cast-in-place pile, and obtaining a multi-channel sound wave signal; performing generalized S transformation processing on the multichannel sound wave signals to obtain a time-frequency matrix, and calculating a cross correlation coefficient between each channel signal and the defect-free reference signal; an amplitude matrix and an instantaneous phase gradient matrix are calculated based on the time-frequency matrix, neighborhood amplitude energy and a phase consistency factor are fused in a time-frequency domain, and a defect energy indication diagram of the pile body section is generated; calculating the energy entropy of the defect energy indication diagram in a full frequency band; and extracting an actually measured energy arrival time sequence, comparing the actually measured energy arrival time sequence with a theoretical arrival time sequence to construct a space distortion vector, and setting a threshold value by combining energy entropy to judge defects.

A first device includes one or more processors configured to determine a frequency of channel sounding based at least on a movement characteristic of the first device. The one or more processors can generate a first frame requesting a second device in a wireless local area network (WLAN) to perform channel sounding with the first device using the determined frequency of channel sounding. The one or more processors can wirelessly transmit, via a transceiver, the generated first frame to the second device.

The invention discloses an acoustic monitoring method, system, medium and equipment for the near stall condition of an aircraft compressor, and the method comprises the steps: carrying out the synchronous collection of sound pressure time domain signals of multiple channels of an aviation compression system; adding a rectangular window to the multi-channel sound pressure time-domain signal, and constructing an acoustic time-domain signal segment to monitor the current operation state of the aviation compression system; performing fast Fourier transform on the multichannel acoustic time domain signal segment in the current time domain window to form a plurality of sound pressure frequency spectrums, judging whether a plurality of single-tone characteristic frequencies which are non-integer multiples of the current rotation frequency exist in the sound pressure frequency spectrums or not, and constructing an orthogonal Fourier transfer matrix based on the installation position and the highest circumferential modal order, and judging whether the order difference of the characteristic acoustic mode under each characteristic frequency is the rotation frequency multiple difference of the corresponding characteristic frequency, calculating the acoustic mode amplitude corresponding to each broadband frequency component, drawing an acoustic mode spectrogram, and judging whether a mode bright band exists at the cut-off frequency boundary in the acoustic mode spectrogram.

The invention provides a channel state information determination method and device, and relates to the technical field of wireless communication. The channel state information determination method applied to the network equipment comprises the step of sending first indication information and second indication information to terminal equipment. And receiving the DMRS from the terminal equipment. And determining channel state information according to the DMRS. The first indication information is used for indicating N channel sounding reference signal (SRS) precoding. And the N SRS pre-codes are in one-to-one correspondence with the N SRS ports. The second indication information is used for indicating M demodulation reference signal (DMRS) pre-codes, the M DMRS pre-codes are in one-to-one correspondence with the M DMRS ports, any one DMRS pre-code in the M DMRS pre-codes comprises weighted summation of K SRS pre-codes, and the K SRS pre-codes belong to N SRS pre-codes. K is an integer larger than zero and smaller than or equal to N, and N is a positive integer. According to the channel state information determination method and device provided by the invention, the problems of channel CSI aging and the like caused by relatively long SRS channel estimation period can be relieved, and the wireless communication efficiency is improved.

This disclosure provides methods, components, devices and systems for interference reduction between wireless communication devices of overlapping basic service sets (OBSSs). Some aspects more specifically relate to signaling mechanisms associated with an OBSS channel sounding operation and power control mechanisms associated with OBSS interference mitigation, either or both of which a first access point (AP) associated with a first basic service set (BSS) may leverage as part of a coordinated beamforming scheme with a second AP associated with a second BSS. In accordance with OBSS channel sounding, the first AP may associate a set of sounding packets with one or more parameters indicative of the second BSS such that the sounding packets appear, to OBSS stations (STAs), as in-BSS sounding packets. Additionally, or alternatively, the first AP may employ a power control mechanism according to which the first AP may apply portion-by-portion transmission power control.

The embodiment of the invention provides a radio frequency processing circuit, a signal processing method and radio frequency processing equipment, which are applied to the technical field of communication. The radio frequency processing circuit comprises a radio frequency channel, a plurality of power dividers and a channel detection channel. And the combining ends of the plurality of power dividers are correspondingly coupled with the plurality of antenna array elements. The first branching ends of the plurality of power dividers are coupled with the input end of the radio frequency channel. And the second branching ends of the plurality of power dividers are coupled with the input end of the channel detection channel. The plurality of power dividers are used for acquiring a plurality of corresponding radio frequency signals from the plurality of antenna array elements, and performing branching processing on the plurality of radio frequency signals to obtain a plurality of first radio frequency data signals and a plurality of radio frequency reference signals. The radio frequency channel is used for inputting a plurality of first radio frequency data signals. The channel detection channel is used for inputting a plurality of radio frequency reference signals. The plurality of radio frequency reference signals are used for obtaining antenna array element level channel information. According to the embodiment of the invention, the wave beam round robin time during full-airspace coverage can be reduced, and the performance loss of a network system is reduced.

The present application relates to an audio processing method, device, headset and computer-readable storage medium, which first obtains a multi-channel sound signal recorded by a microphone array of the headset, then performs sound source separation on the multi-channel sound signal based on a preset category, determines the target sound source of the preset category, determines different categories based on the multi-channel sound signal based on the orientation information of the wearer, and obtains spatial audio according to the orientation information of the target sound source and the target sound source corresponding to the preset category. Thus, the user can hear the real sound transmitted from different directions by different categories of sound sources through the headset, with a high degree of restoration of the real world and high quality of spatial audio, which is conducive to users to better avoid risks based on spatial audio and improves the reliability of the headset.

The invention discloses a robot dog monitoring system for bird sound source positioning and tracking, and the system comprises a sound collection module which is used for collecting a multi-channel sound signal, and carrying out the preprocessing of the multi-channel sound signal; the edge calculation module is used for processing based on the preprocessed multi-channel sound signals to obtain a sound source positioning result; the robot dog motion control module is used for receiving the sound source positioning result, performing path planning in combination with a control algorithm, driving a robot dog to autonomously move to approach a sound source, and integrating a sound source array sensor to realize environment perception and navigation; the image recognition module is used for constructing a bird recognition model and deploying the bird recognition model in an image recognition sensor to obtain a bird recognition result; and the remote monitoring module is used for receiving and displaying the sound source positioning result, the motion trail of the robot dog and the bird recognition result in real time. According to the invention, an efficient and intelligent solution is provided for bird monitoring.

The invention provides a communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first information sent by a network device, the first information being used for triggering receiving or sending of a target signal, the target signal comprising one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network equipment in an uplink random access process; or the first information is sent by the network equipment in the process that the auxiliary cell is activated or quits the dormant state. The first information used for triggering the uplink reference signal, the downlink reference signal or the CSI is transmitted in advance to an uplink random access process, an auxiliary cell activation process or an auxiliary cell quit a dormant state, so that the signals are transmitted as early as possible, the transmission delay of the signals is reduced, and the transmission efficiency is improved. And the time delay from the state switching of the terminal equipment to the channel detection is shortened, so that the network decision is facilitated.

The invention discloses a key generation method based on space filling curve mapping and nonlinear correlation matching, and relates to the technical field of physical layer security. According to the method, the key is generated by adopting the steps of channel detection and synchronous ciphertext transmission, distribution transformation of an acquired channel sample sequence, index mapping based on a space filling curve, segmented random nonlinear transformation and replacement, segmented matching based on nonlinear correlation measurement and the like; according to the channel detection and synchronous ciphertext transmission, a terminal exchanges a detection packet to collect a channel sample sequence, and encrypted data is synchronously transmitted to improve the communication efficiency; the distribution transformation is used for converting a normally-distributed channel sample sequence into a uniformly-distributed two-dimensional channel sample sequence, so that the distribution of channel samples is more dispersed, and more uniform index mapping is conveniently generated subsequently; segmented matching is carried out by measuring the nonlinear correlation among the index segments, so that the matching robustness is enhanced, and the key generation accuracy and generation rate are improved.

The invention, which relates to the technical field of audio experience, discloses an immersive audio experience-oriented sound sound field orientation system comprising a position sensing module, a sound field modeling module, a characteristic sound wave generation module, an array control module and a space feedback adjustment module. The position and orientation information of a target user in a three-dimensional space is obtained in real time through a non-contact sensor, a real-time acoustic propagation model containing reflection surface distribution and material characteristics is constructed, a multi-channel acoustic signal is generated based on the model, a loudspeaker array is driven to produce sound through a beam control parameter set, and the sound transmission effect is achieved. According to the invention, the spatial focusing of the sound beam in the target direction is realized, the sound production delay and phase difference of each loudspeaker unit are dynamically adjusted based on the direction deviation information of the received sound pressure, and a closed-loop control path is formed. The method is suitable for various scenes such as virtual reality, intelligent cinemas and voice interaction.