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73 results about "Doppler measurements" patented technology
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Astronomers use the Doppler effect to measure the frequency of light waves as an object is moving with respect to the observer. The frequency is shorter as it moves toward you, and the object shows a blueshift.
Machine learning in GNSS receivers for improved velocity outputs
ActiveUS12306312B2Satellite radio beaconingNeural learning methodsDoppler measurementsRemote sensing
Machine learning techniques are used to compute predicted range rate errors in a GNSS receiver. In one embodiment, training data is computed to provide true range rate error data for a set of received GNSS signals. A system extracts features from the set of received GNSS signals and uses the extracted features and the true range rate error data to train a model (e.g., a set of one or more neural networks) that can produce predicted range rate errors for use in correcting measurements. The trained set of one or more neural networks can be deployed in GNSS receivers and used in the GNSS receivers to correct Doppler measurements using the predicted range rate errors provided by the trained set of one or more neural networks.
Owner:ONENAV INC
3D Vision Aided GNSS Real-time Kinematic Positioning for Autonomous Systems in Urban Canyons
In estimating a position of a vehicle utilizing a global navigation satellite system (GNSS), it is desirable to exclude outliner GNSS measurements due to navigation signals via non-light-of-sight paths from the GNSS to the vehicle, but it leads to a distorted satellite geometry distribution. Complementariness between low-lying visual landmarks and healthy but high-elevation satellite measurements is explored to improve the geometry constraint. Measurements of an inertial measurement unit, low-lying visual landmarks captured by a forward-looking camera onboard the vehicle, and healthy but high-elevation satellite measurements are tightly-coupled integrated via sliding window optimization of system states used in a factor graph. To improve estimation performance, good initial guesses of system states are important. As such, initial guesses of velocity set and position set inside a sliding window are estimated simultaneously based on data of Doppler measurement, double-differenced (DD) pseudorange measurement and DD carrier-phase measurement as obtained in GNSS measurements.
Owner:THE HONG KONG POLYTECHNIC UNIV
Sensing beam management
PendingUS20250175240A1Spatial transmit diversityTransmission monitoringSoftware engineeringMechanical engineering
A method for CLI signal measurement includes: receiving, at an apparatus, a CLI configuration indicative of an uplink CLI signal corresponding to a transmitting user equipment; receiving, at the apparatus, the uplink CLI signal; measuring, at the apparatus, the uplink CLI signal to determine a Doppler measurement; and measuring, at the apparatus, the uplink CLI signal to determine a received power of the uplink CLI signal.
Owner:QUALCOMM INC
Sensing beam determination for target zone coverage
PendingUS20250202568A1Spatial transmit diversityTransmission monitoringTelecommunicationsDoppler measurements
Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a network entity may receive, from a network device, Reference Signal Received Power (RSRP) measurements and Doppler measurements for a plurality of pairs of sensing beams. The network entity may determine, based on at least a portion of the RSRP measurements and the Doppler measurements, a pair of sensing beams from the plurality of pairs of sensing beams for sensing a target. In some cases, the network device may determine the RSRP measurements and Doppler measurements of the plurality of pairs of sensing beams. The network device may receive, from the network entity, an indication of a pair of sensing beams from the plurality of pairs of sensing beams based on at least the portion of the RSRP measurements and the Doppler measurements.
Owner:QUALCOMM INC
Channel state information processing unit counting
PendingUS20250167851A1Spatial transmit diversitySynchronisation arrangementChannel state informationTelecommunications
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain a channel state information (CSI) report that is associated with a multi-symbol downlink reference signal and that indicates a report quantity associated with a Doppler shift measurement, a per-path Doppler measurement, or a per-beam-per-path Doppler measurement. The UE may count a number of CSI processing units (CPU's) for processing the CSI report based at least in part on the report quantity. Numerous other aspects are described.
Owner:QUALCOMM INC
Positioning method based on low earth orbit satellite opportunity signal Doppler measurement
The invention belongs to the technical field of wireless communication, and particularly relates to a positioning method based on low-orbit satellite opportunity signal Doppler measurement. The method solves the Doppler measurement positioning problem based on low orbit (LEO) satellite opportunity signals under the condition that GNSS signals are limited or unavailable. A positioning process is modeled as a non-linear state space framework, a joint estimation scheme combining a cubic Kalman smoother and an expectation maximization algorithm is provided, efficient estimation of a terminal position and Doppler frequency shift is realized, and noise covariance is adaptively optimized at the same time. The method provided by the invention theoretically ensures the optimal performance in statistical significance. A simulation result shows that compared with a traditional nonlinear least square method, the scheme provided by the invention can remarkably improve the positioning precision, and the calculation overhead is kept reasonable and balanced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Fusion positioning algorithm based on low-orbit satellite Doppler measurement, DME and VOR
The application discloses a fusion positioning algorithm based on low-orbit satellite Doppler measurement, DME and VOR, relates to the technical field of satellite navigation, and comprises the following steps: acquiring the Doppler frequency shift of a low-orbit satellite, the slant range information of a DME and the azimuth angle data of a VOR, constructing a combined observation equation, and obtaining a corresponding Jacobian matrix; based on a geometric dilution of precision, selecting stations and stars through a genetic algorithm, optimizing the selection of the DME, the VOR and the low-orbit satellite, and obtaining an optimal navigation source combination; constructing a motion model under different flight modes, and dynamically estimating the state of an aircraft by using an interactive multiple model Kalman filter, and updating the position information in real time. Therefore, the real-time positioning of the aircraft under complex conditions is realized, the anti-interference capability of the system is improved, and the overall positioning precision and stability of the system are improved.
Owner:BEIHANG UNIV
Method, system and computer program for estimating target range and / or radial velocity
The present disclosure relates to methods and systems based on a new type of radar waveform, taking the form of a continuous aperiodic signal, effectively indistinguishable from white noise, though actually it is a signal allowing both accurate and ambiguity free range and radial velocity, i.e. Doppler, measurements.
Owner:HELLSTEN HANS
Communication method and communication device
According to the communication method provided by the invention, resources used by each antenna port group in each measurement are indicated or predefined by a protocol through resource configuration information, so that K resources used by each measurement in M channel state measurements for forming K antenna port groups can be determined according to the resource configuration information. Furthermore, K * M resources for performing M times of channel state measurement on the K antenna port groups can be determined, namely, the resources used by the K antenna port groups in each time of channel state measurement in Doppler measurement are determined, so that M times of channel state measurement is performed on the K antenna port groups. Besides, the terminal equipment can also determine the shortest time in K * Z'ref or the preset longest time Zmax from the end of the measurement of the K antenna port groups to the start of reporting the CSI report, thereby not only perfecting a resource configuration scheme for the AP CSI-RS Doppler measurement of a larger port, but also determining the time from the end of the measurement of the large port to the start of reporting the CSI report.
Owner:HUAWEI TECH CO LTD
Device and method for measuring deep space ultra-long distance
PendingCN120103355ADesign optimisation/simulationElectromagnetic wave reradiationFar distanceData set
The invention discloses a deep space ultra-long distance measuring device and method, and the method comprises the following steps: constructing a simulation scene and a data set, and preparing a related parameter set; establishing a measurement system and acquiring data, and defining hardware and equipment requirements; processing a frequency difference sequence correlation problem to obtain data necessary for incoherent Doppler measurement; carrying out orbit calculation and measurement result evaluation, error measurement and precision evaluation; according to the measurement method, through a series of operations such as construction of a simulation scene and a data set based on an improved incoherent Doppler measurement model, establishment of a measurement system, processing of a frequency difference sequence and orbit calculation and evaluation, many technical problems in deep space ultra-long distance measurement are solved, the orbit measurement precision is improved, and the measurement efficiency is improved. Especially in complex deep space environments such as solar system boundary detection, challenges such as weak signals and many interference factors are effectively handled, and the accuracy and reliability of measurement are ensured.
Owner:WUHAN UNIV
Ocean flow field measurement method and device
ActiveCN120926957AMeasuring open water movementIndication/recording movementLyapunov exponentFrequency shift
The invention relates to the technical field of flow field measurement, in particular to an ocean flow field measurement method and device, and provides the following scheme: the method comprises the following steps: collecting ocean environment parameters through a vertical sensor, determining an overlook angle of an inclination sensor based on an optimization algorithm, and generating a virtual Doppler measurement array through micro-amplitude scanning; inputting to a chaotic oscillator network to identify a Lyapunov exponent maximum direction, and determining a horizontal included angle of a second inclination sensor; furthermore, a frequency shift signal is collected, and the flow velocity and the flow direction are calculated by combining adjusting parameters, so that high-precision and high-adaptability flow field measurement is realized; the method has a dynamic response capability, and is suitable for direction structure identification and real-time flow direction calculation under complex sea conditions.
Owner:NANJING HYDRAULIC RES INST +2
Per path doppler reporting based on tracking reference signal
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, a Doppler measurement report configuration. The UE may receive, from the network entity, a tracking reference signal (TRS). The UE may transmit, to the network entity, a Doppler measurement report in accordance with the Doppler measurement report configuration, wherein the Doppler measurement report indicates per path or per path-group Doppler frequency and Doppler frequency power measurements performed on the TRS, for one or more paths or path-groups. Numerous other aspects are described.
Owner:QUALCOMM INC
Doppler measurement method and apparatus, and communication device
A Doppler measurement method and apparatus, and a communication device, are provided. The Doppler measurement method includes: A first device obtains first information and second information. The first device obtains target information based on the first information and the second information. The first information is Doppler frequency shift information obtained by a third device by measuring a first signal sent by a second device. The second information is Doppler frequency shift information obtained by the second device by measuring a second signal sent by the third device. The target information is used for indicating Doppler frequency shift information between the second device and the third device. The Doppler frequency shift information is Doppler frequency shift information associated with motion of a sensing target in a channel.
Owner:VIVO MOBILE COMM CO LTD
Profiling and signaling for clutter doppler characteristics in RF sensing
PCT designated stage expiredWO2025122282A1Receivers monitoringParticular environment based servicesNetwork communicationRadio frequency
In some implementations, a configuring device may send, to a sensing node set comprising one or more sensing nodes communicatively coupled with a wireless network, a sensing configuration, wherein the sensing configuration is configured to enable the sensing node set to perform a radio frequency (RF) sensing procedure and obtain clutter Doppler measurement information of the geographical area based at least in part on the RF sensing procedure. The configuring device may receive, from the sensing node set the clutter Doppler measurement information. The configuring device may determine a profile of the clutter Doppler characteristics of the geographical area based at least in part on the clutter Doppler measurement information.
Owner:QUALCOMM INC
Opportunistic reference signal processing
PCT designated stageWO2025250273A1Position fixationPilot signal allocationTelecommunicationsDoppler velocity
A method of processing reference signals at an apparatus includes: obtaining, at the apparatus, a reference signal (RS) configuration corresponding to a set of pilots to be transmitted on a set of resource elements in at least one RS repetition of an allocated RS; and selectively processing, at the apparatus, only a subset of the set of resource elements, to process fewer than all resource elements of the set of resource elements, based on at least one Doppler / velocity RS measurement consideration corresponding to at least one of a Doppler RS measurement or a velocity RS measurement.
Owner:QUALCOMM INC
Measurement method of turbulent flow space statistics
PendingCN122042200AHydrodynamic testingFluid speed measurementCovariance methodMeasurement precision
The invention provides a turbulent flow space statistical magnitude measuring method, which comprises the following steps of: acquiring a sampling signal for laser Doppler velocity measurement, processing, setting filtering and pre-signal amplification coefficient parameters, carrying out data enveloping and modulation, checking a calculation result, filtering again if the calculation result is unqualified after the calculation result is checked, and if the calculation result is not qualified after the calculation result is checked, judging whether the calculation result is qualified or not. If the inspection is qualified, outputting a result; determining a laser Doppler measurement volume diameter corresponding to the low-intensity steady turbulence by applying a Taylor freezing hypothesis, and performing Fourier transform by adopting a time slot auto-covariance method to draw a turbulence space kinetic energy spectrum density curve; second-order and third-order structure function curves of a turbulent space are drawn based on a convection recording method and a time slot auto-covariance method to be verified respectively, a turbulent average dissipation value is calculated according to the initial slope of a third-order structure function of the turbulent space, and then the dissipation scale is calculated according to the energy dissipation rate of fluid and the kinematic viscosity coefficient of the fluid. According to the measurement method, the measurement precision of the turbulence space is improved.
Owner:ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
Method for measuring flow velocity of molten metal
PendingCN120522715AVirtual/augmented realitySensing heat from liquidsMechanical engineeringDoppler measurements
The invention discloses a method for measuring the flow velocity of molten metal, which comprises the following steps of: checking various devices during preparation before measurement, preheating, self-checking, adjusting parameters and installing a high-temperature-resistant protection structure; multi-technology measurement including laser Doppler measurement, infrared thermal imaging measurement, sound wave assisted multi-dimensional flow velocity measurement, quantum sensing high-precision measurement and multi-spectral imaging flow characteristic analysis is adopted, and in the data processing and analysis stage, a data processing unit receives all information and calculates and corrects the flow velocity through multiple algorithms. A virtual simulation construction model based on digital twinning simulates an actual state and performs simulation verification, and data or an algorithm is adjusted to ensure accuracy. And finally displaying and recording a result. According to the method, multiple technologies are combined and complemented with one another, the accuracy is improved through multi-algorithm correction, a digital twinning verification result is obtained, a non-contact measurement mode is adopted, the method adapts to a high-temperature environment, and the measurement precision, reliability and applicability are improved.
Owner:BEIJING FISHERMETER TECH DEV CO LTD
Measurements for sensing in a wireless network
PCT designated stageWO2026053193A1Position fixationRadio wave reradiation/reflectionTelecommunicationsDoppler measurements
Various aspects of the present disclosure relate to measurements for sensing in a wireless network. An apparatus, such as a device implementing a measurement entity, receives first signaling including at least one configuration parameter corresponding to a set of doppler measurements associated with sensing one or more targets. The device receives second signaling including one or more reference signals associated with sensing the one or more targets. The device transmits, based on the at least one configuration parameter and the one or more reference signals, third signaling including sensing information of the one or more targets, where the sensing information is based on the set of doppler measurements.
Owner:LENOVO UNITED STATES INC
Adaptive resource allocation for micro-doppler sensing based on user equipment feedback
PCT designated stageWO2025184838A1Modulated-carrier systemsTransmission path divisionTelecommunicationsResource assignment
Disclosed are techniques for wireless communication. In an aspect, a receiver sensing node receives a first activation of a first configuration of a sensing reference signal for micro-Doppler measurement, obtains one or more first micro-Doppler measurements of the sensing reference signal based on the first configuration, receives a second activation of a second configuration of the sensing reference signal for micro-Doppler measurement based at least in part on one or more confidence levels associated with one or more parameters of the one or more first micro-Doppler measurements indicating that the one or more parameters of the one or more first micro-Doppler measurements were not detected, and obtains one or more second micro-Doppler measurements of the sensing reference signal based on the second configuration.
Owner:QUALCOMM INC +4
Micro-doppler measurements reporting in mobile radio networks
PCT designated stage expiredWO2025157394A1Radio wave reradiation/reflectionAccess networkRadio access network
The present disclosure relates to measurements and sensing in radio access networks. The disclosure provides a measurement entity, configured to: obtain measurement information based on one or more sensing signals; and report the measurement information to a sensing entity, wherein the measurement information comprises one or more micro-Doppler signatures and / or one or more micro-Doppler signature related features. This disclosure further provides a sensing entity, configured to: obtain measurement information from at least one measurement entity, wherein the measurement information comprises one or more micro-Doppler signatures and / or one or more micro-Doppler signature related features; and extract sensing information related to one or more detected objects based on the obtained measurement information.
Owner:HUAWEI TECH CO LTD +1
An adaptive track initiation method based on GLMB
ActiveCN116520311BComplex mathematical operationsRadio wave reradiation/reflectionMulti target trackingEngineering
The present invention belongs to the technical field of multi-target tracking, and specifically relates to an adaptive track initiation method based on GLMB. The present invention traverses all possible tracks based on measurement data at two consecutive moments, and preliminarily screens the measurement data to remove most clutter using speed screening rules and Doppler information screening rules. The target measurement probability is calculated based on the posterior probability to distinguish the measurement source. The target measurement probability can be used to distinguish whether the measurement originates from a new target or a surviving target. The speed information implicit in the Doppler measurement is used to calculate the initial operating state of the new target and enter the next prediction process, thereby completing the track initiation function.
Owner:HARBIN ENG UNIV
Integrated navigation precision improvement method based on fused hydrological information
ActiveCN122041867ANavigational calculation instrumentsNavigation by speed/acceleration measurementsHydrometryBeam angle
The invention relates to an integrated navigation precision improvement method based on fused hydrological information, which belongs to the technical field of inertial navigation, and comprises the following steps: S1, based on hydrological information of a target navigation sea area, calculating to obtain a sound velocity profile of the target navigation sea area and wave beam angles of each water layer of the target navigation sea area; s2, based on the sound velocity profile of the target navigation sea area and each water layer beam angle, obtaining a corrected Doppler measurement speed; s3, compensating the corrected Doppler measurement speed based on the beam incident angle after equivalent refraction to obtain a compensated Doppler measurement speed; and S4, fusing the compensated Doppler measurement speed with the inertial navigation speed to obtain a corrected navigation calculation result of the ship or the underwater vehicle. According to the invention, the hydrological environment data and the inertial navigation data are fused, so that the position precision and reliability of the ship or the underwater vehicle during long-time autonomous navigation are greatly improved.
Owner:ZHEJIANG UNIV
Using doppler for multipath detection and mitigation in RF-based positioning
Aspects presented herein may improve the performance and accuracy of RF-based positioning. Aspects presented herein may enable a device to use RF Doppler measurements to detect and mitigate multipath effects in RF-based positioning. The RF-based positioning may include satellite navigation, terrestrial positioning system, and / or indoor positioning. In one aspect, a UE receives, via a receiver, signals from one or more entities. The UE determines whether each received signal is a multipath signal based on a Doppler shift measurement. The UE de-weights or excludes one or more signals of the received signals in estimating a position of the UE based on whether the respective received signal is determined to be a multipath signal.
Owner:QUALCOMM INC
Communication method, communication device, and computer-readable storage medium
The application discloses a communication method, a communication device and a computer readable storage medium. The application is applied to a wireless local area network system supporting IEEE 802.11ax next generation Wi-Fi protocol, such as 802.11be, 802.15.4z, 802.15.4ab, Wi-Fi7 or EHT, for example, 802.11be next generation, Wi-Fi8 or 802.11 series protocol, and can also be applied to a wireless personal area network system based on ultra-wideband (UWB), a sensing system. The method comprises: generating a transmission signal, a peak value of a first sidelobe of the transmission signal belonging to a first peak value range; and transmitting the transmission signal, the transmission signal being used for ranging, angle measurement or Doppler measurement. In the embodiment of the application, the peak value of the first sidelobe of the transmission signal belongs to the first peak value range, so that the influence of the direct diameter of the transmission signal on the non-direct diameter can be reduced.
Owner:HUAWEI TECH CO LTD
Ultrasonic diagnostic apparatus
PendingCN120168000ABlood flow measurement devicesInfrasonic diagnosticsInformation processingRadiology
The purpose of the present invention is to provide an ultrasonic diagnostic device that reduces the number of times ultrasonic pulses are transmitted during Doppler measurement while suppressing unnecessary components included in information obtained by Doppler measurement. An information processing unit (26) is provided with: a Doppler measurement unit (40) that generates Doppler measurement information on the basis of a received Doppler signal output from a wall filter (38); and the machine learning model (44) is constructed according to the training information and the target information. The training information is information obtained from K received Doppler signals. The target information is information obtained from J reception Doppler signals for the same object to be measured as when obtained from K reception Doppler signals. Here, J and K are integers of 2 or more, and J is greater than K. A machine learning model (44) generates Doppler measurement information from the input information. The input information is information generated from K reception Doppler signals for an object to be measured in a subject (18).
Owner:FUJIFILM CORP
Communication method and communication apparatus
PCT designated stageWO2025218528A1Payload allocationWireless communicationTerminal equipmentDoppler measurements
Owner:HUAWEI TECH CO LTD
A multi-radar sequential fusion target tracking method based on adaptive information feedback
ActiveCN117075096BImprove acceleration performanceComplex mathematical operationsRadio wave reradiation/reflectionPattern recognitionRadar
This invention belongs to the field of target tracking technology based on the fusion of multiple phased array radar data, and specifically relates to a target tracking system and method that utilizes Doppler measurement information for sequential filtering and fusion. A multi-radar sequential fusion target tracking method (SQ-AFSF) based on adaptive information feedback is proposed. In this algorithm, the DMM-LSF filtering algorithm is used, with the estimated result of the sequentially fused position filtering as the input for the sequential filtering. The filtering results of the sequential filtering are further sequentially fused to obtain the estimated result after sequential filtering. Finally, adaptive information feedback is performed according to the corresponding scenario to obtain the final target state estimation result.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Techniques for updating an artificial intelligence or machine learning model for object recognition
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may transmit an indication of micro-Doppler measurements associated with a first artificial intelligence or machine learning (AI / ML) model. The wireless communication device may receive, in association with transmitting the indication of the micro-Doppler measurements, an indication of a second AI / ML model that is an update of the first AI / ML model. The wireless communication device may transmit, in connection with using the second AI / ML model, an indication associated with object recognition. Numerous other aspects are described.
Owner:QUALCOMM INC
High-speed blood flow doppler measurement method and system for miniaturized ultrasound catheter probes
This invention discloses a high-speed blood flow Doppler measurement method and system for miniaturized ultrasound catheter probes. It employs a high-pulse repetition frequency complementary Golay-coded pulse sequence to replace continuous wave transmission, achieving a distance-dimensional information-discarding equivalent CW effect through extremely high PRF combined with range-gate coherent summation. Pulse compression processing gain is obtained through Golay BPSK encoding excitation. A pulse-by-pulse A / B alternating transmission strategy is used, with each physical pulse independently extracting Doppler samples using a matched filter corresponding to the codeword. Time-division multiplexing of pulse modes enables full-aperture transmission and reception, eliminating TX-RX acoustic leakage. This invention achieves a comprehensive signal-to-noise ratio gain of approximately 31 dB without exceeding the thermal load of traditional CW, restoring clinically usable CW equivalent Doppler spectra on ICE catheters, and can be implemented through firmware upgrades on existing PW Doppler hardware.
Owner:SHANGHAI BOWEISHENG TECHNOLOGY CO LTD
Device and method for sensing node calibration
The present invention discloses integrated sensing and communications (ISAC). A mechanism for calibrating sensing nodes in a mobile radio network is provided. A sensing transmitter transmits one or more reference signal sets, each set comprising at least two reference signals transmitted using a common spatial filter within a configured time period. A sensing receiver receives the one or more reference signal sets and performs sensing calibration, such as estimating path parameters based on the one or more reference signal sets to compensate for timing and / or frequency offsets. The present invention achieves bias-free delay and Doppler measurements, improved sensing accuracy, and scalable deployment in multi-node ISAC systems, addressing challenges in synchronization for multi-node sensing in next-generation wireless networks.
Owner:HUAWEI TECH CO LTD