507results about "Beacon systems using radio waves" patented technology

The invention provides an RFID trajectory tracking system based on least square speed adaptation, and the method comprises the steps: firstly building a half-wavelength observation distance expansion model, and effectively solving the problem of error divergence caused by a conventional phase unwrapping scheme; then, generating an initial position candidate set by using a triangular centroid weighting algorithm, performing instantaneous speed estimation by using a least square algorithm, and introducing a dynamic threshold-weight constraint mechanism to obtain a high-quality initial state set; thirdly, speed estimation based on least square is fused in the EKF, speed data are updated through the least square method before each round of antenna scheduling is started, target tracking trajectories estimated based on different initial positions are obtained, and the problem that in the target tracking process, the speed suddenly changes or the tracking error is large during steering is solved; and finally, dynamically deleting the tracking trajectory with the zero weight, and selecting the trajectory with the maximum weight value as the final tracking trajectory of the target, thereby effectively reducing the calculation complexity of the algorithm. The invention provides an RFID trajectory tracking system which is convenient and simple to deploy, can realize trajectory tracking of a target tag, and is suitable for most indoor positioning scenes.

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.

The invention provides an unmanned aerial vehicle positioning method and system based on a wireless positioning beacon and a program product, and relates to the technical field of unmanned aerial vehicle positioning, and the unmanned aerial vehicle positioning method comprises the steps: obtaining the first position information of the wireless positioning beacon, the second position information of an unmanned aerial vehicle, and the measurement distance information between the wireless positioning beacon and the unmanned aerial vehicle; determining a relative error vector of the unmanned aerial vehicle relative to the wireless positioning beacon based on the measurement distance information, the first position information and the second position information; and determining relative position information between the unmanned aerial vehicle and the wireless positioning beacon based on the relative error vector.

A controller for a working vehicle is configured or programmed to, when an attachment is attached to a hitch, if the controller succeeds in selecting one of one or more pieces of identification information that is included in one of one or more wireless signals transmitted from one or more transmitters in or on one or more attachments and received by a receiver according to a predetermined condition, perform a predetermined process based on the selected piece of identification information, and if the controller fails to select any of the one or more pieces of identification information, select, according to a predetermined condition, one of the one or more pieces of identification information that is included in one of the one or more wireless signals received by the receiver when the working vehicle takes action and perform the predetermined process based on the selected piece of identification information.

Co-channel beacon transmissions are provided with at least one of spectral redundancy and temporal redundancy. A receiver produces a snapshot of a superposition of received co-channel beacon transmissions. Subcarrier demodulation, code nulling, or a Class-C linear minimum-mean-square error (MMSE) operation separates multiples ones of the co-channel beacon transmissions or eliminates inter-symbol interference and inter-subcarrier interference in the snapshot. Receiver operations can be performed at a network user, a network node, or a network operations center.

A beacon-based approach guidance system is disclosed. A disclosed method includes digitizing at least one signal received at an antenna array of a receiver of a vehicle to digitized data streams of I and Q samples, the at least one signal received from a beacon, the at least one signal modulated with a pseudorandom code at the beacon, correlating the I and Q samples to a locally generated pseudorandom code of the receiver to recover carrier signals, and calculating, based on relative phase characteristics of the recovered carrier signals, a direction of arrival of the at least one signal from the beacon in a vehicle reference frame.

Implementations described herein provide systems, methods, and devices for vehicle occupant detection based on wireless transmission(s) from one or more wireless transmitter devices (e.g., beacons) located in the vehicle. The wireless transmitter devices can be standalone devices, such as portable low energy beacons, and / or the wireless transmitter devices can be integrated into other components of the vehicle, such as an on-board dash computer or a door handle. The systems disclosed herein receive the wireless transmission and determine transmission metrics associated with the transmission, such as a signal strength value or a transmission angle. A driver status determination and / or a passenger status determination is based on the transmission metrics. A data file converter generates a driver status data file representing the driver status determination and / or the passenger status determination. The driver status data file is sent to an application for which the driver status data file is configured.

A mobile device and base station are enabled to support improved positioning accuracy in the presence of phase noise in high frequency radio network, such as in 5G New Radio network operating in mm Wave. Phase Tracking Reference Signal (PTRS) may be transmitted with Positioning Reference Signals (PRS) and used for positioning and / or used to correct the phase offset between symbols in the PRS (1302). A request may be made to transmit PTRS alone or with the PRS, or that the PRS is transmitted with a specific PRS frame structure, e.g., with a specific comb value, that minimizes the impact of phase noise. The PTRS or a phase ramp of the staggered symbols in the PRS may be used to estimate and correct the phase offset (1304, 1306).

Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A network device determines information of a repeater device and an indication indicating whether the repeater device is used for communication between the network device and a terminal device, and transmits the information of the repeater device and the indication to a positioning device for positioning the terminal device. In this way, positioning accuracy may be improved.

A method for reporting positioning measurement information, a terminal, and a network device are provided. The method includes: receiving first configuration information from a network device; and reporting a measurement result of a beam group based on the first configuration information, where the beam group is used to transmit a positioning reference signal PRS, and the beam group includes N beams determined by reference signal received power RSRP or time of arrival TOA, where N is a positive integer, the N beams are beams in a first cell, and the first cell is one of cells participating in positioning.

An apparatus for a wireless communication system is provided. The apparatus is to transmit a reference signal on a common set of resource elements (REs), the common set of resource elements being used by one or more further apparatuses in the wireless communication system, so that the reference signal of the apparatus and one or more further reference signals of the one or more further apparatuses use the same resource elements. Moreover, the apparatus is to transmit the reference signal depending on a base sequence or a sequence derived from the base sequence and depending on a set of configuration parameters.

The invention provides an unmanned aerial vehicle positioning method and system based on a wireless positioning beacon and a program product, and relates to the technical field of unmanned aerial vehicle positioning, and the unmanned aerial vehicle positioning method comprises the steps: obtaining the first position information of the wireless positioning beacon, the second position information of an unmanned aerial vehicle, and the measurement azimuth angle information of the unmanned aerial vehicle relative to the wireless positioning beacon; based on the first position information and the second position information, calculating azimuth angle information of the unmanned aerial vehicle relative to the wireless positioning beacon is determined; determining corrected azimuth angle information of the unmanned aerial vehicle relative to the wireless positioning beacon based on the measured azimuth angle information and the calculated azimuth angle information; and determining relative position information between the unmanned aerial vehicle and the wireless positioning beacon based on the corrected azimuth angle information.

The invention pertains to a method for continuously determining a position of one or more moving vehicles of a fleet of vehicles, the fleet of vehicles including a primary vehicle (10) and one or more subordinate vehicles (11), the primary vehicle being equipped with a reference positioning system comprising one or more components - e.g., GNSS antennas - (51, 52), the reference positioning system providing reference position information regarding a position in a reference coordinate system, the method comprising: providing an anchor module (2) at the primary vehicle, comprising at least three radio-frequency sensors (21, 22, 23) that are positioned on the primary vehicle with a known spatial relationship to one another and to the one or more components, each of the radio-frequency sensors being configured to emit and receive radio signals; providing a tag module (3) on each of the subordinate vehicles (11), each tag module being configured to emit and receive radio signals; and at least a first ranging process for continuously determining the position of a first subordinate vehicle, wherein the first ranging process comprises: determining a position of the radio-frequency sensors in the reference coordinate system; exchanging a set of radio signals between a first tag module on the first subordinate vehicle and each of the radio-frequency sensors; calculating a time of flight of each set of radio signals; calculating a distance (d1, d2, d3) between the first tag module and each of the respective radio-frequency sensors based on the determined time of flight of the respective set of radio signals; deriving a position of the first tag module and / or the first subordinate vehicle in the reference coordinate system based on the calculated distances; and providing a report signal indicating the derived position of the first subordinate vehicle.

The invention discloses a personnel protection system and method applied to a coal mine tunneling robot and a medium, mainly relates to the technical field of coal mine tunneling robots, and aims to solve the problems that existing personnel easily enter a robot operation area by mistake, personal protection equipment focuses on post-event protection and lacks the beforehand early warning and active protection capabilities, and in addition, the personnel protection efficiency is greatly improved. According to an existing scheme, only a single environment parameter or a robot state is concerned, and the influence of various environment factors and robot operation states on personnel safety is not comprehensively considered. Comprising the steps that a central processing module determines whether environment abnormity exists; according to the robot coordinate, the robot relative velocity vector, the position coordinate of the operator and the operator velocity vector, whether the operator is in a dangerous state is determined; determining whether the robot operates abnormally; obtaining an abnormal analysis result, and issuing the abnormal analysis result to a protection control module; and the protection control module is used for determining a corresponding preset protection processing program according to the exception analysis result.

This invention discloses a frequency-hopping method and apparatus for magnetic field quality assessment based on radio electromagnetic positioning, relating to the field of radio electromagnetic positioning. The method includes: constructing and calibrating a radio electromagnetic positioning system to obtain a calibration coefficient matrix; traversing each group of excitation signals in the signal combination, inputting the excitation current corresponding to the three different frequencies of excitation signals in each group of excitation signals to the transmitting module; acquiring the induced voltage generated by the receiving module and performing a Fourier transform to obtain a voltage amplitude matrix; calculating the corresponding magnetic flux density matrix based on the voltage amplitude matrix and the calibration coefficient matrix; constructing and solving an objective equation based on the vector formed by the magnetic flux density matrix and its singular values ​​to obtain three singular values; calculating the magnetic field quality coefficient corresponding to each group of excitation signals based on the three singular values, and determining the operating frequency of the radio electromagnetic positioning system for electromagnetic positioning. This invention solves the problem of increased positioning errors caused by magnetic field distortion.

A method of estimating a relative position of a first robot with respect to a second robot at a current timestamp, wherein a first ultra-wideband (UWB) tag is installed on the first robot, the first UWB tag being a rotating tag configured to move in a circular path about a centre of rotation on the first robot, wherein a second UWB tag is installed on the second robot, the method comprising: receiving an estimate of the relative position of the first robot with respect to the second robot calculated at an earlier timestamp; obtaining rotating tag offset values of the first UWB tag with respect to the first robot at the earlier timestamp and at the current timestamp; obtaining a velocity value of the first robot at the earlier timestamp; obtaining a velocity value of the second robot at the earlier timestamp; obtaining distance values between the first UWB tag and the second UWB tag at the earlier timestamp and at the current timestamp; and calculating the relative position of the first robot with respect to the second robot at the current timestamp according to: the estimate of the relative position calculated at the earlier timestamp, the rotating tag offset values of the first UWB tag with respect to the first robot at the earlier timestamp and at the current timestamp, the velocity values of the first robot at the earlier timestamp, the velocity values of the second robot at the earlier timestamp, and the distance values between the first UWB tag and the second UWB tag at the earlier timestamp and at the current timestamp.

A beacon-based approach guidance system is disclosed. The disclosed method includes digitizing at least one signal received at an antenna array of a receiver of a vehicle into a digitized data stream of I and Q samples, the at least one signal received from a beacon, the at least one signal modulated at the beacon with a pseudo-random code, the I and Q samples are associated with a locally generated pseudo-random code of the receiver to recover the carrier signal, and a direction of arrival of the at least one signal from the beacon in the vehicle reference frame is calculated based on a relative phase characteristic of the recovered carrier signal.

Disclosed are techniques for wireless communication. In an aspect, a receiving entity (RE), e.g., a user equipment or base station, receives a positioning resource beam configuration that defines a set of positioning resources, each positioning resource being transmitted by a transmission / reception point (TRP) at different times using different beams, each of the different beams having a set of beam characteristics that differs from the set of beam characteristics of another of the different beams in at least one beam characteristic. The RE performs positioning measurements on the different beams at the different times, at least based on the sets of beam characteristics, and sends positioning information to the TRP, the positioning information comprising at least some of the positioning measurements, a positioning estimate, or combinations thereof.

Methods, systems, and devices for wireless communications are described. A device may receive a directional positioning reference signal over one or more beams from another device. The device may transmit a broadcast positioning reference signal in response to receipt of the directional positioning reference signal. The device may receive, from the other device, a report including timing and directionality associated with transmission of the directional positioning reference signal. The report may also include timing and directionality associated with receipt of the broadcast positioning reference signal at the other device. Responsive to receipt of the report, the device may transmit beam specific measurement information associated with the one or more beams to the other device. The device may communicate with the other device using a beam of the one or more beams based at least on the report and the beam specific measurement information.

An apparatus for a wireless communication system is provided. The apparatus is to transmit a reference signal on a common set of resource elements (REs), the common set of resource elements being used by one or more further apparatuses in the wireless communication system, so that the reference signal of the apparatus and one or more further reference signals of the one or more further apparatuses use the same resource elements. Moreover, the apparatus is to transmit the reference signal depending on a base sequence or a sequence derived from the base sequence and depending on a set of configuration parameters.

The present invention relates to an indoor positioning system 300 for a wireless communication network 200. The indoor positioning system 300 includes one or more anchor devices 302a-302n, a central entity 306, and one or more tag devices 304a-304n. Transmission of signals 301a-301n by the one or more tag devices 304a-304n is controlled so that one signal 301a is transmitted at a time on a given radio resource, and the tag device 304a transmitting one signal 301a is the tag device 304a to be located. At least one anchor device (302a) of the one or more anchor devices (302a-302n) is configured to receive, via an antenna array (500), a signal (301a) transmitted by a positioned tag device, determine an estimate of a direction of arrival (DOA) based on the received signal (301a) by applying a first power law based algorithm and a second power law based algorithm, respectively, and transmit the estimated DOA together with DOA metadata to a central entity (306). The present invention also relates to an indoor positioning method, an anchor device, a computer program, and a computer-readable medium.

There is provided a computer program, apparatus and method for causing an apparatus of a first user equipment to receive sidelink positioning resource information from at least one second user equipment, the sidelink positioning resource information indicates whether at least one second user equipment is currently allocated to a resource for signaling communication of at least one sidelink positioning signal of at least one other first user equipment; using the received sidelink positioning resource information to determine whether to signal an indication to at least one second user equipment, the indication to configure a new resource used by the at least one second user equipment for signaling communication with at least one other first user equipment and / or the first user equipment; and performing or forgoing performing the indication to configure the new resource by signaling according to the determination.

This disclosure relates to techniques for determining and presenting an indication of a closest cellular service location in a wireless communication system. A wireless device may receive cellular connectivity event information. The wireless device may determine a closest cellular service availability location for the wireless device based at least in part on the cellular connectivity event information. An indication of the closest cellular service availability location may be presented via one or more user interface elements. The closet cellular service availability location may be different than a most recent cellular service availability location.

Vehicle side door structure, which features: a side door body section (30) configured to open and close a side door opening (22), wherein the side door body section (30) includes an inner door panel (32) and an outer door panel (34), and a sensor (50) located inside the side door body section (30) between the inner door panel (32) and the outer door panel (34), wherein the sensor (50) includes a detection component (50A) configured to be directed outwards in the width direction of the vehicle and to detect information in the lateral direction of the vehicle (10) by using at least one of the waves, radio wave, light or ultrasonic wave, as a detection medium, wherein a permeable section (34P) is arranged on the outside of the detection component (50A) in the vehicle width direction, wherein the permeable AbSection (34P) is configured as a part of the outer door panel (34) and is configured by a material that allows the transmission of at least one of the waves, radio wave, light or ultrasonic wave, as the detection medium through the material, characterized by the fact that a reinforcing element (42), which is positioned with its longitudinal direction corresponding to the vehicle's forward and backward direction, is arranged inside the side door body section (30), and the measuring transmitter (50) is placed on the outside of the amplifying element (42) in the vehicle width direction and is secured to the amplifying element (42), wherein the reinforcing element (42) is a waistline reinforcement (70) which is placed along a waistline.

This invention relates to an antenna soft-switching system (310, 1000, 1200) for a launch angle (AoD) direction-finding transmitter unit (300). The soft-switching system (310, 1000, 1200) includes: a timing unit (301) for at least obtaining the start time of a switching event; a switching network (303) disposed on a radio frequency (RF) signal path between an RF port (304) and a first antenna port (306a) and a second antenna port (306b); and a generator unit (302) for generating at least one waveform for controlling the switching network (303). The generator unit (302) is configured to control the switching network (303) such that the amplitude of the RF signal switches substantially smoothly from the first antenna port (306a) to the second antenna port (306b), thereby reducing undesirable transmission levels of the transmitted RF spectrum of the AoD direction-finding transmitter unit (300). The present invention also relates to an AoD direction finding transmitter unit (300) including an antenna soft switching system (310, 1000, 1200) and an antenna soft switching method for the AoD direction finding transmitter unit (300).

A marker for burying adjacent an underground structure such that a location of the underground structure can be identified from above a ground surface. The marker comprises a housing, a gimbal beacon retention device disposed within the housing. The gimbal beacon retention device comprises an outer gimbal structure and an inner gimbal structure rotatable disposed within the outer gimbal structure and carrying the beacon device. The gimbal beacon retention device is structured and operable to orient the beacon device in a desired orientation relative to a ground surface regardless of the orientation of the housing relative to the ground surface.

A method for an electronic device to join a downlink-time difference of arrival (DL-TDoA) network as an ad hoc anchor device is provided. The method includes, determining a location of the electronic device, and determining whether a condition to operate as the ad hoc anchor device in the DL-TDoA network is satisfied. The method also includes, in response to the condition being satisfied, transmitting a request message to operate as the ad hoc anchor device in the DL-TDoA network to a server device.

Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives a set of antenna parameters for a plurality of antenna ports of a transmission-reception point (TRP), obtains positioning measurements of a plurality of positioning reference signal (PRS) resources transmitted on the plurality of antenna ports, reconstructs an underlying physical channel between the TRP and the UE based on the positioning measurements of the plurality of PRS resources, and determines a downlink angle of arrival (DL-AoD) measurement from the TRP to the UE based on the reconstructed underlying physical channel.

An electronic device wirelessly communicates with a terminal device by a wireless communicator, and includes a direction information acquisition unit and a processor. The direction information acquisition unit acquires, based on a beacon signal received by the wireless communicator from the terminal device, direction information related to a direction of the terminal device with respect to a reference position of the electronic device. The processor performs wireless connection of wirelessly connecting to the terminal device when the processor determines that, based on the direction information, the terminal device is positioned in a predetermined direction range.

The subject matter disclosed here includes a mobile localization system mountable onboard a mobile platform configured to receive and process signals transmitted by multiple cellular base-stations for the purpose of positioning the mobile platform.