Abstract: Techniques for determining a location of a mobile device are provided. An example of a method according to the disclosure includes determining, on the mobile device, beam identification information for one or more radio beams, transmitting, with the mobile device, the beam identification information to a network node, receiving, at the mobile device, positioning reference signal beam information for one or more positioning reference signals, generating, with the mobile device, one or more receive beams based on the positioning reference signal beam information, obtaining, with the mobile device, at least one measurement from at least one of the one or more positioning reference signals, and facilitating location determination of the mobile device at a location-capable device based at least in part on the at least one measurement.

Abstract: A UE may receive at least two baseband signals at two or more antenna or beam ports of the UE over a measurement period, and determine an amount of motion of the UE based on the received at least two baseband signals. In one aspect, the amount of motion of the UE may be determined based on a variation of at least one phase delta of the at least one channel. In another aspect, the amount of motion of the UE may be determined based on a correlation between the at least two baseband signals.

Abstract: A radio station, in particular an access point, for client localization in a multipath indoor environment is disclosed. The radio station comprises: a circular antenna array comprising uniform circularly arranged antenna elements; and a processor configured to: transform first input data from the circular antenna array into second input data using a transform that transforms the first steering vector of the circular antenna array into a second steering vector of a virtual linear antenna array; and transform the second input data into third input data by using a transform that transforms the second steering vector of the virtual linear antenna array into a third steering vector of a second virtual linear antenna array, comprising a larger number of antenna elements than the virtual linear antenna array; and determine an angle of arrival based on the third input data.

Abstract: Systems and devices for phase-accurate vehicle positioning are disclosed. These systems and devices facilitate high-precision estimations of positions, orientations, velocities, and accelerations of signal nodes in a distributed network (e.g., including base stations and vehicles, such as aircraft or unmanned aerial systems (UASs)). The positioning estimations are based on time-of-arrival estimations of low-bandwidth signals and a phase-accurate distributed coherence algorithm. In some cases, the low-bandwidth signals may further facilitate joint communications and positioning estimations between the signal nodes.

Abstract: A noise reduction device includes: a combiner to shift a phase of one of a first signal propagating through a first propagation path and a second signal propagating through a second propagation path by a predetermined angle and combine the phase-shifted one signal of the first signal and the second signal with the other signal of the first signal and the second signal; and a phase difference absorption circuit having a phase shift characteristic that reduces a difference between a phase difference between two signals each having a lower limit frequency of a band of the broadcast wave and passing through the first propagation path and the second propagation path and a phase difference between two signals each having an upper limit frequency of the band of the broadcast wave and passing through the first propagation path and the second propagation path.

Abstract: A method may be provided. One or more packets from a client may be received, in a block based modulation environment, at one or more switchable antennas of an access point. The access point may have a plurality of switchable antennas. Each switchable antenna may have an antenna state. The plurality of switchable antennas may be switched among such that at least five of the antenna states are sampled. Angle of arrival of the client may be calculated based on the at least five of the antenna states.

Abstract: A reusable battery indicator comprises a voltage sensor configured to convert sensed analog characteristics of a battery to digital information; a communication circuit communicatively connected to the voltage sensor; an antenna operatively coupled to the communication circuit; and a connection mechanism having at least a first connector and a second connector that are electrically connected to the voltage sensor, the first connector and the second connector being adapted to be removably connected to a first battery terminal and to a second battery terminal, respectively, thereby completing an electrical circuit between the voltage sensor and the first and second battery terminals when the connection mechanism is coupled to the first battery terminal and to the second battery terminal.

Abstract: Embodiments of the disclosure are drawn to apparatuses, systems, and methods for radio direction finding with an iterative ambiguity resolution algorithm. An antenna array may receive an emitted signal. Two or more phase shifts in the received emitted signal may be determined between two or more pairs of antennas of the antenna array. A set of possible expected phase shifts may be generated from at least two of the measured phase shift. To determine the proper one of the set of expected phase shifts, a set of initial guesses for parameters of a fitting equation may be generated and then each may be optimized to determine optimized fitting parameters. From these optimized fitting parameters a direction of arrival of the emitted signal may be determined.

Abstract: The present disclosure obtains a correction value that corrects measurement angle error signals more accurately than conventional methods even in a case where a radio wave signal-to-noise ratio is low, and thus tracks a communication counterpart more accurately than the conventional methods.

Abstract: An angle-resolving radar sensor for motor vehicles, having an antenna system having a plurality of antennas set up for receiving, configured in various positions in a direction in which the radar sensor is angle-resolving, and having a control and evaluation device designed for an operating mode in which at least one antenna of the radar sensor that is set up for transmitting sends out a signal that is received by a plurality of the antennas of the radar sensor that are set up to receive, the control and evaluation device being designed, in the mentioned operating mode, for an individual estimation of an angle of a radar target to determine respective individual distances of the radar target for each of the evaluation channels, which correspond to different configurations of transmitting and receiving antennas, and to use the individual distances in the estimation of the angle of the radar target.

Abstract: We have demonstrated that the bandwidth millimeter wavelengths offer can be leveraged to deeply spread a low-data rate signal below the thermal floor of the environment (sub-thermal) by lowered transmit power combined with free space losses, while still being successfully received through a novel dispreading structure which does not rely on pre-detection to extract timing information. The demonstrated data link ensures that it cannot be detected beyond a designed range from the transmitter, while still providing reliable communication. A demonstration chipset of this sub-thermal concept was implemented in a 28 nm CMOS technology and when combined with an InP receiver was shown to decode signals up to 30 dB below the thermal noise floor by spreading a 9600 bps signal over 1 GHz of RF bandwidth from 93 to 94 GHz using a 64 bit spreading code. The transmitter for this chipset consumed 62 mW while the receiver consumed 281 mw.

Abstract: A correlation and track system identifies whether a Radar warning (RW) Track contains one or more emitters by receiving a set of initial Short and Long Baseline Interferometer (SBI) (LBI) detections; receiving inertial navigational data; receiving subsequent LBI detections; determining whether the LBI detections represent one or multiple emitter(s) by designating an initial SBI conic with a multiple of its one sigma conic Direction Finding (DF) accuracy window as containing the emitter; laying down a set of grid points within the SBI conic window as possible emitters' locations; summing real and imaginary values of a residual phase in the form of a unit vector at each grid point for each LBI update; identifying whether there are one or more emitters in RW track based on whether the magnitude of a peak vector is above or below a defined threshold; and invoking geolocation algorithms based on the vector's magnitude.

Abstract: A motion tracking system for tracking the motion of a subject in an environment, the system comprising: an imaging device adapted to be worn by the subject; an accelerometer adapted to be worn by the subject; and a processor configured to receive a series of images of the environment captured by the imaging device and to form, in dependence on the images an estimate of the subject's position in the environment, and to receive acceleration data from the accelerometer and to, form an estimate of the motion of a part of the subject's body carrying the accelerometer in dependence on the acceleration data and the estimated position.

Abstract: The system and method of projectile flight management using a combination of radio frequency orthogonal interferometry for the long range navigation and guidance of one or more projectiles and a short range navigation and guidance system to provide for more accurate targeting.

Abstract: Systems and methods are provided in which a direction of arrival of a radio frequency (RF) signal received by a plurality of antennas is determined. A plurality of first converter receives RF signals from the plurality of antennas and outputs a minimum of a first optical signal and a second optical signal each modulated by their corresponding RF signal. A plurality of second converters receives a minimum of the first optical signal via a first optical channel that introduces a first delay and the second optical signal via a second optical channel that introduces a second delay. The second converter outputs a first RF signal that corresponds to the RF modulation on the first optical signal and a second RF signal that corresponds to the RF modulation on the second optical signal. A switch serially receives, from the second converter outputs, the first RF signal and the second RF signal.

Abstract: A controller is formed as an array of transmitting antennas and receiving antennas that are placed on the skin of a user so that the underlying movement of the user's skin can be measured by the interaction of the transmitting antennas and the receiving antennas. In an embodiment, the transmitting antennas and receiving antennas are located in an area proximate to the wrist. The movement of the transmitting antennas and subsequent measurement of signals received by receiving antennas are used in order to determine position and pose of the hand and its digits.

Abstract: An antenna measurement system is described, comprising a device under test and a measurement antenna array. Said measurement antenna array comprises a plurality of antenna elements. Said measurement antenna array is positioned in the near field of said device under test. Said measurement antenna array is positioned such that the main orientation of said measurement antenna array is inclined with respect to the boresight of said device under test and said measurement antenna array. Further, a method for controlling a measurement antenna array is described.

Abstract: A method for automatically determining a potential transmission region, comprising: acquiring multiple binary indications for a direct line of sight between a transmitter and an airborne vehicle respective of multiple geo-positions of the airborne vehicle; acquiring each of the multiple geo-positions respective of each of the multiple binary indications for the direct line of sight; for each one of the acquired geo-positions, determining a layer of access respective of topographical data for the geographical region and the acquired geo-position, as a subset of the geographical region that includes at least one potential point defining a potential line of sight between the transmitter and the airborne vehicle, thereby determining multiple layers of access; determining an intersection of the multiple layers of access; and determining, from the intersection, the potential transmission region respective of the transmitter and the geo-positions of the airborne vehicle.

Abstract: A base station of a vehicle includes an angle of arrival (AoA) antenna assembly and a controller. The AoA antenna assembly is positioned at a known location of the vehicle. The AoA antenna assembly includes a pair of antennas on a printed circuit board to detect an angle of arrival of a wireless signal as received by the AoA antenna assembly from a portable remote control. The wireless signal may be a Bluetooth™, a Bluetooth™ low energy (BLE), a Wi-Fi™, or an ultra-wideband (UWB) wireless signal. The remote control may be in the form of a phone or a key fob. The controller uses the detected angle and the known location of the AoA antenna assembly to locate the portable remote control relative to the vehicle. The controller may perform a passive entry passive start (PEPS) operation of the vehicle as a function of the location of the remote control.

Abstract: A method of determining a direction of arrival of a signal at a device comprising an antenna with multiple antenna elements, in a processor of the device configured to calculate an average signal for each antenna element based on the signal received at the antenna element over N time slots, determine respective phases of the average signals and determine at least one of an azimuth and elevation angle of the signal using the determined phases and information of the location of the antenna elements.

Abstract: Methods and systems for spatial filtering transmitters and receivers capable of simultaneous communication with one or more receivers and transmitters, respectively, the receivers capable of outputting source directions to humans or devices. The methods and systems use spherical wave field partial wave expansion (PWE) models for transmitted and received fields at antennas and for waves generated by contributing sources. The source PWE models have expansion coefficients expressed as functions of directional coordinates of the sources. For spatial filtering receivers a processor uses the output signals from at least one sensor outputting signals consistent with Nyquist criteria representative of the wave field and the source PWE model to determines directional coordinates of sources (wherein the number of floating point operations are reduced) and outputs the directional coordinates and communications to a reporter configured for reporting information to humans.

Abstract: An angle of arrival system can be self-calibrating. The angle of arrival system can continuously estimate imperfections caused by the analog RF components and dynamically apply corrections based on these estimates. As a result, an angle of arrival system can employ inexpensive components, will not require factory calibration, but can still perform geolocation with high precision.

Abstract: A position specifying device communicable with a transmitter supporting Bluetooth Low Energy (BLE) is provided. The position specifying device includes: a signal receiving unit configured, by using multiple antennas each having different directivity, to receive BLE radio signals transmitted from the transmitter and to measure respective receiving strengths of the BLE radio signals; and a specifying unit configured to specify a position of the transmitter by comparing the respective receiving strengths measured via each of the multiple antennas.

Abstract: A method for determining geo-position of a target by an aircraft includes: receiving navigation data related to the aircraft including aircraft attitude information; receiving multilateration information related to the target including an angle to the target; calculating an axis for a cone fixed to the aircraft, based on the received aircraft attitude information; calculating a central angle for the cone from the received angle to the target; generating two vectors orthogonal to the cone axis; calculating a cone model from the axis, the central angle and the two vectors; and intersecting the cone model with an earth model to obtain a LEP curve, wherein the LEP curve is used to determine the geo position of the target.

Abstract: Provided is an auxiliary parking method, apparatus and system. The method includes: starting a vehicle image acquisition mode; receiving a plurality of radio frequency signals synchronously transmitted by at least two radio frequency identification transmitters distributed in a parking area in real time; determining a current position of a vehicle in the parking area according to the plurality of radio frequency signals as received; and displaying information identifying a vehicle virtual position to be parked in an image of the vehicle according to the current position of the vehicle in the parking area as determined and at least one available vehicle virtual position in the parking area.

Abstract: An apparatus includes a housing having a horn with a mouth and a throat. The mouth of the horn is larger in cross section than the throat of the horn. The housing further includes a waveguide providing communication from the throat of the horn. The apparatus further includes a printed circuit board supported by the housing and a microphone sensor. The microphone sensor is mounted to a printed circuit board. The waveguide provides communication from the throat of the horn to the microphone sensor. The apparatus may be configured to include a housing having a waveguide providing communication to an interior of the housing, a printed circuit board supported by the housing within the interior of the housing, and a microphone sensor.

Abstract: A method and apparatus for receiving (RX) radio-frequency (RF) signals suitable for MRI and/or MRS from MRI “coil loops” (antennae) that are overlapped and/or concentric, and each of which has a preamplifier and frequency-tuning circuitry and an impedance-matching circuitry, but wherein the loops optionally sized differently and/or located at different elevations (distances from the patient's tissue) in order to extract signal from otherwise cross-coupled coil loops and to improve signal-to-noise ratio (SNR) in images made from the received signal.

Abstract: The effectiveness of calculating FIR filter coefficients for beam-forming filters for transducer arrays such as arrays of microphones or loudspeakers, for example, is increased in that the calculation is performed in two stages; namely, on the one hand, by calculating frequency domain filter weights of the beam-forming filters, i.e., coefficients describing the transfer functions of the beam-forming filters within the dimension of the frequency so as to obtain target frequency responses for the beam-forming filters, so that applying the beam-forming filters to the array approximates a desired directional selectivity, and followed by calculating the FIR filter coefficients for the beam-forming filters, i.e., of coefficients describing the impulse response of the beam-forming filters within the time domain, such that the frequency responses of the FIR beam-forming filters approximate the target frequency responses in an optimum manner in accordance with defined criteria.

Abstract: Disclosed are systems, devices and methods for determining an angle of arrival (AoA) of a signal transmitted between devices. Particular implementations enable obtaining measurements of AoA from signals that are not pure tone signals. In one aspect, a reference signal may emulate one or more aspects of a packet signal as transmitted by a transmitter. An AoA of the packet signal may be determined based, at least in part, on the packet signal and the reference signal.

Abstract: In an array antenna having a plurality of subarrays, a direction finding system and technique includes receiving signals at an array antenna and capturing data with a plurality of groups of subarrays. Each group of subarrays may capture data during a selected one of a plurality of different dwell times. The method further includes generating a plurality of dwell spatial sample covariance matrices (SCMs) using data corresponding to one or more of the plurality of groups of subarrays and combining the plurality of dwell spatial SCMs in complex form to generate an aggregate covariance matrix (ACM). The ACM may then be used in subsequent processing with MINDIST technique to estimate a direction of a received signal based on the combined data.

Abstract: It is possible to reduce the overhead associated with downlink channel estimation in massive Multiple-Input-Multiple-Output (MIMO) networks by processing training sequences according to a transformation matrix. The transformation matrix maps a generic dictionary to a non-generic dictionary associated with an antenna geometry of a MIMO antenna array. The transformation matrix can be computed based on the two dictionaries. In one embodiment, the training reference signal is precoded to obtain a precoded training reference signal, which is then transmitted over a MIMO antenna array. The training precoder used to precode the training reference signal is designed according to the transformation matrix to mitigate a dependence that the training reference signal transmission has on the antenna geometry.

Abstract: A manufacturing process for providing an assembly formed of a first piece and a best fitted second piece is described. The manufacturing process is carried out by performing at least the following operations: receiving the first piece characterized in accordance with at least a first attribute, selecting the best fitted second piece from a buffer, the selecting based in part upon a best matching value of a second attribute in relation to the first attribute, replacing the selected best fitted second piece with another second piece such that the number of second pieces in the buffer remains about the same, and forming the assembly the first part and the second part to form the assembly.

Abstract: Position and orientation tracking systems and methods include a transmitting antenna transmitting a radio frequency (RF) signal. At least one receiving antenna acquires the RF signal. One of the at least one receiving antenna and the transmitting antenna is designated a reference antenna. A processing unit determines a phase difference between the RF signal received by each receiving antenna and the reference antenna. The processing unit computes a position of the transmitting antenna with respect to the at least one receiving antenna in response to the phase difference determined for each receiving antenna.

Abstract: Disclosed is a hybrid direction detection apparatus and method that may perform a precise direction detection through a one-time rotation of a log period (LP) antenna and a one-time phase difference measurement of a dipole antenna and may remove an ambiguity error of the LP antenna by two dipole antennas spaced apart by a distance of about 0.5? by finding an approximate direction using the LP antenna that is a directional antenna, by measuring a phase difference between arrival waves using two baselines including two dipole antenna in the corresponding direction, and thereby precisely finding a final direction.

Abstract: Embodiments described herein provide a method for carrier frequency offset and frequency drift cancellation based indoor position estimation. A wireless signal including a plurality of data samples is received at a receiving antenna and from a mobile device. Information relating to an antenna switching pattern for transmitting or receiving the wireless signal may then be obtained from the wireless signal. A phase difference is calculated associated with each data sample of plurality of data samples. Carrier frequency offset and frequency drift cancellation may be applied to the phase difference to obtain a compensated phase difference. A direction estimate of the mobile device may then be generated based at least in part on the compensated phase difference.

Abstract: A method is described for the wireless signal transmission of a measurement signal and/or a control signal between two functional components of a MR system. The measurement signal and/or the control signal is encoded into a RF transmit signal with a predefined orbital angular momentum and this RF transmit signal is transmitted between transmit antenna arrangements of the functional components. In addition, the embodiments relate to a local coil and an orbital angular momentum transmit unit with which the method may be carried out, and also a MR system that has a local coil and an orbital angular momentum transmit unit of this type.

Abstract: Described herein is an exemplary torque sensing assembly for a feed mixer that includes, a frame of a feed mixer, the frame having a first frame portion and a second frame portion; a transmission having at least two speeds, a housing, an input shaft, and an output shaft, a load cell secured to a second frame portion of the frame; a mounting plate having a first side portion and a second side portion situated opposite the first side, the transmission secured by a plurality of fasteners to a top surface of the mounting plate, hinge rotatably connecting the first side portion to the first frame portion, and a load contact point situated in contact with the load cell, wherein a resultant torque is impartable to the housing to provide a downward force on the load cell, via the load contact point.

Abstract: Disclosed is a method performed by a radio base station, RBS, in a wireless communication network for controlling transmission of signals from the RBS to user equipments, UEs. The RBS uses beam forming to direct a signal towards a receiving UE. The method comprises: determining transmission directions to a plurality of UEs served by the RBS, instructing to transmit a signal in a determined first transmission direction D1 to a first UE of the plurality of UEs. The method further comprises calculating a first difference ?2 between the first transmission direction D1 and a determined second transmission direction D2 to a second UE, and calculating a second difference ?3 between the first transmission direction D1 and a determined third transmission direction D3 to a third UE, and scheduling transmission of signals to the second UE and the third UE based on the calculated first and second differences in transmission direction ?2 and ?3, respectively. A corresponding RBS is also disclosed.

Abstract: The present technology may be directed a system for determining an angle and distance between a positioning node and secondary device using a plurality of acoustic transmitters to transmit acoustic ranging signals that are modulated using ranging sequences, respectively. The system includes an acoustic receiver to detect the acoustic ranging signals, and a signal processor to calculate times of arrival and a plurality of aliased angles of arrival of the acoustic ranging signals. An anti-aliasing module may select an angle of arrival from the calculated plurality of aliased angles using the times of arrival of the acoustic ranging signals. A time of flight may be calculated from a comparison of times of arrival for radio signals and the acoustic signals. The time of flight may be used to calculate the distance between the positioning node and secondary device.

Abstract: Methods and systems of localizing a device are presented. In an example method, a communication signal from a device is received by a wireless reference point during a period of time. A sequence of values is generated from the communication signal, as received by the wireless reference point, during the period of time. The sequence of values is supplied to a learning model configured to generate an output based on past values of the sequence of values and at least one predicted future value of the sequence of values. The current location of the device is estimated during the period of time based on the output of the learning model.

Abstract: In a MIMO communication system that includes a transmitter and a receiver and forms line-of-sight orthogonal channels between the transmitter-side transmitting antenna and the receiver-side receiving antenna, the MIMO communication system is provided between the transmitting antenna and the receiving antenna with an optimum antenna-to-antenna spacing shortening unit to shorten an optimum antenna-to-antenna spacing by changing the phase rotation of a carrier wave used for directly opposed waves between opposed antennas, and the phase rotation of a carrier wave used for intersecting waves between oblique antennas in such a manner that the amount by which one of the phase rotations changes is different from that by which the other phase rotation changes.

Abstract: Methods and systems are provided for detecting a synchronization failure of a base station in a wireless communications network. A server receives synchronization data, such as a phase offset between two base stations, from one or more base stations. A difference between each of the synchronization data and the corresponding control data is computed to determine if one or more of the differences is outside a predetermined threshold. If so, the base station that has the synchronization failure is identified.

Abstract: A system for estimating an angle of arrival of a signal includes an object, a movable component that is movably coupled to the object, and at least first and second spaced-apart antennas coupled to the movable component. The system also includes a controller that is configured to estimate an angle of arrival of a signal based on a difference between a time the signal arrives at the first antenna and a time the signal arrives at the second antenna while the movable component is moving, and a difference between a frequency of arrival of the signal at the first antenna and a frequency of arrival of the signal at the second antenna while the movable component is moving.

Abstract: Systems, Methods, and Apparatus for enhanced transponder programming in an open road toll system are disclosed. An example method includes transmitting, in a normal mode, a programming signal from one of the antennas over a first coverage area to instruct the transponder to store data in its memory, the data being contained in the programming signal. The example method further includes determining that the transponder did not store the data in its memory. Based on the determination that the transponder did not store the data in its memory the programming signal is transmitted in an enhanced mode, from one antennas over a second coverage area.

Abstract: A system and method are disclosed for coordinating the scheduling of beamformed data to reduce interference in a wireless system. A first optimum phase adjustment is determined to increase the gain of an intended signal at a mobile device. A second optimum phase adjustment is determined to decrease the gain of interfering signals received at the mobile device. Using a phase adjustment map, a transmission is scheduled at a base station within wireless resources using the first optimum phase adjustment, at the same time an interfering base station is transmitting at the second optimum phase adjustment angle. Thus, signal strength is greatly improved while interference is greatly reduced, improving the efficiency of the wireless system.

Abstract: Embodiments of the present invention include a method of determining a location of a mobile device. The method comprises transmitting a signal between a plurality of known locations and receiving signal at device of unknown location such as a mobile device. The signal may include multiple tones having different frequencies and resulting in sets of residual phase differences. The location of the mobile device may be determined using the known locations and the frequency and phase differences between the transmitted tones. In one embodiment, OFDM signals may be used between an access point and mobile device, for example, to determine the location of the mobile device.

Abstract: A method of signal processing includes calculating a range based on information from a reflected ultrasonic signal. Based on the calculated range, one among a plurality of direction-of-arrival (DOA) estimation operations is selected. The method also includes performing the selected operation to calculate an estimated direction of arrival (DOA) of an audio-frequency component of a multichannel signal. Examples of DOA estimation operations include operations based on phase differences between channels of the multichannel signal and operations based on a difference in gain between signals that are based on channels of the multichannel signal.

Abstract: A method of transferring data between a first mobile terminal and a second terminal, the method includes displaying an object on a display unit of the first mobile terminal; receiving an input of a directional gesture on the displayed object; and transmitting the object to the second mobile terminal based on the input gesture, when the first mobile terminal and the second terminal are in a predetermined directional range with respect to each other.

Abstract: A method, comprising: detecting, at an apparatus, one or more radio signals from a first location; using the one or more detected radio signals to estimate a bearing from the first location; and using the bearing estimate to determine whether further detection of one or more radio signals is required before positioning the apparatus; and positioning of the apparatus using a bearing and constraint information.

Abstract: A system, method and apparatus is provided for calculating the position of a single receiver by receiving a signal from an emitter. Either the receiver or the emitter may be stationary relative to the surface of the Earth. The invention may use a particle filter to optimize the efficiency of the position calculation. The invention may further utilize a particle filter to estimate the frequency drift and bias of the emitter and/or receiver, and use the estimated frequency drift to improve the position calculation. In one embodiment, the invention may be used to calculate the position of a single GPS receiver given the position of, and a transmission from, a single GPS satellite.