Abstract: Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.

Abstract: Disclosed active reflector apparatus and methods that inhibit self-induced oscillation. One illustrative apparatus embodiment includes an amplifier and an adjustable phase shifter. The amplifier amplifies a receive signal to generate a transmit signal, the transmit signal causing interference with the receive signal. The adjustable phase shifter modifies the phase of the transmit signal relative to that of the receive signal to inhibit oscillation. A controller may periodically test a range of settings for the adjustable phase shifter to identify undesirable phase shifts prone to self-induced oscillation, and may maintain the phase shift setting at a value that inhibits oscillation.

Abstract: Systems and methods for predictive coordination of ego radar and interferer radar parameters are disclosed. In some aspects, a processor associated with a first radar system transmitting a first radar waveform to detect a target may identify a presence of a second radar system transmitting a second radar waveform in a vicinity of the first radar system. The processor may further predict an upcoming interference by the second radar waveform of the detection of the target by the first radar system. In addition, the processor may, in response to the predicting the upcoming interference, determine an adjustment to a first parameter of the first radar waveform and/or to a second parameter of the second radar waveform.

Abstract: A method for interpolated virtual aperture array radar tracking includes: transmitting first and second probe signals; receiving a first reflected probe signal at a radar array; receiving a second reflected probe signal at the radar array; calculating a target range from at least one of the first and second reflected probe signals; corresponding signal instances of the first reflected probe signal to physical receiver elements of the radar array; corresponding signal instances of the second reflected probe signal to virtual elements of the radar array; interpolating signal instances; calculating a first target angle; and calculating a position of the tracking target relative to the radar array from the target range and first target angle.

Abstract: A method and apparatus for measuring the angle of arrival AOA of Wi-Fi packets, using a switched beam antenna SBA is described. Wide antenna beams, quadrants, are selected in turn and a burst of packets is transmitted on each quadrant. The quadrant with the highest average signals strength is selected. Then the narrow antenna beams that make up that selected quadrant are selected, in sequence, and the average signal strength for each narrow beam is recorded. The narrow beam with the highest average signal strength is returned as the AOA. Based upon which narrow beam recorded the highest signal strength, the next sequence of antenna beams is selected. When the SBA is mounted on a mobile platform, the parameters of the transmission bursts are chosen such that the angular error due to cornering of the platform is negligible.

Abstract: A method for utilizing radar from wireless earpieces includes activating one or more radar sensors of the wireless earpieces, performing radar measurements of a user using the one or more radar sensors of the wireless earpieces, and analyzing the radar measurements to determine pulsatile measurements associated with the user, the analyzing performed using a processor of the wireless earpieces.

Abstract: A method and apparatus resiliently despreads terrestrial navigation signals in which the spreading code duration is equal to an underlying baseband symbol rate, including ground beacons based on civil GNSS waveforms, and malicious spoofers. Symbol-rate synchronous channelizers exploit the baseband symbol rate, and means for blindly and resiliently detecting and determining geo-observables of those signals are described. Disclosed techniques can despread signals in arbitrary multipath, and subject to near-far interference in which the relative strength of the interferer is much higher than the despreading gain of the receiver, including near-far tonal and narrowband co-channel interference.

Abstract: Proposed is a position measuring device configured to measure a position (distance) by combining a TWR positioning method and a PDOA positioning method. The proposed position measuring device: outputs positioning signals at set time intervals; receives response signals for the positioning signals; measures the distance between a plurality of diversity antennas and an object on the basis of the respective positioning signals and response signals transmitted and received by the diversity antennas; and measures the distance to the object on the basis of the measurement values of the distances between the plurality of diversity antennas and the object.

Abstract: Radio frequency (RF) sensing by a sensing entity with an oscillator that introduces frequency errors is supported using dual direction bistatic sensing. The sensing entity transmits a sensing signal that is reflected by an object and received by a second sensing entity, which measures a first frequency offset that includes an oscillator error from the transmission of the sensing signal and a Doppler shift from the object. The sensing entity also receives and measures a second frequency offset of a sensing signal transmitted by the second sensing entity and reflected by the object, which includes a second frequency offset that includes an oscillator error from the reception of the sensing signal and a Doppler shift from the target object. The velocity of the object may be estimated based on a combination of the first and second frequency offsets, which cancels the oscillator error caused by the sensing entity.

Abstract: A sailboat race tracking system includes a race computer and a sailboat computing device authenticated to the race computer. The sailboat computing device transmits position data as a function of time to the race computer. An event organizer computing device sets a race start time and transmits the race start time to the race computer. The race computer receives the position data as a function of time from multiple sailboat computing devices and syncs it according to the race start time. The race computer transmits the time-synced position data of the sailboat computing devices to the sailboat computing devices and spectator computing devices for display.

Abstract: A semiconductor structure includes an isolation feature formed in the semiconductor substrate and a first fin-type active region. The first fin-type active region extends in a first direction. A dummy gate stack is disposed on an end region of the first fin-type active region. The dummy, gate stack may overlie an isolation structure. In an embodiment, any recess such as formed for a source/drain region in the first fin-type active region will be displaced from the isolation region by the distance the dummy gate stack overlaps the first fin-type active region.

Abstract: Embodiments of this application provide a positioning method and apparatus. The method may include setting an ambiguity adjustment parameter for a mobile device, where the ambiguity adjustment parameter is used to record an ambiguity change status used to determine a virtual station observation value for the mobile device. The method may also include adjusting an observation value of a first primary datum station based on a first ambiguity adjustment parameter of the mobile device in a first serving cell to generate a first virtual station observation value, where the first primary datum station is a primary datum station of the first serving cell, and the first virtual station observation value is used to position the mobile device in the first serving cell; and sending the first virtual station observation value to the mobile device.

Abstract: Techniques are provided for utilizing reference signals transmitted by network stations to determine the orientation of a wireless node. An example method for determining an orientation of a user equipment includes determining a first location associated with the user equipment, determining a second location associated with a first wireless node, receiving, with the user equipment, a radio frequency signal transmitted from the first wireless node, determining two measurements based at least in part on the first location, the second location, and angle of arrival information associated with the radio frequency signal, determining a gravity vector based on inertial measurements obtained with the user equipment, and computing the orientation of the user equipment based at least in part on the gravity vector and the two measurements.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a base station performs one or more angle-based measurements in a first coordinate system, determines whether to report, to a positioning entity, the one or more angle-based measurements in a local coordinate system (LCS) or a global coordinate system (GCS), and reports the one or more angle-based measurements to the positioning entity in the LCS or the GCS based on the determination. In an aspect, a positioning entity receives, from a base station, one or more angle-based measurements in an LCS of the base station or a GCS, determines whether the one or more angle-based measurements are in the LCS or the GCS, and processes the one or more angle-based measurements based on the determination.

Abstract: The present disclosure relates to a radar apparatus including a transmitter for transmitting a frequency-modulated continuous-wave radar signal, wherein the transmitter is configured to generate the continuous-wave radar signal with a sinusoidally varying modulation frequency, a receiver for receiving a reflection signal of the frequency-modulated continuous-wave radar signal, which is reflected by at least one object, and for mixing the reflection signal with the frequency-modulated continuous-wave radar signal in order to obtain a downmixed reception signal, and a device for correlating the downmixed reception signal with at least one pattern signal which is based on the modulation frequency and a predetermined distance.

Abstract: An electronic device is provided. The electronic device includes an antenna and an ultra wide band (UWB) communication circuit connected with the antenna. The UWB communication circuit is configured to filter a positioning signal received from the antenna into a specified band to be converted into a digital signal, generate a UWB packet including a first field associated with synchronization and a second field associated with security, obtain a first channel impulse response corresponding to the first field and a second channel impulse response corresponding to the second field, when the UWB packet is valid based on the second field, obtain a third channel impulse response, when there is a correlation between the first channel impulse response and the second channel impulse response, and measure a distance to the external electronic device based on the third channel impulse response.

Abstract: Non-planar semiconductor devices having doped sub-fin regions and methods of fabricating non-planar semiconductor devices having doped sub-fin regions are described. For example, a method of fabricating a semiconductor structure involves forming a plurality of semiconductor fins above a semiconductor substrate. A solid state dopant source layer is formed above the semiconductor substrate, conformal with the plurality of semiconductor fins. A dielectric layer is formed above the solid state dopant source layer. The dielectric layer and the solid state dopant source layer are recessed to approximately a same level below a top surface of the plurality of semiconductor fins, exposing protruding portions of each of the plurality of semiconductor fins above sub-fin regions of each of the plurality of semiconductor fins. The method also involves driving dopants from the solid state dopant source layer into the sub-fin regions of each of the plurality of semiconductor fins.

Abstract: A method for multi-track environmental fault monitoring for aerial platforms includes estimating a normalized squared residual error (NSRE) for each of one or more satellite-receiver tracks over time. The method also includes determining an averaged NSRE for each satellite-receiver track by averaging the NSRE over multiple time windows. The method further includes performing a threshold test on the averaged NSRE to determine a filter state. In addition, the method includes determining whether to apply a scale factor for each satellite-receiver track based on the filter state.

Abstract: According to an aspect, a method of determining two dimensional (2D) angle of arrival (AoA) in a radar system comprising determining one dimensional (1D) AoA to generate a first set of (AoA), selecting a set of valid 1D AoA angles from the first set AoA, and determining the 2D AoA from the set of valid 1D AoA. Wherein the 1D AoA is determined on a first set of data received over a first uniform linear antenna array arranged in the first axis and the 2D AoA is determined on a second set data received over the first and the second MIMO antenna array arranged in the second axis and the set of valid 1D AoA in the first axis. Wherein the second antenna array need not be orthogonal to the first linear antenna array.

Abstract: According to one aspect of the disclosure, a location node configured to communicate with a wireless device is provided. The location node includes processing circuitry configured to: receive spatial information; determine the wireless device relationship between a first reference station and a second reference station based at least in part on the spatial information; compare a first integer ambiguity level of the first reference station with a second integer ambiguity level of the second reference station, the second reference station corresponding to a current reference station of the wireless device; and transmit an indication of an applicability of the first integer ambiguity level of the first reference station to the second integer ambiguity level of the second reference station for position estimation, the indication being based on the comparison of the first integer ambiguity level with the second integer ambiguity level.