Abstract: A receiver, and associated process, for tracking a GNSS positioning signal comprising a carrier modulated by a subcarrier and a spreading code, the receiver comprising: at least one tracking loop configured to calculate a first pseudo range from said GNSS positioning signal, a first discrimination circuit (521) configured to calculate an ambiguous discriminator value from the subcarrier and the spreading code of said GNSS positioning signal, a calculation circuit (522) configured to calculate a value representative of a tracking error of said tracking loop, a second discrimination circuit (530) configured to select one of said ambiguous discriminator value and said value calculated by the calculation circuit, and to generate a first non-ambiguous discriminator value, an amplitude of which is based on an amplitude of the selected value, and a sign of which is a sign of said value calculated by the calculation circuit.

Abstract: A wide-lane ambiguity and a respective satellite wide-lane bias are determined for the collected phase measurements for each satellite for assistance in narrow-lane ambiguity resolution. Satellite correction data is determined for each satellite in an orbit solution based on the collected raw phase and code measurements and determined orbital narrow-lane ambiguity and respective orbital satellite narrow-lane bias. A slow satellite clock correction is determined based on the satellite orbital correction data, the collected raw phase and code measurements, and clock narrow-lane ambiguity and respective satellite narrow-lane bias.

Abstract: A phased array transmitter includes a plurality of vector modulators, an in-phase/quadrature (I/Q) signal generator, and a multiphase generator. The output phases of the plurality of vector modulators, and hence the direction of transmission of the phased array transmitter, are set and controlled by adjusting both the magnitude ratios of I/Q signal pairs generated by the I/Q signal generator and applied to I and Q inputs of the plurality of vector modulators and phases of a plurality of local oscillator (LO) signal phases generated by the multiphase generator and applied to LO inputs of the plurality of vector modulators.

Abstract: An antenna includes a magnetic current element which is an element to constitute a loop and generates a magnetic current vector having a component perpendicular to a loop plane, and an electric current element to generate an electric current vector having a component parallel to the magnetic current vector.

Abstract: The wireless communication device includes a wireless communication transceiver to generate an oscillator control signal and an activation signal, a positioning-system receiver (e.g. a GPS receiver) to process received positioning signals, and a shared oscillator (e.g. a temperature compensated and voltage controlled crystal oscillator TCVCXO) responsive to the oscillator control signal and to generate a reference frequency signal for the wireless communication transceiver and the positioning-system receiver. The positioning-system receiver may control processing of the received positioning signals based upon the activation signal to reduce a noise contribution (e.g. phase noise) due to frequency control of the shared oscillator based upon the oscillator control signal. The activation signal may indicate that the oscillator control signal is being varied to provide frequency control or adjustment of the shared oscillator.

Abstract: A method for aligning visual-inertial odometry (VIO) and satellite positioning system (SPS) reference frames includes obtaining a plurality of range-rate measurements of a mobile platform from an SPS. The range-rate measurements are with respect to a global reference frame of the SPS. The method also includes obtaining a plurality of VIO velocity measurements of the mobile platform from a VIO system. The VIO velocity measurements are with respect to a local reference frame of the VIO system. At least one orientation parameter is then determined to align the local reference frame with the global reference frame based on the range-rate measurements and the VIO velocity measurements.

Abstract: A beamformer comprises a transmission line fed by at least one input feed source, the transmission line comprising two stacked metal plates extending, along two directions, longitudinal X and transverse Y. The transmission line further comprises at least one protuberance extending in the directions X, Y, and in a direction Z orthogonal to the plane XY, the protuberance comprising a metal insert extending in the directions X and Y and extending height-wise in the direction Z, the insert comprising a base fastened to one of the two metal plates and a free end and having a contour of variable length between the two lateral edges of the transmission line. In the protuberance, the transmission line is adjoining the insert and forms, in the direction Z, a circumvolution around the insert.

Abstract: A satellite-based positioning receiver is provided that is configured to combine non-concurrent sets of pseudoranges all taken at a common location to determine at least a 2D position of the common location.

Abstract: A correlation processing method includes generating a correlation code in which a code value of a chip boundary period is set to a value of a replica code, and a code value of a chip center period other than the chip boundary period is set to a predetermined value, and performing a correlation calculation with respect to the correlation code and a received code signal obtained by demodulating a received signal from a positioning satellite.

Abstract: A method and apparatus for beamforming in a wireless communication system are provided. The method of supporting beamforming in a wireless communication device includes detecting a direction change of the wireless communication device while communicating with a peer device. The method of supporting beamforming in a wireless communication device also includes adjusting a beam direction for communication with the peer device based on information indicating a direction change of the wireless communication device.

Abstract: There is provided an information processing apparatus including a satellite positioning unit, an environment information acquiring unit, a reception information acquiring unit and an operation condition setting unit. The satellite positioning unit performs positioning based on a positioning signal received from a positioning satellite. The environment information acquiring unit acquires environment information unique to a current location. The reception information acquiring unit acquires reception information indicating a state of the positioning signal at the current location based on the environment information The operation condition setting unit sets an operation condition of the satellite positioning unit based on the reception information.

Abstract: Various embodiments are described that relate to radio beamforming waveform transmission. Transmission can occur, for example, in three manners. The first manner is time-based where waveform transmission is staggered at the same frequency. The second manner is frequency-based where different frequencies are used at one time. This third manner is a combination of time and frequency such that simultaneous transmission occurs, but at different times different frequencies are used.

Abstract: A method is performed by a first communication device for directing an antenna beam based on motion. The method includes directing an antenna beam in a first direction. The method further includes receiving motion data that indicates movement of the first communication device or a second communication device. Moreover, the method includes determining, based on the motion data, a change in direction of the antenna beam from the first direction to a second direction toward the second communication device.

Abstract: A ranging and tracking system and method employs a Coherent Array Reconciliation Tomography (CART) approach that benefits from a series of samples gathered from deployed receivers in an area of interest, and applies a sequence of matrix operations and transformations to data defining locations in a Cartesian grid space for summing constructive characteristics in a received waveform for identifying a leading edge indicative of a time of arrival (TOA) from a signal source, and computing a metric based on the distance to the signal source. Sampled waveform information (data) from multiple locations in the area of interest allows computation of a likelihood metric for each location in the grid space of containing the signal source. Rendering of the grid space location having the highest likelihood metric illustrates a position of the signal source, and may be graphically depicted clustering of the locations depicting a high likelihood.

Abstract: A signal processing method for ultra-fast acquisition and tracking of severely attenuated spread spectrum signals with Doppler frequency and apparatus thereof are disclosed herein. The signal processing method may include a step of searching for at least one receiving signal from Global Navigation Satellite System (GNSS) positioning signals or Spread Spectrum signals in a signal processing device, wherein the step of searching for at least one received signal includes a sparse Doppler frequency search (SDFS) step performing signal search for respective sparse Doppler frequencies being spaced apart from one another by a first interval, and a synthesized Doppler frequency testing (SDFT) step performing signal search for respective synthesized Doppler frequencies being spaced apart from one another by a second interval between the sparse Doppler frequencies, the second interval being shorter than the first interval.

Abstract: Systems and methods for improved Global Positioning System (“GPS”) function employ two multiband, multiport antennas to receive GPS signals. The antennas also serve WiFi frequencies, and the system utilizes the received WiFi signal strength to correct the GPS reception pattern for detuning due to user contact or other factors. The correction is made via selective combination of the GPS signals from the antennas. In addition, a phase shifter in one of the signal paths is used to account for changes in device orientation and to maximize the upper hemisphere component of the GPS reception pattern.

Abstract: A DS-SS radar 10 detects an object in such a way that a code generator 21, an oscillator 32, and an antenna 24 repeatedly send a sending signal modulated with a predetermined-frequency code generated by the code generator 21, an A/D converter 45 samples the code, included in the reflected wave of the sending signal reflected by an object, with a sampling period lower than the period of the code, and a correlator 46 calculates the correlation between the reference code, generated by re-arranging the code from the code generator 21 at an interval of Nsp, and the sampling data converted by the A/D converter 45.

Abstract: The present invention relates to the field of communications technologies, and discloses a beam tracking method, apparatus, and system, so as to ensure rapid discovery and to switch from an optimal link to a backup link in time, or switch from a backup link to an optimal link, thereby effectively improving a throughput of a system link. The beam tracking method includes: transmitting, by a beam tracking initiator, a beam tracking request to a beam tracking responder; receiving, by the beam tracking initiator, an enhanced beam tracking training auxiliary sequence transmitted, according to the enhanced beam tracking request, by the beam tracking responder; and when it is determined according to a reception detection result of the enhanced beam tracking training auxiliary sequence that it is necessary to switch to a backup beam link, transmitting, by the beam tracking initiator, first link switching information to the beam tracking responder.

Abstract: A method of determining a position of a GNSS receiver includes: receiving, at the GNSS receiver, information from at least two GNSS satellites and an estimated location area from a non-GNSS positioning application, determining candidate pseudoranges corresponding to candidate correlation peaks determined based on the information received from the at least two GNSS satellites; determining possible positions of the GNSS receiver using the candidate pseudoranges and the estimated location area; determining a best possible position of the GNSS receiver from the possible positions; and setting the best possible position as the position of the GNSS receiver; wherein when multiple candidate correlation peaks corresponding to one of the at least two GNSS satellites are determined, the estimated location area is usable to reduce the number of candidate correlation peaks prior to candidate pseudoranges being determined.

Abstract: An FMCW (frequency modulated continuous wave) radar apparatus is provided. The apparatus transmits a transmission signal that includes a first frequency-rise time period whose frequency sequentially rises with a first modulated gradient, a first frequency-fall time period whose frequency sequentially falls with the first modulated gradient, a second frequency-rise time period whose frequency sequentially rises with a second modulated gradient different from the first modulated gradient, and a second frequency-fall time period whose frequency sequentially falls with the second modulated gradient. In the apparatus, frequencies of a plurality of peaks are specified in respect of each of beat signals obtained in response to the transmission.