Abstract: A method of operating an antenna system for a wireless device is provided for controlling radiation characteristics of the antenna system. The antenna system includes first and second sets of feed points disposed so that first and second radiation pattern are generated by the antenna system when drive currents are provided at the first and second set of feed points, respectively. The second radiation pattern is different from the first radiation pattern. The first and second drive currents are supplied such that a predetermined overall radiation pattern is generated. The predetermined overall radiation pattern is at least in part a combination of the first radiation pattern and the second radiation pattern. The system and method may be directed toward Specific Absorption of Radiation (SAR) mitigation.
Abstract: An approach for determining remote terminal antenna alignment in a satellite communications system is provided. A point in time for an expected conjunction of an a remote terminal antenna, a satellite in communication with the remote terminal and the Sun is determined based on predetermined positional data. An interference level imposed by the Sun on communication signals between the antenna and the satellite is measured at a number of respective points in time. A one of the points in time is determined when the interference is at a peak level. Then information regarding alignment of the antenna with respect to the satellite is determined, wherein the determination of the antenna alignment information is based on a comparison between the one point in time of the peak interference level and the expected point in time of the conjunction of the antenna, the satellite and the Sun.
Abstract: A method and apparatus for phase-mode feeding a circular antenna array for beamsteering is provided. A Butler Matrix having M antenna-side ports and M input/output ports is coupled to beamsteering circuitry. The coupled input/output ports may include a port corresponding to a phase-mode having an order magnitude greater than one. The coupled input/output ports may include ports of three different order magnitudes of phase-mode. The Butler Matrix is coupled to M inner ports of a radial waveguide, and the antenna elements are coupled to N outer ports of the waveguide, where N>M. Where M=4, the input/output ports correspond to a zeroth order phase-mode, plus and minus 1st order phase-modes, and a second order phase-mode. The zeroth order phase-mode may be used for beamsteering closer to the radial axis of the antenna array while the second order phase-mode may be used for beamsteering further from the radial axis.
Abstract: A sub-array number determinator is provided to determine a number of sub-arrays to be allocated to each of user terminals detected by a terminal position detector on a basis of relation between positions of the user terminals and a position of an antenna apparatus. An antenna selector selects sub-arrays for the number determined by the sub-array number determinator from among the sub-arrays and allocates the selected sub-arrays for the determined number to each of the user terminals. This structure is capable of preventing interference among beams for user terminals and providing excellent communication quality to the user terminals even in condition where the user terminals are adjacent to each other.
Abstract: An example disclosed method includes defining a first zone within a monitored area, a first group of receivers covering the first zone; defining a second zone within the monitored area, a second group of receivers covering the second zone; determining, via a processor, a first position of a first tag based on timing measurements obtained via the first group of receivers; determining, via the processor, whether the first position indicates that the first tag is within the first zone; and when the first position indicates that the first tag is not within the first zone, not reporting data associated with the first tag.
May 5, 2016
Date of Patent:
November 27, 2018
Aitan Ameti, Keming Chen, Robert J. Fontana, Edward A. Richley, Belinda Turner
Abstract: An array antenna forms a main beam, and the main beam is toward a beam direction. The array antenna includes a plurality of radiating elements with a plurality of central line segments, where the plurality of radiating elements are arranged along a straight line, and the straight line is connecting the plurality of central line segments; and a plurality of meanders connecting the plurality of radiating elements; where the array antenna is disposed on a first plane, the beam direction has a nonzero deviating angle with a normal direction of the first plane, and the normal direction is perpendicular to the first plane.
Abstract: A method of selecting a satellite positioning system which is used in positioning by a positioning device capable of performing positioning based on a plurality of satellite positioning systems includes acquiring given support information which is referred to in selecting a satellite positioning system, and selecting a satellite positioning system which is used in positioning from the plurality of satellite positioning systems, on the basis of the support information.
Abstract: Low-energy consumption techniques for locating a movable object using a global satellite navigation system (GNSS) are provided. A mobile station attached to or included in a movable object can communicate bidirectionally with a fixed base station to determine a location of the movable object. The mobile station may communicate an estimated position to the base station and receive from the base station a set of GNSS satellites that are visible to the mobile station. The mobile station can acquire satellite timing information from GNSS signals from the set of satellites and communicate minimally-processed satellite timing information to the base station. The base station can determine the position of the mobile station and communicate the position back to the mobile station. By offloading much of the processing to the base station, energy consumption of the mobile station is reduced.
Abstract: Various different techniques are used to determine a location of a device, including 3-dimensional (3D) mapping techniques as well as one or more of Global Navigation Satellite System (GNSS) techniques, wireless signal detection techniques, and inertial sensor techniques. The locations determined by these various techniques are combined to determine the location of the device and/or user of the device. In addition to the location of the device, an orientation or direction of view of the device and/or user of the device can optionally be determined as well.
December 24, 2012
Date of Patent:
September 25, 2018
Microsoft Technology Licensing, LLC
Peter S. Hoang, Jedd A. Perry, Rod G. Fleck
Abstract: Device (100) has: a low-speed interval extraction unit (120) for extracting, from GPS information, a low-speed interval extending from the location at a first time point at which the measured speed of a vehicle has fallen below a prescribed value, to the location at a second time point at which the speed has exceeded the prescribed value; a vehicle speed transition model generating unit (130) for generating a model having, as constraint condition, the length and the amount of time of the low-speed interval, for indicating temporal transition of the speed in such a way that the speed continuously increases to the second time point after having decreased from the first time point; and a stop determination unit (140) for determining that the vehicle has stopped within the low-speed interval, on the condition that an interval in which the speed is zero or less is present within the model.
Abstract: Systems and methods are provided for repositioning a directional antenna that responds to a desired signal and directional interference. The antenna can generate a sum beam and first and second difference beams. Respective powers of the sum beam and the first and second difference beams can be determined. At least a portion of any of the directional interference can be excised from the sum beam and the first and second difference beams. Measures of the directional interference can be determined in the sum beam and the first and second difference beams. A first correlation between the sum beam and the first and second difference beams can be generated. Additional correlations between a signal identifier and the sum beam and first and second beams monitor the desired signal reception. The antenna can be repositioned away from the directional interference based on the powers, the measures, and the first correlation.
Abstract: The present invention is directed to a system and method for providing an estimated design specification as a function of a number of spatially separated far-field measurements and a predetermined design specification. The predetermined design specification corresponds to an antenna being in a properly configured and a properly excited state. The system maps the spatially separated far-field measurements into an estimated far-field antenna pattern of the antenna based on the estimated design specification. The system provides difference data based on a comparison of the predetermined design specification and the estimated design specification and can adjust the electrical excitation signals of the antenna in accordance with the difference data or the estimated far-field antenna pattern.
Abstract: First and second antenna disposed in an information handling system selectively support communication through a wireless frequency using beamforming. The first or second antenna is selected for initiating communication based upon alignment with a beamforming axis for establishing beamforming with a distal wireless device. For example, the first antenna is selected if the information handling system articulates to a tablet configuration and the second antenna is selected if the information handling system articulates to a clamshell open configuration.
Abstract: A method for determining a location of a target includes: obtaining a plurality of guess distance values of a plurality of satellites, respectively; utilizing satellite signals received from the plurality of satellites to estimate a plurality of pseudo range values of the plurality of satellites, respectively; comparing the guess range values with the pseudo range values to generate a residual vector; and utilizing a processing unit for applying a rank-based approach based on the residual vector to generate a calculation result. The location of the target is derived from the calculation result.
Abstract: An electronic device includes: a satellite signal receiving section that receives a satellite signal with which positioning information is overlapped from a positioning satellite; a reception control section that controls driving of the satellite signal receiving section; and a detecting section that detects a state change of the electronic device, in which the reception control section allows the satellite signal receiving section to enter a driving state when the detecting section detects the state change to receive the satellite signal. According to this electronic device, it is possible to reduce a TTFF at the positioning start, and to reduce power consumption in the satellite signal reception.
Abstract: In one embodiment, the position of a mobile device is determined based, at least on part, of the relative locations of two or more nearby points. Distance data, received from a range finding sensor, corresponds to distances to the two or more nearby points from the mobile device. A predetermined model that includes previously recorded locations for objects is accessed to receive location data for two or more nearby points. A position of the mobile device is calculated based on the location data and the distance data. The nearby points may be building edges or building corners. The calculation may involve a series of equations. The series of equations may include satellite-based positioning equations in addition to equations based on the predetermined model.
February 13, 2013
Date of Patent:
June 5, 2018
HERE Global B.V.
Bishnu Phuyal, Jeffrey R. Bach, Narayanan Alwar
Abstract: A mobile terminal capable of selecting optimum satellites among a plurality of positioning satellites and a method of selecting positioning satellites are disclosed with reference to embodiments of the present invention. If DOP (dilution of precision) increases as the number of positioning satellites increases, satellites to be used for positioning are automatically selected from GNSS satellites based on satellite information and a user's menu setting. This can enhance the accuracy of positioning and can reduce battery consumption. In particular, satellites for positioning are spaced from each other by a prescribed distance to reduce DOP, thereby enhancing the accuracy of positioning. Further, multipath signals are reduced in order to enhance the accuracy of positioning.
Abstract: The invention proposes a system for excluding a failure of a satellite suitable for a hybrid navigation system and which operates even in case of degraded geometry of the constellation of satellites. The hybrid system according to the invention comprises a plurality M of hybridization filters (SFH1, . . . SFHM) each receiving at least one satellite positioning measurement (MPS) carried out on the signals received from all the satellites in visibility of the said system and an inertial positioning measurement (MPI) and delivering a corrected positioning measurement, the so-called hybrid measurement (MHS1, . . . MHSM), the hybridization filters being updated, at a constant temporal rate, successively at periodically shifted temporal instants.
Abstract: The invention relates to a disruption detection method and device for a positioning measurement correction message of a satellite geolocation device, able to receive a composite radio signal including a plurality of signals each emitted by a satellite in view of the geolocation device, and a positioning measurement differential correction message (MC) emitted by a satellite geolocation precision augmentation system. The device (20) according to the invention includes modules (32) computing, for each of the satellites in view, at least one differential correction coherence metric depending on a positioning measurement differential correction (CAS) extracted from the received differential correction message (MC). The device (20) also includes a module (34) detecting a disruption of the correction message when the number of satellites for which the differential correction coherence metric is above a predetermined threshold exceeds a predetermined number of satellites (N0), strictly greater than one.