Abstract: In a position measuring method, GPS ranging data obtained at a reference station 1 and an observation station 2 is inputted to four solution calculating sections 12, RTK solutions such as a fix solution at the observation station 2 are calculated in the solution calculating sections 12 according to the RTK system, and the RTK solutions are inputted to a solution obtaining unit 13. Further, it is decided whether or not the RTK solutions include multiple fix solutions. When it is decided that the RTK solutions include multiple fix solutions, deviations between the fix solutions are determined and it is decided whether or not the deviations exceed an allowable value. When it is decided that none of the deviations exceed the allowable value, predetermined arithmetic processing is performed on the fix solutions to obtain a normal fix solution. Moreover, the solution calculating sections are sequentially restarted at predetermined time intervals.

Abstract: In a positioning system comprising a position information transmitter that transmits a position information signal containing position information indicative of a position as a signal compatible with a satellite positioning signal transmitted from an artificial satellite and a communication terminal that when receiving the satellite positioning signal, finds a current position of the communication terminal by finding a position of the artificial satellite and that when receiving the position information signal, finds a current position of the communication terminal based on the position information, the position information transmitter transmits the position information signal containing a boundary flag that determines which of the satellite positioning signal or the position information signal each of correlators of the communication terminal is to receive, and the communication terminal sets which of the satellite positioning signal or the position information signal each of the correlators is to receive ba

Abstract: Systems and methods for distance and location tracking a wireless device are disclosed. More specifically, according to one aspect of the present disclosure, a Wireless Area Network-Location Based Services (WAN-LBS) algorithm that utilizes a hybrid Wireless Area Network (WAN) and Global Positioning System (GPS) circuit board and method for seamless indoor and outdoor tracking is disclosed. The WAN-LBS algorithm, in conjunction with the hybrid WAN/GPS circuit board, optimizes the degrees of precision and accuracy for distance measurements in locating a fixed or mobile IEEE 802® device. In one embodiment, the hybrid WAN/GPS circuit board according to the present disclosure integrates the data of a GPS receiver and several IEEE 802 standards based receivers. In another embodiment, the WAN-LBS algorithm according to the present disclosure utilizes received data, acquired by the hybrid circuit board, to calculate distances to the tracking devices, seamlessly in both indoor and outdoor environments.

Abstract: A method and system for locating and positioning using broadcast frequency modulation (FM) signals, is provided. One implementation involves receiving FM stereo signals from three FM stations at one or more receivers, each stereo signal including a modulated 19 KHz FM pilot tone; and determining a geographical position at each receiver based on the phase difference of the demodulated pilot tones in the received FM signals.

Abstract: A practical method for adding significant new high-performance, tightly integrated Nav-Com capability to any Global Navigation Satellite System (GNSS) user equipment, such as GPS receivers, requires no hardware modifications to the existing user equipment. In one example, the iGPS concept is applied to a Defense Advanced GPS Receiver (DAGR) and combines Low Earth Orbiting (LEO) satellites, such as Iridium, with GPS or other GNSS systems to significantly improve the accuracy, integrity, and availability of Position, Navigation, and Timing (PNT)—in some cases by three orders of magnitude, to enable high precision GNSS carrier phase observable to be more readily exploited to improve PNT availability—even under interference conditions or occluded environments, and to enable new communication enhancements made available by the synthesis of precisely coupled navigation and communication modes.

Abstract: To maintain the safety by avoiding deterioration in the positioning accuracy through making SBAS satellite navigation data used in a ground system and in an airborne system consistent by employing GBAS. The system includes: a ground system which estimates errors contained in ranging signals received from the navigation satellites, and formats and transmits correction information for correcting the estimated errors; and an airborne system which calculates differential GPS positioning based on the ranging signals received from the navigation satellites and the formatted correction information, and displays a displacement from a regulated route. The ground system notifies update, when SBAS satellite navigation data used for generating the correction information is updated, by adding information regarding update of navigation data to the correction information.

Abstract: A method of collecting information for supplementing a trusted estimate of position. The method comprises: receiving first information sufficient to derive a trusted estimate of a first position; receiving an indication that a supplementary estimate of a second position in the vicinity of the first position may be required; in response to the indication, sensing information comprising the identity of at least one terrestrial wireless source observable in the vicinity of the first position; and storing the sensed information in association with the first position. The method enables the trusted estimate of the first position to subsequently be used to estimate any said second position from which the at least one wireless source is observable.

Abstract: Systems and methods according to various embodiments provide for navigation in attenuated environments by integrating satellite signals with Internet hotspot signals. In one embodiment, a receiver unit adapted to perform geolocation comprises an antenna adapted to receive a precision time signal from a satellite and receive additional aiding information from a wireless network station, wherein the precision time signal comprises a periodic repeating code.

Abstract: Embodiments provide systems, devices, and methods for determining acquisition guard times and acquisition control parameters or distance metrics for terminals in a satellite communication network using triangulation and single terminal ranging. A terminal or multiple terminals from the network may be selected as ranging terminals; the terminals may include normal user terminals used for determining a satellite position or a satellite distance. Ranging terminals may first enter a network and synchronize to TDMA frame timing by adjusting the acquisition control parameters. An adjusted acquisition control parameter may also be called a transmit timing control parameter. A satellite position or a distance difference between a real-time and a nominal satellite position may be estimated from timing control parameters.

Abstract: Method and apparatus for a GPS device that uses at least one cellular acquisition signal is described. More particularly, a GPS device is configured to receive at least one cellular acquisition signal for obtaining benefits associated with AGPS with only a small subset of AGPS circuitry to interact with a cell phone network. This facilitates use of GPS devices without subscription to a cell phone service provider, thus avoiding cellular subscription fees.

Abstract: A global positioning system (GPS) receiver receives signals from at least three or more high-definition television (HDTV) transmitters at HDTV transmitting power and frequency bands. The GPS receiver includes dynamic reconfigurable logic hardware to decode data patterns (i.e., dynamic algorithm patterns) in the received signals to compute and/or identify GPS receiver's physical location.

Abstract: A method for upgrading GNSS equipment to improve position, velocity and time (PVT) accuracy, increase PVT robustness in weak-signal or jammed environments and protect against counterfeit GNSS signals (spoofing). A GNSS Assimilator couples to an RF input of existing GNSS equipment, e.g., a GPS receiver, and extracts navigation and timing information from available RF signals, including non-GNSS signals, or direct baseband aiding, e.g., from an inertial navigation system, frequency reference, or GNSS user. The Assimilator fuses the diverse navigation and timing information to embed a PVT solution in synthesized GNSS signals provided to a GNSS receiver RF input. The code and carrier phases of the synthesized GNSS signals are aligned with those of actual GNSS signals to appear the same at the target receiver input. The Assimilator protects against spoofing by continuously scanning incoming GNSS signals for signs of spoofing, and mitigating spoofing effects in the synthesized GNSS signals.

Abstract: In a method for construction equipment component location tracking, a wireless mesh network communication is initiated between a component monitor and a component information unit which is mechanically coupled with the component. An identity of the component is received at the component monitor via the wireless mesh network communication. A Global Navigation Satellite System (GNSS) receiver of the component monitor is utilized to ascertain a location of the component at a completion of an inventory action.

Abstract: A spoofer location system includes a number of receivers that receive positioning signals. A data engine receives information from the receivers and determines a location of a spoofer source signal. The location of the spoofer source signal is determined by determining a range from each of the number of receivers to the source. The system can be employed in a global positioning system. The spoofer location system can be utilized with guided munitions and other vehicles.

Abstract: Provided is a position information providing system which can reduce a time required for acquiring position information. An indoor transmitter is adapted to provide position information by using a second positioning signal compatible with a first positioning signal which is a spread spectrum signal from each of a plurality of satellites. The indoor transmitter includes an EEPROM which stores therein position data for identifying an installation location thereof, an FPGA operable to generate a second positioning signal including the position data as a spread spectrum signal, and a transmitting section operable to transmit the spread spectrum signal. The second positioning signal is generated to repeat the same content in a cycle shorter than that of the first positioning signal.

Abstract: A power-saving position tracking device includes a central processing unit; a short-distance wireless communication unit, for establishing a wireless connection with a short-distance wireless transceiver to perform a position tracking; a GPS receiving unit, for receiving a satellite signal for performing a position tracking and outputting position information; a mobile communication unit, for transmitting the position information to a remote control center. If a signal intensity of a wireless connection between the power-saving position tracking device and the short-distance wireless transceiver is greater than a threshold, the GPS receiving unit and the mobile communication unit will enter into a power saving mode; on the other hand, if the wireless connection signal intensity is smaller than the threshold, the short-distance wireless communication unit will enter into the power saving mode to achieve the power-saving effect.

Abstract: There is a need for providing a content to a user in process of a voice call without interrupting the conversation. A presence server is provided to manage positions, in a virtual space, of a user of each of voice telecommunication terminals and an advertisement sound source provided by an advertisement server. A media server applies a stereophonic process to voice data for each of the other voice telecommunication terminals correspondingly to a relative position between a user of each of the other voice telecommunication terminals and a user of the relevant voice telecommunication terminal. Further, the media server applies a stereophonic process to acoustic data for the advertisement sound source correspondingly to a relative position between the advertisement sound source and a user of the relevant voice telecommunication terminal. In this manner, stereophonically processed data is synthesized to generate voice call data for the relevant voice telecommunication terminal.

Abstract: Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device can quickly determine its relative and/or coordinate position based on information provided by an access point in the WLAN. Before a wireless device disassociates with the access point, the WLAN can periodically provide time, location, and decoded GPS data to the wireless device. In this manner, the wireless device can significantly reduce the time to acquire the necessary GPS satellite data (i.e. on the order of seconds instead of minutes) to determine its coordinate position.

Abstract: Methods and Apparatuses are provided for selectively specifying a mode of operation of a navigation radio within a device based, at least in part, on at least one operative condition associated with at least one other radio within the device.

Abstract: This invention is a wireless mobile indoor/outdoor tracking system. It is designed to track the absolute position of all nodes in a network indoors and outdoors. The system uses GPS positioning when a signal is available and RF ranging when it is unavailable. When indoors, a minimum of three network nodes must receive a GPS signal to determine absolute position. A mesh network is used to make the system mobile and to create an avenue for data to be transmitted to a remote base station.

Abstract: A road toll system comprising a vehicle-mounted unit having a satellite navigation receiver (52) implementing a position tracking function. The system further comprises means for determining the routes taken by the vehicle based on the position tracking information and a sensor (54,56,57,58,60,61,62) for detecting a local vehicle condition which is independent of the satellite navigation signals, and which local vehicle condition is dependent on the absolute position of the vehicle or a change in the position of the vehicle. The authenticity of the position tracking information is validated using the sensor information. This system uses a satellite navigation receiver to enable infrastructure-free road tolling to be implemented. The system further provides a way of preventing a so-called fake GPS attack, i.e. providing false GPS data to reduce the road tolls payable. This is achieved by providing validation of the GPS position information by comparing with independent information collected by the vehicle.

Abstract: A GPS, GLONASS or Galileo receiver for radio positioning signals wherein at least a part of the computing of position related data based on radio signals received from a plurality of space vehicles is carried out by a graphics or sound processor. The receiver thus makes use of available computing resources, thus achieving a lower bill of material.

Abstract: A system for, and method of, blending (or integrating) pseudo-range or position measurements and bearing-to-transmitter measurements from an eLORAN or LORAN-C receiver and position (alternatively, pseudo ranges) and velocity (alternatively pseudo-range rate) measurements from a GPS receiver. The described system can also be integrated with additional external positioning systems. In the context of an inertial navigation system (INS) application, this combined GPS/LORAN signal can be employed to provide external positioning solutions, potentially integrated with measurements from devises such as accelerometers, gyroscopes, altimeters, etc. The system includes a GPS signal input, a LORAN signal input, preprocessors for each, and an integrator to combine the two preprocessed signals to estimate errors in the full trajectory variables.

Abstract: A wireless utility asset mapping device method comprises locating a utility asset, and placing a wireless utility asset mapping device over the location of the utility asset. The wireless utility asset mapping devices comprises a pole. A positioning receiver is connected to the pole. A wireless modem is connected to the pole and to the positioning receiver. At least one weatherproof housing is connected to the pole and encloses the positioning receiver and the wireless modem. A coordinate of the wireless utility asset mapping device is determined. The coordinated is wirelessly transmitted to a remote asset tracking computer.