Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7924219 | Positioning method, program, positioning device, and electronic apparatus A positioning method includes: determining a receiving environment of a satellite signal from a positioning satellite; predicting a state vector including a position of a positioning device and a velocity of the positioning device based on the satellite signal; pred... | 04/12/2011 |
| 7825854 | System and method for compensating for temperature effects on GPS transponders A GPS transponder system incorporating a phase error monitoring and compensation subsystem. The phase error monitoring and compensation subsystem includes a demodulator subsystem that demodulates modulated carrier signals being output from each one of a pair of GPS ... | 11/02/2010 |
| 7773034 | Method for acquisition of GPS signals and GPS receiver with sample time error and frequency offset compensation Embodiments of a method for acquisition of GPS signals and a GPS receiver with sample time error and frequency offset compensation are generally described herein. Other embodiments may be described and claimed. In some embodiments, GPS signals are resampled at a plu... | 08/10/2010 |
| 7764224 | Advanced spoofer mitigation and geolocation through spoofer tracking A GPS receiver employing advanced spoofer mitigation, geolocation and tracking capabilities through the use of a utility channel coupled in parallel to a tracking channel. The tracking channel tracks the direct signal while the utility channel tracks one or more spo... | 07/27/2010 |
| 7750843 | Weak signal acquisition A method for acquisition of a weak signal from a satellite in the presence of a strong interfering signal from another satellite is disclosed. The method encompasses identifying the auto-correlation peak due to the weak satellite signal from the cross correlation pe... | 07/06/2010 |
| 7741995 | Method of acquiring error correction value of reference frequency, terminal device, and recording medium A terminal device receives satellite signals from a plurality of satellite positioning system (SPS) satellites and locates a position. The terminal device periodically calculates a first drift df1 of a local oscillator using a reference frequency Hr, calculat... | 06/22/2010 |
| RE41382 | Method and system for detecting interference for global positioning systems A method and system for detecting GPS interference is disclosed. In one exemplary embodiment, a method for detecting interference in a Global Positioning System comprises the steps of receiving at least one satellite signal from one or more satellites in a Global Po... | 06/22/2010 |
| 7741994 | Ionospheric error prediction and correction in satellite positioning systems A GPS server capable of receiving information for use in determining ionospheric errors using mathematical formulas and sending ionospheric error correction information to GPS receivers that are in a location capable of receiving the ionospheric error correction inf... | 06/22/2010 |
| 7737887 | Nudged broadcast orbit drift correction In method of correcting for drift in a Global Navigation Satellite System (GNSS) receiver, a broadcast orbit in use at the GNSS receiver is nudged based on a first message received from a GNSS base station. The nudging creates a first nudged broadcast orbit for a GN... | 06/15/2010 |
| 7733268 | Method and apparatus for determining the geographic location of a device A method and apparatus for determining the location of a device from signals provided by a plurality of satellites. A device receives a first plurality of signals comprising one signal from each of a first plurality of satellites and determines a first location of t... | 06/08/2010 |
| 7724184 | System and method for detecting false navigation signals A system and method for detecting and excluding false GPS signals are disclosed, which predict a GPS measurement value with a high degree of confidence, compare the predicted value with measured values, and reject a false measurement based on the comparison results.... | 05/25/2010 |
| 7705775 | Method of improving a vehicle emergency call network A method of improving a vehicle emergency call network used during an enhanced 911 call, which is especially useful in environments having degraded GPS signals. The present method utilizes an independent position enhancement algorithm, such as a dead reckoning algor... | 04/27/2010 |
| 7692578 | GNSS signal processing with clock difference modeling Three new methods are presented to improve floating solutions and ambiguity resolution for multiple global satellite navigation systems (GNSS), one of which may be an FDMA-based GNSS such as GLONASS: (1) modeling of the hardware-related differential clock error betw... | 04/06/2010 |
| 7692577 | Method and apparatus for geolocation determination The disclosure relates to method and apparatus for geolocation determination. In one embodiment, the disclosure relates to a method for detecting an erroneous satellite measurement by a receiver, including the steps of (a) determining an approximate location of the ... | 04/06/2010 |
| 7688259 | Positioning device, method of controlling positioning device, and recording medium A positioning device, which locates a position based on satellite signals which are signals from positioning satellites, includes a position holding section which holds a reference position P, a stationary condition determination section which determines whether or ... | 03/30/2010 |
| 7679552 | System for standard positioning service and precise positioning service cooperative operation A system for standard positioning service (SPS) and precise positioning service (PPS) cooperative operation is disclosed. In one embodiment, a PPS receiver is utilized to process a PPS data portion of a positioning signal. In addition, an SPS receiver is utilized to... | 03/16/2010 |
| 7679553 | Adjusting GPS communication with a wireless device Adjusting the GPS fix frequency of a wireless device is described. For example, a computer-implemented method according to one embodiment comprises: attempting GPS fix operations on a wireless device according to a first schedule; detecting one or more unsuccessful ... | 03/16/2010 |
| 7679551 | Methods and systems for doppler frequency shift removal and correlation for software-based receivers Embodiments of the invention provide a method for effecting Doppler removal and correlation for software-based receivers. For one embodiment of the invention Doppler removal is performed concurrently for all received communications signals. For one embodiment of the... | 03/16/2010 |
| 7671790 | Positioning system, positioning device, communication base station, control method, and recording medium storing program A communication base station includes a propagation time evaluation section which determines whether or not a propagation time required for a communication radio wave to propagate between the communication base station and a positioning device is within a predetermi... | 03/02/2010 |
| 7663539 | Automatic decorrelation and parameter tuning real-time kinematic method and apparatus A method of and computer-readable medium containing instructions for high accuracy, reliable position determination. The ADAPT-RTK Technology (Automatic Decorrelation and Parameter Tuning Real-Time Kinematic technology) is described using an innovative decorrelation... | 02/16/2010 |
| 7656348 | System and/or method for determining sufficiency of pseudorange measurements The subject matter disclosed herein relates to a system and method for determining a sufficiency of measurements for locating positions. In one example, although claimed subject matter is not so limited, a process to improve accuracy of pseudorange measurements may ... | 02/02/2010 |
| 7646336 | Automated asset positioning for location and inventory tracking using multiple positioning techniques A system and method is provided for tracking and maintaining a highly accurate inventory of shipping containers that are stored within container storage facilities. The invention includes using multiple complementary real-time and post-processing positioning techniq... | 01/12/2010 |
| 7642954 | Positioning apparatus, control method of positioning apparatus, control program for positioning apparatus, and computer-readable recording medium having control program for positioning apparatus recorded therein A positioning apparatus that measures a current position by using measurement basis codes carried on satellite waves from a plurality of positioning satellites includes: a first phase error information generating unit that generates first phase error information ind... | 01/05/2010 |
| 7633436 | Satellite-based positioning of mobile terminals The invention relates to satellite-based positioning of mobile terminals. Positioning with correction for errors in parameters measured at the mobile terminal is provided. The terminal location is first calculated (S2; S4′) without error correction o... | 12/15/2009 |
| 7629924 | Methods and apparatus for obtaining accurate GNSS time in a GNSS receiver A method for obtaining GNSS time in a GNSS receiver includes: deriving a relationship between a first clock signal and the received GNSS time; latching a second clock signal and the first clock signal at a first latching point to obtain a clock value A1 of th... | 12/08/2009 |
| 7629923 | Method and device for storing economically auxiliary correction data applied in global navigation satellite system A method applied in a Global Navigation Satellite System (GNSS) for minimizing storage of correction data is disclosed. The method comprises: determining the receiver position and satellite positions; determining a intermediate point according to the receiver positi... | 12/08/2009 |
| 7626539 | Method and apparatus for managing time in a satellite positioning system A method, apparatus and system for time management in a position-location system is described. The method may include (i) obtaining, at a global-navigation-satellite-system receiver while being served by a first node of a wireless network a first time base, a relati... | 12/01/2009 |
| 7623065 | Refractivity retrieval via direct measurement of GNSS bending angle A method and system for taking direct measurements of GNSS signal's arrival angle to remotely measure the atmospheric variables used for weather prediction. More specifically, an improved method and system for obtaining and processing accurate information regarding ... | 11/24/2009 |
| 7609201 | Position-verified access apparatus, method, and program product An acquisition apparatus for acquiring the positional information indicating the position of a position detecting device which, in one embodiment, detects position based on a GPS (Global Positioning System). The position detecting device measures the device distance... | 10/27/2009 |
| 7605749 | Multifrequency line biases for multifrequency GNSS receivers A differential carrier phase global navigation satellite system (GNSS) receiver with multiple antennas uses multiple GNSS carriers to determine position, which can improve the speed of integer searches, for example. In the system, an estimate of delays associated wi... | 10/20/2009 |
| 7592951 | Device and method for minimizing the number of crystal oscillators used in an integrated navigation receiver and cellphone A hybrid navigation satellite receiver and mobile telephone uses only two crystal oscillators. One that operates a master clock around 27-MHz and that consumes milliwatts of power. The other oscillator consumes only microwatts of power and operates continuously on b... | 09/22/2009 |
| 7589667 | Method and apparatus for monitoring the integrity of satellite tracking data used by a remote receiver A method and apparatus for monitoring the integrity of satellite tracking data used by a remote receiver is described. In one example, a first set of satellite tracking data is received at a server. Integrity data for a second set of satellite tracking data is gener... | 09/15/2009 |
| 7586438 | Navigation with satellite communications A Low Earth Orbiting (LEO) satellite is used for broadcasting differential navigation corrections. Using LEO satellites, the “footprint” of the beam is much smaller than for geosynchronous satellites. Datalink bandwidth requirements are reduced to sufficiently c... | 09/08/2009 |
| 7579983 | Terminal apparatus, control method for terminal apparatus, control program for terminal apparatus, and computer readable storage medium having stored therein control program for terminal apparatus A terminal apparatus including: communication means; positioning means; and reference signal supplying means for supplying a reference signal to the communication means and the positioning means, wherein the communication means includes: synchronizing purpose signal... | 08/25/2009 |
| 7576689 | Method and apparatus for controlling a frequency source A method is provided for controlling a clock for use in a frequency source. In the method a time bias is determined by determining the Accumulated Doppler Range of a signal source at different time intervals. The drift of a local clock is determined by determining t... | 08/18/2009 |
| 7570203 | Method for adjusting the integrity alert threshold in a satellite navigation system In a method for adjusting the integrity alert threshold in a satellite navigation system, an alert message for a satellite is sent when an estimated signal error of the satellite signal emitted by the satellite is greater than a defined integrity alert threshold. Ac... | 08/04/2009 |
| 7564401 | Signal inconsistency detection of spoofing Methods and apparatus relating to signal inconsistency detection of spoofing (SIDS), i.e. the use of inconsistencies in signals received at a plurality of points in space to detect spoofing. ... | 07/21/2009 |
| 7554487 | Method and system for determining time in a satellite positioning system Method and apparatus for receiving an estimate of time in a satellite signal receiver receives an estimate of time from a server and compensates for error of a clock in the satellite signal receiver using the estimate of time. The output of the compensated clock is ... | 06/30/2009 |
| 7551126 | GNSS sample processor for determining the location of an event An apparatus and method for determining a GNSS position of an event where an event capture device writes a short burst of GNSS signal samples with an approximate time into an event data file and a GNSS sample processor reads the event data file some time later for d... | 06/23/2009 |
| 7551125 | Positioning system, information supply apparatus, terminal apparatus, control method of terminal apparatus, control program for terminal apparatus and computer readable recording medium for storing control program for terminal apparatus A positioning system includes: a terminal apparatus and an information supply apparatus capable of communicating with the terminal apparatus. The information supply apparatus includes: external timing signal generating means for generating an external timing signal ... | 06/23/2009 |
