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| Number | Title | Issue Date |
| 7672404 | Method and apparatus for reducing the time required to acquire a GPS signal A method of correlating a digital communications signal is described. In an example, a window is defined equal to a portion of an epoch of the digital communication signal. The digital communication signal is then correlated across the window. A determination is mad... | 03/02/2010 |
| 7656350 | Method and apparatus for processing a satellite positioning system signal using a cellular acquisition signal Method and apparatus for processing satellite positioning system signals is described. In one example, assistance data is received at a mobile receiver from a first wireless network using a wireless transceiver. The first wireless network may be a non-synchronized c... | 02/02/2010 |
| 7642959 | Method and apparatus for processing satellite signals at a satellite positioning system receiver Method and apparatus for processing satellite signals in an SPS receiver is described. In one example, the satellite signals are correlated against pseudorandom reference codes to produce correlation results. A determination is made whether the SPS receiver is in a ... | 01/05/2010 |
| 7640103 | Multi-function appliance for a satellite navigation data distribution system A multi-function appliance for use in a satellite navigation data distribution system is described. A computer includes an input/output interface and a memory the computer is configured with a plurality of modules. The plurality of modules includes a satellite signa... | 12/29/2009 |
| 7595752 | Method and apparatus for enhanced autonomous GPS Method and apparatus for locating position of a remote receiver is described. In one example, long term satellite tracking data is obtained at a remote receiver. Satellite positioning system (SPS) satellites are detected. Pseudoranges are determined from the remote ... | 09/29/2009 |
| 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 |
| 7567636 | Method and apparatus for performing signal correlation using historical correlation data A method and apparatus for estimating a satellite signal parameter in a satellite positioning system receiver is described. In an example, a plurality of correlation results between a satellite signal and a reference signal is generated in response to a command from... | 07/28/2009 |
| 7554934 | Method and apparatus for processing location service messages in a satellite position location system Method and apparatus for processing location service messages in a satellite position location system is described. In one example, a mobile receiver includes a satellite signal receiver, wireless circuitry, and at least one module. The satellite signal receiver is ... | 06/30/2009 |
| 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 |
| 7548816 | Method and apparatus for generating and securely distributing long-term satellite tracking information A method and apparatus for generating and distributing satellite tracking data to a remote receiver is disclosed. The method for includes extracting from memory at least a portion of long-term-satellite-tracking data, generating formatted data from the at least a po... | 06/16/2009 |
| 7447253 | Method and apparatus for processing satellite positioning system signals to obtain time information A method and apparatus for processing satellite positioning system signals at a mobile receiver is described. In one example, first bit-transitions within satellite navigation data transmitted by at least one satellite are estimated at the mobile receiver. A bit pat... | 11/04/2008 |
| 7443340 | Method and apparatus for generating and distributing satellite tracking information A method and apparatus for generating and distributing satellite tracking data to a remote receiver is disclosed. The method for includes extracting from satellite-tracking data initial model parameters representing a current orbit of at least one satellite-position... | 10/28/2008 |
| 7400974 | Method and apparatus for locating position of a GPS device A method and apparatus for locating position of a GPS device is described. In one example, a method for provisioning a mobile device with a model for determining a position of the mobile device in at least one geographic area is provided. The method includes obtaini... | 07/15/2008 |
| 7342533 | Method and apparatus for obtaining satellite trajectory data at a satellite positioning system receiver Method and apparatus for locating position of a mobile receiver is described. In one embodiment, satellite measurements are obtained at the mobile receiver for a plurality of satellites in a satellite positioning system constellation. Satellite trajectory data is ob... | 03/11/2008 |
| 7327310 | Method and apparatus for managing time in a satellite positioning system Method and apparatus for time management in a position location system is described. In one example, a time relation is received at a server. The time relation includes a relationship between an air-interface time of a base station and a satellite time for a satelli... | 02/05/2008 |
| 7254404 | Method and apparatus for processing position information in a mobile device Method and apparatus for processing position information in a mobile device is described. In one example, a request for a position to be computed within a predefined period of time is received. A plurality of positions is calculated within the predefined period of t... | 08/07/2007 |
| 7253768 | Method and apparatus for mitigating multipath effects at a satellite signal receiver using a sequential estimation filter A method and apparatus for mitigating multipath effects in a satellite signal receiver is described. The method includes computing at least one pseudorange residual as a function of (i) a measured pseudorange to a given satellite, and (ii) an expected pseudorange to... | 08/07/2007 |
| 7245255 | Method and apparatus for determining absolute time-of-day in a mobile-assisted satellite positioning system A method and apparatus for determining time-of-day in a mobile receiver is described. In one example, expected pseudoranges to a plurality of satellites are obtained. The expected pseudoranges are based on an initial position of the mobile receiver and an initial ti... | 07/17/2007 |
| 7190712 | Method and apparatus for performing signal correlation A method and apparatus for performing signal correlation is described. In one example, portions of a pseudorandom reference code are multiplied with portions of a repeating code of the digital signal to produce a plurality of inner products. The plurality of inner p... | 03/13/2007 |
| 7158882 | Method and apparatus for locating position of a mobile receiver A method and apparatus for locating position of a mobile receiver is described. In one example, sets of satellite measurements are determined with respect to a plurality of satellites over a period of time. A determination is made as to whether the mobile receiver i... | 01/02/2007 |
| 7155183 | Method and apparatus for adjusting reference oscillator frequency in a mobile wireless device A method and apparatus for using a conventional oscillator in a cellular telephone transceiver as a source of a reference signal for a GPS receiver. In one embodiment, the method comprises using a voltage-controlled oscillator (“VCXO”) within a cellular telephon... | 12/26/2006 |
| 7095370 | Method and apparatus for mitigating multipath effects at a satellite signal receiver using a sequential estimation filter A method and apparatus for mitigating multipath effects in a satellite signal receiver is described. In one example, measured pseudoranges are obtained from the satellite signal receiver to a plurality of satellites. For each measured pseudorange: an expected pseudo... | 08/22/2006 |
| 7012564 | Method and apparatus for adjusting a measurement cycle in a satellite positioning system signal receiver Method and apparatus for adjusting a measurement cycle in a satellite signal receiver is described. In one example, a notification is received at the satellite signal receiver that is indicative of at least one of a route-critical event and a motion-change event. A ... | 03/14/2006 |
| 6992617 | 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... | 01/31/2006 |
| 6975266 | Method and apparatus for locating position of a satellite signal receiver A method and apparatus for locating position of a satellite signal receiver is described in one example, groups of pseudoranges from the satellite signal receiver to a plurality of satellites are determined at a respective plurality of times. The group of pseudorang... | 12/13/2005 |
| 6958726 | Method and apparatus for adjusting acquisition assistance data received by a mobile receiver from a server Method and apparatus for adjusting acquisition assistance data received by a mobile receiver from a server is described. In one example, pseudoranges are measured from the mobile receiver to a set of satellites. Line-of-sight data is obtained with respect to the mob... | 10/25/2005 |
| 6813560 | Method and apparatus for locating mobile receivers using a wide area reference network for propagating ephemeris A method and apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers th... | 11/02/2004 |