Sirf Technology, Inc.

Csr Technology Inc.

Matsushita Electric Works, Ltd.

Other

Panasonic Corporation

Sirf Technology Holdings, Inc.

Csr Technology Holdings Inc.

Sirf Technologies, Inc.

Ashutosh Pande

Lionel Jacques Garin

Gengsheng Zhang

Kanwar Chadha

Gregory Turetzky

Chiayee Steve Chang

Junichi Suzuki

Stefan Witanis

Nikola Bulatovic

Clifford Yamamoto

Sebastian Nonis

Nicolas Patrick Vantalon

Leon Kuo-Liang Peng

Steve Chang Chiayee

Ikuo Tsujimoto

Steve Chang

Randall J Silva

Kurt Christian Schmidt

Hemali Vyas

Arun Kumar

Steven A Gronemeyer

Mahesh Chowdhary

Daniel Babitch

Mahaveer Jain

Anthony James Orler

Qiyue Zhang

Lars Boeryd

Manish Sharma

Kolin Paul

Gagan Narula

Chinmay Agarwal

Lionel Jacques Gerin

Methods and systems consistent with the present invention provide a host based positioning system. The host based positioning system includes a tracker hardware interface that connects to a dedicated hardware space vehicle tracker. The tracker hardware interface receives positioning information from the space vehicle tracker. The host based positioning system also includes a memory that includes a GPS library having a user interface, a tracker interface, and an operating system interface. A processor runs functions provided by the interfaces.

Host based satellite positioning systems

A protocol independent interface for processing, within a mobile device, protocol aiding data received at a call processor with a Global Positioning System ('GPS') interface, where the protocol aiding data is produced according to a Geolocation Server Station protocol is disclosed. The protocol independent interface may include a means for receiving, at the GPS interface, the protocol aiding data received at the call processor, means for converting the received protocol aiding data to interface data that is transparent to the Geolocation Server Station protocol, and means for passing the interface data to a GPS module.

Interface for a GPS system

Methods and apparatuses for estimating a user's altitude with respect to the mean sea level are provided. According to some aspects, the present invention is able to estimate altitude in both open sky as well as in degraded GPS signal environments such as dense urban canyon environments where GPS performance is affected by fewer available satellites and/or multipath error. According to other aspects, the present invention uses data from a pressure sensor to estimate altitude, either with or without the use of GPS aiding data. According to further aspects, estimated altitude is integrated with other types of dead reckoning data to provide user context detection pertaining to changes of altitude.

Methods and applications for altitude measurement and fusion of user context detection with elevation motion for personal navigation systems

A shuttle message that is passed between GPS enabled devices that is processed at either a bit level or word level with data that the GPS enable device has already gathered and augmenting the positioning data stored at GPS enabled devices by retrieving data contained in the shuttle message. The shuttle message is then passed with any updated information from a GPS enabled device to one or more other devices such as a mobile station.

Distributed data collection of satellite data

The present invention discloses a GPS system that uses call-processor intelligence to determine the mode of operation of a GPS receiver located in a GPS terminal. The modes are selected based on the availability of network facilities, the GPS information that can be acquired, or user input requirements.

GPS-based positioning system for mobile GPS terminals

A system is described that utilizes the measured characteristics of a cell site or a plurality of cell sites () and the cellular identification to selectively provide a wireless device () with location aiding from a cellular network server (). The system may include a basestation () located within the cell site, a cellular measurement unit located in the wireless device (), and a database () containing positional assistance information corresponding to the characteristic information. The system may also include a processing unit in signal communication with the basestation and the database () and a positional determination unit in the wireless device ().

System of utilizing cell information to locate a wireless device

In a method for providing location-based information over a network, a plurality of GPS reference data sets, corresponding to a plurality of respective local areas, are acquired at intervals such that each GPS reference data set is updated on a continuous basis. A plurality of aiding data sets are generated at intervals based on the respective GPS data sets, whereby each aiding data set is updated on a continuous basis. The generated aiding data sets are stored at intervals on a data-storing network server, whereby updated aiding data sets are available on a continuous basis for access by a requesting entity via communication with the data-storing network server.

System and method for providing location based services over a network

An Aided Location Communication System ('ALCS') is described that may include a geolocation server and a wireless communication device having a GPS section where the GPS receiver section is capable of being selectively switched between a standalone mode and at least one other mode for determining a geolocation of the wireless communications device. An Aided Location Communication Device ('ALCD') is also described. The ALCD includes a position-determination section having a GPS receiver and a communication section where the position-determination section is selectively switchable between a GPS-standalone mode and at least one other mode for determining a geolocation of the ALCD.

Aided location communication system

The present invention discloses a system for determining the position of a GPS terminal. The system comprises a GPS terminal, a location aiding server, and a communications system. Messages are passed between the GPS terminal and the server, as well as within the GPS terminal, to determine the mode of operation of the GPS portion of the system. Decisions are made based on availability of aiding data and Quality of Service requirements.

Mode determination for mobile GPS terminals

A frequency phase correction system and method are described that provides a receiver with a greater ability to lock onto relatively weak radio frequency signals by determining and estimating an amount of frequency error in a local frequency reference of the receiver, and using the error estimate to maintain frequency coherence with a received signal, thereby allowing tracking over a longer period of time, enabling longer integration times to capture weaker signals without losing frequency coherence.

Frequency phase correction system

Methods and systems consistent with the present invention provide a host based positioning system. The host based positioning system includes a tracker hardware interface that connects to a dedicated hardware space vehicle tracker. The tracker hardware interface receives positioning information from the space vehicle tracker. The host based positioning system includes a layered approach to enable user applications on a host computer to access data from tracker hardware.

Layered host based satellite positioning solutions

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San Jose, CA, United States of America

Ashutosh Pande