Motorola Corporation

Other

Motorola Mobility LLC

United States of America As Represented by the Secretary of the Air Force

General Dynamics Advanced Information Systems, Inc.

General Dynamics Decision Systems, Inc.

Sirf Technology, Inc.

Google Technology Holdings LLC

Thomas Michael King

George Jeffrey Geier

Yilin Zhao

Robert Harbour

Sam M Daniel

Troy L Strother

Mark Heng

Howard L Kennedy

Jeffrey J Ogren

Roger Charles Hart

James Stephen

Ravikiran Nory

Christopher N Kurby

Wayne W Ballantyne

Noshir Behli Dubash

Gerald J Gutowski

Andrew Paul Hoover

Douglas W Schucker

David B Murray

William P DeClerck

Xiang Yuan

Denise Carol Riemer

Cary Richard Champlin

Rodney Landers

Stephen John Sheard

Michael Joseph Slade

William James Walsh

Issac N Durboraw, Iii

Sayfe Kiaei

Paul DeClerck

Alan Chang

Jason Remillard

Greg Luneau

Edward Dean Berry

Jeffrey Jerome Ogren

Thomas Ricks

Wayne Wiggins Ballantyne

David K Murray

A global positioning system (GPS) receiver that is configured to rapidly acquire GPS signals in space applications and a method for rapidly acquiring GPS signals in space applications is disclosed. In an embodiment, the GPS receiver includes, but is not limited to, a GPS signal acquisition component. The GPS signal acquisition component is adapted to acquire a GPS signal by receiving data from the GPS signal and processing the data to detect the GPS signal.

Method and apparatus for rapid acquisitions of GPS signals in space applications

A method for eliminating or reducing interference in a receiver, for example, interference in a satellite positioning system receiver caused by a co-located TDMA transmitter, including detecting () the presence of a jamming signal, generating a synchronous blanking signal (), and reducing the jamming signal by blanking () the receiver with a blanking signal. In one embodiment, the jamming signal is detected in the receiver, for example, at a correlator output of a satellite positioning system receiver.

Detection and reduction of periodic jamming signals in GPS receivers and methods therefor

A satellite positioning system receiver programmed to determine information for a satellite using ephemeris data (), determine information for the same satellite using almanac data (), which may have been previously stored on the receiver, to determine an error between the satellite information determined from the ephemeris data and the satellite information determined from the stored almanac data (), and to update the stored almanac data based upon the error ().

Satellite positioning system receivers and methods

GPS assistance message and data issue identifiers for transmission to GPS enabled mobile stations in cellular communications networks and methods therefore. The GPS data issue identifiers indicate whether GPS data, for example corresponding ephemeris and almanac data, stored at the mobile station requires updating. In the exemplary 3generation (W-CDMA/UMTS) architecture, the GPS assistance message is a System Information Block (SIB), and the GPS ephemeris data identifier and corresponding satellite identifier is encoded in a value tag included in a Master Information Block (MIB).

GPS assistance messages in cellular communications networks and methods therefor

An assisted global positioning satellite (Assisted GPS) system has a GPS reference network node () that collects GPS satellite broadcast messages and prepares separate GPS assistance messages to be modulated by a base transceiver station (BTS) () on a cellular carrier signal () and sent to single or multiple handset (). In a first preferred embodiment, instead of the handset () receiving standard ephemeris and clock correction data elements in a GPS assistance message, a compressed GPS assistance message containing XYZ information contains a GPS satellite's coordinate position modified according to the satellite clock correction. In a second preferred embodiment, there is a first type of compressed GPS assistance message containing subframe 1, 2, 3 data of a GPS satellite broadcast message and a second type of compressed GPS assistance message containing subframe 4, 5 data of a GPS satellite broadcast message. The compressed GPS assistance messages according to the second preferred embodiment lack redundant or predictable information in order to reduce the size of the compressed GPS assistance message. The first type can be updated at a different rate than the second type in order to reduce the traffic and yet keep the handset () up to date.

Method and apparatus for compressing GPS satellite broadcast message information

A method in a satellite positioning system receiver, including acquiring () a set of satellite positioning system satellites, determining () satellite subset time based on over-determined position solutions for at least two different subsets of the satellites acquired, determining () satellite time from at least two satellite subset times, computing () a position solution based on the satellite time or a refined () satellite time.

Satellite positioning system receiver time determination in minimum satellite coverage

A reconfigurable downconverter () for a multi-band positioning receiver is operable with an RF synthesizer () with fixed output frequency, and a fixed wideband RF input (). The downconverter () includes an RF mixer () operable to accept a range of frequencies that encompass the GPS and Galileo frequency bands and to output a downconverted IF signal (). A fixed frequency local oscillator signal () is coupled to the RF mixer (). At least one IF processorfurther downconverts the downconverted IF signal () to at least one baseband signal (). At least one of the IF processors () is reconfigurable for different frequency bands.

Reconfigurable downconverter for a multi-band positioning receiver

A method () and an apparatus () for a wireless portable communication device () for determining coarse position information are provided. The wireless portable communication device () receives information about a plurality of visible satellites (), and determines a coarse position of the wireless portable communication device () and uncertainty parameters expected at the coarse position, using the determined coarse position and uncertainties to acquire satellites.

Method and apparatus for initializing an approximate position in a GPS receiver

A satellite positioning system receiver having a battery, wherein the receiver is programmed to determine () whether the receiver is connected to a power supply other than its battery, to begin continuous reception () of satellite positioning system navigation data when the receiver is connected to a power supply other than its battery, and to store () the navigation data received in memory of the receiver.

A satellite positioning system receiver programmed to operate synchronously with an expected time of arrival of information from at least one satellite of a satellite positioning system, and to receive the information from the at least one satellite when the receiver is operating during the expected time of arrival of the information. In one embodiment, the receiver operates synchronously with an expected arrival of specific subframe information from at least one satellite of a satellite positioning system, and receives the specific subframe information when the receiver is operating.

A method in a mobile satellite positioning system receiver operating in cold-start mode, including searching for and detecting () a first satellite in a constellation of orbiting satellites, searching () for a second satellite based on detection probability information for non-detected satellites, the detection probability information obtained using information about one of satellites not detected or the first satellite detected. In one embodiment, the detection probability information is based on a measure of range between the non-detected satellites and the first satellite detected, and in another embodiment the detection probability information is based on a measure of angle between the non-detected satellites and the first satellite detected.

Navigation satellite acquisition in satellite positioning system receiver

A cellular network protocol that maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolates the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.

Method and apparatus for assisted GPS

A multiple channel receiver () includes a communications receiver synthesizer () and at least one numerically controlled oscillator (NCO) () that produce local oscillator signals that are derived from a common reference oscillator (). A DSP () and CPU () perform automatic frequency control (AFC) by adjustment of the reference oscillator () based upon a signal received by a receive channel using the local oscillator signal produced by the communications receiver synthesizer (). The CPU () also provides a synchronous indication of adjustments to the reference oscillator () to control circuitry for the at least one NCO () so that the configuration of the NCO () can be altered so as to maintain a substantially constant frequency output during the adjustment of the reference oscillator ().

Automatic frequency control processing in multi-channel receivers

A method in a satellite positioning system (SPS) receiverincluding acquiring a plurality of at least two SPS signals, estimating frequency error for each of the plurality of SPS signals, and compensating for the frequency error of each of the plurality of SPS signal based on the estimated frequency errors for all of the plurality of SPS signals.

Frequency error tracking in satellite positioning system receivers

A method in a location enabled mobile wireless receiver having an oscillator, including determining a change in cellular network based frequency error of the oscillator (), based on a difference () between a cellular network based frequency error of the oscillator and a reference cellular network based frequency error () of the oscillator, determining a first frequency error of the oscillator by summing () a reference satellite positioning system receiver based oscillator frequency error () with the change in cellular network based frequency error of the oscillator.

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Tempe, AZ, United States of America

Thomas Michael King