WO2006018803A1 - Gps receiver and related method and apparatus - Google Patents

Gps receiver and related method and apparatus Download PDF

Info

Publication number
WO2006018803A1
WO2006018803A1 PCT/IB2005/052672 IB2005052672W WO2006018803A1 WO 2006018803 A1 WO2006018803 A1 WO 2006018803A1 IB 2005052672 W IB2005052672 W IB 2005052672W WO 2006018803 A1 WO2006018803 A1 WO 2006018803A1
Authority
WO
WIPO (PCT)
Prior art keywords
gps
signal samples
stream
timing data
gps signal
Prior art date
Application number
PCT/IB2005/052672
Other languages
French (fr)
Inventor
Michael D. James
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP05774442A priority Critical patent/EP1782088B1/en
Priority to US11/573,870 priority patent/US7916079B2/en
Priority to JP2007526677A priority patent/JP5101281B2/en
Priority to DE602005005340T priority patent/DE602005005340T2/en
Priority to CN2005800282223A priority patent/CN101010598B/en
Publication of WO2006018803A1 publication Critical patent/WO2006018803A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/09—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing processing capability normally carried out by the receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/35—Constructional details or hardware or software details of the signal processing chain

Definitions

  • the present invention relates to a GPS receiver comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals; and a processor for outputting the GPS signal samples.
  • the present invention further relates to a corresponding method of providing a position fix comprising the steps of receiving from a GPS receiver
  • GPS signal samples and processing the GPS signal samples to determine a position fix and to a computer program, computer-readable storage medium and apparatus for the same.
  • GPS World, July 2001 discloses "software GPS” in which much GPS signal processing is accomplished by means of a programmable micro ⁇ processor or digital signal processor as opposed to analogue or discrete hardwires components.
  • a simplified GPS receiver is provided consisting of a GPS antenna and GPS RF front-end for GPS signal pre-processing (including filtering, amplification and frequency down-conversion) and analogue to digital conversion.
  • GPS signal samples outputted from the GPS receiver are then fed in to a modern PC or laptop running appropriate GPS signal processing software for processing the GPS signals to determine a position fix.
  • the authors of this article have contemplated the GPS receiver to be a "plug-in” module, i.e. a "dongle” type device, which because of its simple architecture could be manufactured cheaply, thereby facilitating widespread adoption.
  • the GPS signal processing software which resides on the PC is inherently cheap to replicate.
  • a first position fix In order to track a GPS receiver using such an arrangement, a first position fix would normally (in the absence of AGPS data) require acquisition and tracking of the GPS signals over ⁇ 30s to ensure reception of the GPS time of week (TOW) and up to date ephemeris data.
  • TOW GPS time of week
  • a GPS RF front-end of the type described about would typically output a relative time stamp (i.e. using the timebase of the GPS receiver front-end) followed immediately by a real-time GPS signal sample stream which can be cached in a computer as a snapshot and subsequently processed.
  • a relative time stamp i.e. using the timebase of the GPS receiver front-end
  • a real-time GPS signal sample stream which can be cached in a computer as a snapshot and subsequently processed.
  • An alternative would be to provide timing information in parallel to a
  • the path carrying the GPS signal sample stream is often the only synchronised signal path between the GPS RF front- end and the computer.
  • Other paths may have timing uncertainties, for example, interrupt pins or input / output ports for example so it is difficult to pass timing information with any precision over a parallel signal path.
  • a GPS receiver comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals and a processor for outputting a stream of the GPS signal samples and inserting repeated instances of timing data (optionally including synchronisation code words) indicating the timing of the sampling of the GPS signals in the stream in place of some of the GPS signal samples.
  • Also provided in accordance with the present invention is a method of providing a position fix comprising the steps of: identifying in the stream of GPS signal samples repeated instances of timing data indicating the timing of the sampling of the GPS signals; and processing the GPS signal samples using the timing data to determine a position fix; together with a computer program, computer-readable storage medium and apparatus for the same.
  • the inventor has realised that it is not necessary to send such timing information in a separate physical or virtual channel or header preceding a snapshot payload. Rather, one can insert this data directed in to the GPS signal sample stream, i.e. using a single channel and avoiding the need for an additional channel or multiplexing.
  • timing data can be used to check the integrity of the snapshot. For example, if timing data is not where it is expected in the GPS signal sample stream, it is an indication that the GPS signal sample stream has corrupted.
  • the loss of GPS signal samples has a minimal effect and in fact it is perfectly possible to coherently correlate a block of GPS signal samples containing one or more timestamps to acquire GPS signals.
  • the laptop PC is connected via a USB PC port and corresponding cable to the GPS receiver 10 which consists of a GPS RF front-end Rx and a GPS antenna.
  • the GPS receiver could have been a "dongle" type device thereby omitting the cable, the cable facilitates positioning of the GPS receiver (including the antenna) in a prominent position, thereby increasing the chances of acquiring GPS signals. For example, one might place the GPS receiver near a window if operating in doors.
  • the GPS receiver When operative, the GPS receiver receives NAVSTAR SPS GPS signals through its antenna and pre-process them, typically by passive bandpass filtering in order to minimise out-of-band RF interference, preamplification, down conversion to an intermediate frequency (IF) and analogue to digital conversion.
  • the resultant GPS signal samples contain the IF signal which remains modulated, still containing all the information from the available satellites.
  • the GPS signal samples are outputted from the GPS receiver via the USB link into PC memory (not shown) with periodic timing data inserted in the stream in place of some of the GPS signal samples and indicating the timing of the sampling of the GPS signals (relative to the time base of the GPS RF front-end).
  • GPS signal samples are then processed using timestamps (as described on page 2 above) so that GPS signals may acquired for the purpose of deriving pseudorange information from which the position of the PC can be determined using conventional navigation algorithms.
  • timestamps as described on page 2 above
  • GPS signal acquisition and pseudorange processing is well known, for example, see GPS Principles and Applications (Editor, Kaplan) ISBN 0-89006-793-7 Artech House.
  • An instance of timing data may be identified by searching in the stream of GPS signal samples for an expected instance of timing data based on a previously identified instance of timing data or, alternatively, where synchronisation code word is used, by searching in the stream of GPS signal samples for such a synchronisation code word.
  • a synchronisation code word is used, it is chosen so as to have a very low probability of appearing in a GPS signal sample stream.
  • the present invention has been illustrated in the context of a laptop PC 1 it is of course equally applicable to other apparatus able to support GPS signal processing software and to which a GPS receiver according to the present invention can be connected.
  • the invention may be employed with mobile devices such as PDAs and telephone; or generally stationary objects such as a TVs or TV set-top boxes.
  • NAVSTAR GPS the all weather, spaced based navigation system developed and currently operated by the US Department of Defense, it will be appreciated that the invention is equally applicable to other global positioning systems including GLONASS and Galileo and hybrids thereof.

Abstract

A GPS receiver (10) is disclosed comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals and a processor for outputting a stream of the GPS signal samples and inserting repeated instances of timing data indicating the timing of the sampling of the GPS signals in the stream in place of some of the GPS signal samples. Also disclosed is a corresponding method of providing a position fix and a computer program, computer-readable storage medium and apparatus for the same.

Description

DESCRIPTION
GPS RECEIVER AND RELATED METHOD AND APPARATUS
The present invention relates to a GPS receiver comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals; and a processor for outputting the GPS signal samples.
The present invention further relates to a corresponding method of providing a position fix comprising the steps of receiving from a GPS receiver
GPS signal samples and processing the GPS signal samples to determine a position fix; and to a computer program, computer-readable storage medium and apparatus for the same.
Article "Real-time software radio architectures for GPS receivers" by
Akos et al. (GPS World, July 2001) discloses "software GPS" in which much GPS signal processing is accomplished by means of a programmable micro¬ processor or digital signal processor as opposed to analogue or discrete hardwires components. As illustrated in figure 2 of this article, a simplified GPS receiver is provided consisting of a GPS antenna and GPS RF front-end for GPS signal pre-processing (including filtering, amplification and frequency down-conversion) and analogue to digital conversion. GPS signal samples outputted from the GPS receiver are then fed in to a modern PC or laptop running appropriate GPS signal processing software for processing the GPS signals to determine a position fix. The authors of this article have contemplated the GPS receiver to be a "plug-in" module, i.e. a "dongle" type device, which because of its simple architecture could be manufactured cheaply, thereby facilitating widespread adoption. And, of course, the GPS signal processing software which resides on the PC is inherently cheap to replicate.
In order to track a GPS receiver using such an arrangement, a first position fix would normally (in the absence of AGPS data) require acquisition and tracking of the GPS signals over ~30s to ensure reception of the GPS time of week (TOW) and up to date ephemeris data.
Thereafter, one would not normally continuous track GPS signals as perhaps one would with a conventional hardware based GPS receiver but rather one would periodically resample and timestamp small blocks of GPS signals (commonly termed "snapshots") and reacquire the GPS signals for each block. A position fix on such small snapshots is possible as the time difference between successive snapshots is known (using the timestamps) and hence a measurement of GPS time for a earlier snapshot can then be extrapolated to obtain an estimate of GPS time for a later snapshot for which reacquisition has yet to occur. In addition, ephemeris and estimates of GPS time can be used to simplify the acquisition process as assumptions can be made about observed Doppler and the code phases of the GPS signals in a particular snapshot Therefore, a GPS RF front-end of the type described about would typically output a relative time stamp (i.e. using the timebase of the GPS receiver front-end) followed immediately by a real-time GPS signal sample stream which can be cached in a computer as a snapshot and subsequently processed. An alternative would be to provide timing information in parallel to a
GPS signal sample stream, however, the path carrying the GPS signal sample stream is often the only synchronised signal path between the GPS RF front- end and the computer. Other paths may have timing uncertainties, for example, interrupt pins or input / output ports for example so it is difficult to pass timing information with any precision over a parallel signal path.
In accordance with the present invention, a GPS receiver is provided comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals and a processor for outputting a stream of the GPS signal samples and inserting repeated instances of timing data (optionally including synchronisation code words) indicating the timing of the sampling of the GPS signals in the stream in place of some of the GPS signal samples.
Also provided in accordance with the present invention is a method of providing a position fix comprising the steps of: identifying in the stream of GPS signal samples repeated instances of timing data indicating the timing of the sampling of the GPS signals; and processing the GPS signal samples using the timing data to determine a position fix; together with a computer program, computer-readable storage medium and apparatus for the same.
The inventor has realised that it is not necessary to send such timing information in a separate physical or virtual channel or header preceding a snapshot payload. Rather, one can insert this data directed in to the GPS signal sample stream, i.e. using a single channel and avoiding the need for an additional channel or multiplexing.
A further advantage is that the repeated instances of timing data can be used to check the integrity of the snapshot. For example, if timing data is not where it is expected in the GPS signal sample stream, it is an indication that the GPS signal sample stream has corrupted.
The loss of GPS signal samples has a minimal effect and in fact it is perfectly possible to coherently correlate a block of GPS signal samples containing one or more timestamps to acquire GPS signals.
The present invention will now be described, by way of example only, with reference to the accompanying figure which shows, schematically, a laptop PC connected to a GPS receiver, both operating in accordance with the present invention.
Referring to the accompanying figure, the laptop PC is connected via a USB PC port and corresponding cable to the GPS receiver 10 which consists of a GPS RF front-end Rx and a GPS antenna. Whilst the GPS receiver could have been a "dongle" type device thereby omitting the cable, the cable facilitates positioning of the GPS receiver (including the antenna) in a prominent position, thereby increasing the chances of acquiring GPS signals. For example, one might place the GPS receiver near a window if operating in doors.
When operative, the GPS receiver receives NAVSTAR SPS GPS signals through its antenna and pre-process them, typically by passive bandpass filtering in order to minimise out-of-band RF interference, preamplification, down conversion to an intermediate frequency (IF) and analogue to digital conversion. The resultant GPS signal samples contain the IF signal which remains modulated, still containing all the information from the available satellites. In accordance with the present invention, the GPS signal samples are outputted from the GPS receiver via the USB link into PC memory (not shown) with periodic timing data inserted in the stream in place of some of the GPS signal samples and indicating the timing of the sampling of the GPS signals (relative to the time base of the GPS RF front-end). Using laptop PC based GPS signal processing software the GPS signal samples are then processed using timestamps (as described on page 2 above) so that GPS signals may acquired for the purpose of deriving pseudorange information from which the position of the PC can be determined using conventional navigation algorithms. Such GPS signal acquisition and pseudorange processing is well known, for example, see GPS Principles and Applications (Editor, Kaplan) ISBN 0-89006-793-7 Artech House.
An instance of timing data may be identified by searching in the stream of GPS signal samples for an expected instance of timing data based on a previously identified instance of timing data or, alternatively, where synchronisation code word is used, by searching in the stream of GPS signal samples for such a synchronisation code word. Ideally, if a synchronisation code word is used, it is chosen so as to have a very low probability of appearing in a GPS signal sample stream.
Whilst the present invention has been illustrated in the context of a laptop PC1 it is of course equally applicable to other apparatus able to support GPS signal processing software and to which a GPS receiver according to the present invention can be connected. For example, the invention may be employed with mobile devices such as PDAs and telephone; or generally stationary objects such as a TVs or TV set-top boxes.
Also, whilst the connection between the GPS receiver and the GPS signal processing software is entirely wired in the above example, it could conceivable involve a wireless link.
Finally, whilst the invention has been described in the context of
NAVSTAR GPS, the all weather, spaced based navigation system developed and currently operated by the US Department of Defense, it will be appreciated that the invention is equally applicable to other global positioning systems including GLONASS and Galileo and hybrids thereof.

Claims

1. A GPS receiver comprising a GPS antenna and a GPS RF front-end including an analogue to digital converter for sampling received GPS signals and a processor for outputting a stream of the GPS signal samples and inserting repeated instances of timing data indicating the timing of the sampling of the GPS signals in the stream in place of some of the GPS signal samples.
2. A GPS receiver according to claim 1 wherein the timing data includes a synchronisation code word.
3. A method of providing a position fix comprising the steps of:
■ receiving from a GPS receiver a stream of GPS signal samples ■ identifying in the stream of GPS signal samples repeated instances of timing data indicating the timing of the sampling of the GPS signals; and
■ processing the GPS signal samples using the timing data to determine a position fix.
4. A method according to claim 3 wherein an instance of timing data is identified by searching in the stream of GPS signal samples for an expected instance of timing data based on a previously identified instance of timing data.
5. A method according to claim 3 wherein an instance of timing data is identified by searching in the stream of GPS signal samples for a synchronisation code word.
6. A computer program comprising instructions for performing a method according to any of claims 3 to 5.
7. A computer-readable storage medium having recorded thereon data containing instructions for performing a method according to any of claims 3 to 5.
8. Apparatus configured to perform a method according to any of claims 3 to 5.
9. Apparatus according to claim 8 configured to connect to a GPS receiver of the type claimed in claim 1 or claim 2.
PCT/IB2005/052672 2004-08-18 2005-08-11 Gps receiver and related method and apparatus WO2006018803A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP05774442A EP1782088B1 (en) 2004-08-18 2005-08-11 Gps receiver and related method and apparatus
US11/573,870 US7916079B2 (en) 2004-08-18 2005-08-11 GPS signal samples with timing data
JP2007526677A JP5101281B2 (en) 2004-08-18 2005-08-11 GPS receiver and related methods and apparatus
DE602005005340T DE602005005340T2 (en) 2004-08-18 2005-08-11 GPS RECEIVER AND METHOD AND SUCH DEVICE
CN2005800282223A CN101010598B (en) 2004-08-18 2005-08-11 GPS receiver and related method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0418357.0A GB0418357D0 (en) 2004-08-18 2004-08-18 Gps receiver and related method and apparatus
GB0418357.0 2004-08-18

Publications (1)

Publication Number Publication Date
WO2006018803A1 true WO2006018803A1 (en) 2006-02-23

Family

ID=33042204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/052672 WO2006018803A1 (en) 2004-08-18 2005-08-11 Gps receiver and related method and apparatus

Country Status (9)

Country Link
US (1) US7916079B2 (en)
EP (1) EP1782088B1 (en)
JP (1) JP5101281B2 (en)
KR (1) KR20070048788A (en)
CN (1) CN101010598B (en)
AT (1) ATE389189T1 (en)
DE (1) DE602005005340T2 (en)
GB (1) GB0418357D0 (en)
WO (1) WO2006018803A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009000842A1 (en) 2007-06-26 2008-12-31 Geotate B.V. Processing of satellite positioning system signals
WO2009071686A2 (en) * 2007-12-05 2009-06-11 Qualcomm Incorporated Global navigation receiver
WO2009115320A2 (en) 2008-03-19 2009-09-24 Fraunhofer - Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Device and method for generating a data stream based on data packets provided with packet tracking marks and satellite receiver for providing the data stream
JP2010511884A (en) * 2006-12-04 2010-04-15 ゲオテイト、ベスローテン、フェンノートスシャップ RF signal processing method
EP2339378A1 (en) 2009-12-17 2011-06-29 u-blox AG Hybrid satellite positioning receiver
EP2530488A1 (en) 2011-06-01 2012-12-05 u-blox AG Hybrid satellite positioning with prediction
EP2530487A1 (en) 2011-06-01 2012-12-05 u-blox A.G. Satellite positioning with assisted calculation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2151086B1 (en) * 2007-04-30 2017-06-07 Telefonaktiebolaget LM Ericsson (publ) Method for establishing a random number for security and encryption, and a communications apparatus
US8081922B2 (en) * 2008-05-30 2011-12-20 Qualcomm Incorporated Methods and apparatuses for processing satellite positioning system signals
GB2492547B (en) * 2011-07-04 2018-11-07 Integrated Navigation Systems Ltd Recording, storage and playback of GNSS signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104338A (en) * 1998-05-04 2000-08-15 Snaptrack, Inc. Method and apparatus for operating a satellite positioning system receiver
US6430503B1 (en) * 1998-01-06 2002-08-06 Trimble Navigation Ltd. Distributed GPS navigation system
US6449485B1 (en) * 1999-01-22 2002-09-10 International Business Machines Corporation Technique for mobile wireless device location

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69220705T2 (en) * 1991-04-12 1998-01-22 Sharp Kk Positioning system and GPS receiver
JPH04315077A (en) * 1991-04-12 1992-11-06 Sharp Corp Gps position measurement system, moving station device for the system and base station device
US5379224A (en) * 1991-11-29 1995-01-03 Navsys Corporation GPS tracking system
US5420592A (en) * 1993-04-05 1995-05-30 Radix Technologies, Inc. Separated GPS sensor and processing system for remote GPS sensing and centralized ground station processing for remote mobile position and velocity determinations
GB2278196A (en) * 1993-05-18 1994-11-23 William Michael Frederi Taylor Information system using GPS
US5606732A (en) * 1994-04-26 1997-02-25 Rockwell International Corporation Direct connect radio and antenna assembly
JPH0915320A (en) * 1995-06-30 1997-01-17 Mitsumi Electric Co Ltd Satellite receiver and satellite receiving system
US6018784A (en) * 1997-07-31 2000-01-25 Trimble Navigation Limited PCI card for receiving a GPS signal
JP2000056007A (en) * 1998-08-06 2000-02-25 Matsushita Electric Ind Co Ltd Gps receiver
US6625241B2 (en) * 1999-07-13 2003-09-23 Hewlett-Packard Development Company, L.P. Data communications bit stream combiner/decombiner
JP2002133776A (en) * 2000-10-24 2002-05-10 Toshiba Corp Recording/reproducing device and recording/reproducing method
JP2003338854A (en) * 2002-05-20 2003-11-28 Matsushita Electric Ind Co Ltd Transport stream processing apparatus
GB0230133D0 (en) * 2002-12-24 2003-01-29 Koninkl Philips Electronics Nv GPS receiver device and related method and apparatus
GB0326095D0 (en) * 2003-11-08 2003-12-17 Koninkl Philips Electronics Nv GPS receiver and related method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6430503B1 (en) * 1998-01-06 2002-08-06 Trimble Navigation Ltd. Distributed GPS navigation system
US6104338A (en) * 1998-05-04 2000-08-15 Snaptrack, Inc. Method and apparatus for operating a satellite positioning system receiver
US6449485B1 (en) * 1999-01-22 2002-09-10 International Business Machines Corporation Technique for mobile wireless device location

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AKOS D ET AL: "TUNING IN TO GPS REAL-TIME SOFTWARE RADIO ARCHITECTURES FOR GPS RECEIVERS", GPS WORLD, vol. 12, no. 7, July 2001 (2001-07-01), pages 28 - 33, XP009027266 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010511884A (en) * 2006-12-04 2010-04-15 ゲオテイト、ベスローテン、フェンノートスシャップ RF signal processing method
WO2009000842A1 (en) 2007-06-26 2008-12-31 Geotate B.V. Processing of satellite positioning system signals
US8907843B2 (en) 2007-06-26 2014-12-09 U-Blox Ag Processing of satellite positioning system signals
US8705591B2 (en) 2007-12-05 2014-04-22 Qualcomm Incorporated Global navigation receiver
WO2009071686A2 (en) * 2007-12-05 2009-06-11 Qualcomm Incorporated Global navigation receiver
WO2009071686A3 (en) * 2007-12-05 2009-07-23 Nemerix Sa Global navigation receiver
JP2015111122A (en) * 2007-12-05 2015-06-18 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Global navigation receiver
JP2011506919A (en) * 2007-12-05 2011-03-03 クゥアルコム・インコーポレイテッド Global navigation receiver
KR101164745B1 (en) 2007-12-05 2012-07-12 콸콤 인코포레이티드 Global navigation receiver
WO2009115320A3 (en) * 2008-03-19 2010-03-18 Fraunhofer - Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Device and method for generating a data stream based on data packets provided with packet tracking marks and satellite receiver for providing the data stream
US8451170B2 (en) 2008-03-19 2013-05-28 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Device and method for producing a data stream on the basis of data packets provided with packet sequence marks, and satellite receivers for providing the data stream
WO2009115320A2 (en) 2008-03-19 2009-09-24 Fraunhofer - Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Device and method for generating a data stream based on data packets provided with packet tracking marks and satellite receiver for providing the data stream
EP2339378A1 (en) 2009-12-17 2011-06-29 u-blox AG Hybrid satellite positioning receiver
US9348030B2 (en) 2009-12-17 2016-05-24 U-Blox Ag Hybrid satellite positioning receiver
EP2530487A1 (en) 2011-06-01 2012-12-05 u-blox A.G. Satellite positioning with assisted calculation
US8614641B2 (en) 2011-06-01 2013-12-24 U-Blox A.G. Hybrid satellite positioning with prediction
EP2530488A1 (en) 2011-06-01 2012-12-05 u-blox AG Hybrid satellite positioning with prediction

Also Published As

Publication number Publication date
DE602005005340T2 (en) 2009-07-02
EP1782088A1 (en) 2007-05-09
GB0418357D0 (en) 2004-09-22
CN101010598B (en) 2012-12-26
US20080094279A1 (en) 2008-04-24
EP1782088B1 (en) 2008-03-12
JP5101281B2 (en) 2012-12-19
JP2008510160A (en) 2008-04-03
US7916079B2 (en) 2011-03-29
KR20070048788A (en) 2007-05-09
CN101010598A (en) 2007-08-01
ATE389189T1 (en) 2008-03-15
DE602005005340D1 (en) 2008-04-24

Similar Documents

Publication Publication Date Title
EP1782088B1 (en) Gps receiver and related method and apparatus
EP1685422B1 (en) Gps receiver and related method and apparatus
US8253822B2 (en) Method of position stamping a photo or video clip taken with a digital camera
CA2640651A1 (en) Method and apparatus for acquiring satellite positioning system signals
US7986268B2 (en) GPS RF front end and related method of providing a position fix, storage medium and apparatus for the same
EP1589349A2 (en) Support of the determination of a correlation
US7679556B2 (en) Method of determining a GPS position fix and a GPS receiver for the same
US7765064B2 (en) Computer programmed with GPS signal processing programs
JP5128585B2 (en) Method of using hardware and software for acquisition, tracking and hosting in a CDMA receiver
KR100768987B1 (en) Positioning apparatus and positioning method

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2005774442

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 11573870

Country of ref document: US

Ref document number: 702/CHENP/2007

Country of ref document: IN

Ref document number: 200580028222.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2007526677

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 1020077006079

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2005774442

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 2005774442

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 11573870

Country of ref document: US