GPS POSITION ACCURACY USING FEEDBACK FROM A MAP DATABASE

• US 20080249713A1
• Filed: 08/08/2007
• Published: 10/09/2008
• Est. Priority Date: 04/03/2007
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sessions, Darren Brett
• Application Number:
  US11/835,947
• Publication Number:
  US 20080249713A1
• Time in Patent Office: Days
• US Class Current: 701/211
• CPC Class Codes: G01S 19/40 Correcting position, velocity or attitude
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/011 Identifying the radio environment

Abstract

A mapping software feedback correction system for use with GPS receivers and GPS enabled devices. A Global Positioning System (GPS) receiver in accordance with the present invention comprises a Radio Frequency (RF) section, the RF section adaptable to receive at least one GPS signal from at least one GPS satellite; and a baseband section, coupled to the RF section, wherein the baseband section performs calculations to determine a geoposition of the GPS receiver based on the at least one GPS signal, wherein the geoposition is determined based on a mapping software correction factor.

Claims

1. A Global Positioning System (GPS) receiver, comprising:

a Radio Frequency (RF) section, the RF section adaptable to receive at least one GPS signal from at least one GPS satellite; and

a baseband section, coupled to the RF section, wherein the baseband section performs calculations to determine a geoposition of the GPS receiver based on the at least one GPS signal, wherein the geoposition is determined based on a mapping software correction factor.

2. The GPS receiver of claim 1, wherein the mapping software correction factor is based on a difference between a first geoposition determined by the GPS receiver and a snap-to-road position determined by the mapping software.

3. The GPS receiver of claim 2, wherein the mapping software correction factor is used in a feedback loop.

4. The GPS receiver of claim 3, wherein the mapping software correction factor is used in a navigation algorithm of the GPS receiver.

5. The GPS receiver of claim 4, wherein the GPS receiver calculates a new geoposition based on at least one new signal from at least one GPS satellite and the mapping software correction factor.

6. The GPS receiver of claim 5, wherein the GPS receiver is used in an automotive navigation system.

7. The GPS receiver of claim 6, wherein the mapping software correction factor further comprises a quality factor.

8. A method for determining a position of a receiver using Global Positioning System (GPS) signals, comprising:

determining the position of at least a first GPS receiver using GPS signals;

providing a correction factor to the position from a mapping software algorithm;

seeding a navigation algorithm of the at least first GPS receiver with the correction factor; and

calculating a new position of the at least first GPS receiver using the correction factor.

9. The method of claim 8, wherein the correction factor is used in a feedback loop.

10. The method of claim 9, wherein the GPS receiver calculates a new geoposition based on at least one new signal from at least one GPS satellite and the correction factor.

11. The method of claim 10, wherein the correction factor further comprises a quality factor.

12. A navigation system for determining a position of an object, comprising:

a Global Positioning System (GPS) receiver;

a processor, coupled to the GPS receiver;

a database, coupled to the processor; and

a display, coupled to the processor, wherein the display illustrates the position of the object on a map derived from the database, the position of the object being determined by at least a calculated position determined by the GPS receiver and a correction factor comprising a difference between the calculated position and a determined position based on the map derived from the database.

13. The navigation system of claim 12, wherein the correction factor comprises at least longitude and latitude data.

14. The navigation system of claim 13, wherein the correction factor is used in a feedback loop.

15. The navigation system of claim 14, wherein the correction factor is used in a navigation algorithm of the GPS receiver.

16. The navigation system of claim 15, wherein the GPS receiver calculates a new geoposition based on at least one new signal from at least one GPS satellite and the correction factor.

17. The navigation system of claim 16, wherein the GPS receiver is used in an automotive navigation system.

18. The navigation system of claim 17, wherein the correction factor further comprises a quality factor.