Multipath error correction

• US 9,766,344 B2
• Filed: 12/22/2015
• Issued: 09/19/2017
• Est. Priority Date: 12/22/2015
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Ichinokawa, Jumpei
• Primary Examiner(s): To, Tuan C.
• Application Number:
  US14/977,689
• Publication Number:
  US 20170176598A1
• Time in Patent Office: 637 Days
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network
• CPC Class Codes: G01C 21/3658 Lane guidance
• CPC Class Codes: G01S 19/22 Multipath-related issues
• CPC Class Codes: G01S 19/45 by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
• CPC Class Codes: G01S 19/485 whereby the further system is an optical system or imaging system
• CPC Class Codes: G08G 1/167 Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Abstract

In one or more embodiments, techniques and systems for multipath error correction are provided herein. A global positioning system (GPS) component or unit determines a position of a vehicle at different times. When the vehicle enters a tunnel, for example, the GPS unit may not provide accurate readings. In this scenario, an image capture component or lane keeping assist system can monitor for a change of lane associated with the vehicle. An error correction component can calculate an updated position for the vehicle by using the change of lane information to confirm or correct the GPS position of the vehicle, such as when the vehicle is exiting the tunnel.

Claims

1. A system for multipath error correction, comprising:

a global positioning system (GPS) component determining a first GPS position of a vehicle at a first time and a second GPS position for the vehicle at a second time;

an image capture component monitoring for a change of lane associated with the vehicle between determination of the first GPS position and the second GPS position for the vehicle;

an error correction component calculating an updated position for the vehicle by using the change of lane information to confirm or correct the second GPS position of the vehicle; and

a lane keep assist system (LKAS) component setting a lane continuation flag based on the change of lane information,

wherein the error correction component calculates the updated position for the vehicle based on a value of the lane continuation flag.

2. The system for multipath error correction of claim 1, wherein the GPS component determines one or more positions of the vehicle at a lane level.

3. The system for multipath error correction of claim 1, wherein the image capture component determines one or more positions of the vehicle at a lane level.

4. The system for multipath error correction of claim 1, wherein the error correction component checks a validity of data provided by the LKAS component.

5. The system for multipath error correction of claim 4, wherein the error correction component calculates the updated position for the vehicle based on the validity of the data provided by the LKAS component.

6. The system for multipath error correction of claim 5, wherein the error correction component determines the updated position for the vehicle is a last known lane based on the lane continuation flag being indicative of the vehicle maintaining lane position between the first time and the second time.

7. The system for multipath error correction of claim 1, wherein the error correction component compares the second GPS position for the vehicle with the change of lane information.

8. The system for multipath error correction of claim 7, wherein the error correction component calculates the updated position for the vehicle based on the comparison.

9. The system for multipath error correction of claim 8, wherein the error correction component calculates the updated position for the vehicle based on a comparison distance threshold.

10. A method for multipath error correction, comprising:

determining a first GPS position of a vehicle;

determining a second GPS position for the vehicle;

monitoring, using image capture sensors, for a change of lane associated with the vehicle between determination of the first GPS position and the second GPS position for the vehicle;

calculating an updated position for the vehicle by using the change of lane information to confirm or correct the second GPS position of the vehicle; and

comparing the second GPS position for the vehicle with the change of lane information.

11. The method for multipath error correction of claim 10, wherein the first GPS position and the second GPS position are associated with lane level information.

12. The method for multipath error correction of claim 10, wherein the change of lane information is associated with lane level information.

13. The method for multipath error correction of claim 10, comprising setting a lane continuation flag based on the change of lane information.

14. The method for multipath error correction of claim 13, comprising calculating the updated position for the vehicle based on a value of the lane continuation flag.

15. The method for multipath error correction of claim 10, wherein the calculating the updated position for the vehicle is based on the comparison.

16. The method for multipath error correction of claim 15, wherein the calculating the updated position for the vehicle is based on a comparison distance threshold.

17. A system for multipath error correction, comprising:

a global positioning system (GPS) component determining a first GPS position of a vehicle and a second GPS position for the vehicle, wherein the second GPS position for the vehicle is associated with an unknown lane;

an image capture component monitoring for a change of lane associated with the vehicle between determination of the first GPS position and the second GPS position for the vehicle; and

an error correction component calculating an updated position for the vehicle by using the change of lane information to update the second GPS position of the vehicle,

wherein the error correction component compares the second GPS position for the vehicle with the change of lane information.