# US 2017/0254902 A1 · Multipath error correction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254902 A1 - Document ID: US20170254902A1 - Status: Published application - Kind: A1 - Application number: 15/598,355 - Filed: 2017-05-18 - Published: 2017-09-07 - Earliest claimed: 2015-12-22 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Jumpei Ichinokawa - Web page: https://patentgrep.com/patent/US20170254902A1 ## CPC - G01S 19/22: Multipath-related issues - G01C 21/26: specially adapted for navigation in a road network - G01S 19/45: by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement - G01S 19/485: {whereby the further system is an optical system or imaging system} - G01C 21/3658: {Lane guidance} - G08G 1/167: {Driving aids for lane monitoring, lane changing, e.g. blind spot detection} - 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 - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) - G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93}) ## 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 ### Claim 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; and an error correction component calculating an updated position for the vehicle by performing a comparison between the change of lane information and the second GPS position of the vehicle and setting the updated position for the vehicle as the second GPS position. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) The system for multipath error correction of claim 1, comprising a lane keep assist system (LKAS) component setting a lane continuation flag based on the change of lane information. ### Claim 5 (depends on 4) The system for multipath error correction of claim 4, wherein the error correction component calculates the updated position for the vehicle based on a value of the lane continuation flag. ### Claim 6 (depends on 4) The system for multipath error correction of claim 4, wherein the error correction component checks a validity of data provided by the LKAS component. ### Claim 7 (depends on 6) The system for multipath error correction of claim 6, wherein the error correction component calculates the updated position for the vehicle based on the validity of the data provided by the LKAS component. ### Claim 8 (depends on 7) The system for multipath error correction of claim 7, 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. ### Claim 9 (depends on 1) The system for multipath error correction of claim 1, comprising a lane departure warning (LDW) component determining whether the vehicle has changed lanes based on the change of lane information. ### Claim 10 (depends on 1) The system for multipath error correction of claim 1, wherein the error correction component calculates the updated position for the vehicle based on the comparison. ### Claim 11 (depends on 10) The system for multipath error correction of claim 10, wherein the error correction component calculates the updated position for the vehicle based on a comparison distance threshold. ### Claim 12 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 performing a comparison between the change of lane information and the second GPS position of the vehicle; and setting the updated position for the vehicle as the second GPS position. ### Claim 13 (depends on 12) The method for multipath error correction of claim 12, wherein the first GPS position and the second GPS position are associated with lane level information. ### Claim 14 (depends on 12) The method for multipath error correction of claim 12, wherein the change of lane information is associated with lane level information. ### Claim 15 (depends on 12) The method for multipath error correction of claim 12, comprising setting a lane continuation flag based on the change of lane information. ### Claim 16 (depends on 15) The method for multipath error correction of claim 15, comprising calculating the updated position for the vehicle based on a value of the lane continuation flag. ### Claim 17 (depends on 12) The method for multipath error correction of claim 12, comprising determining whether the vehicle has changed lanes based on the change of lane information. ### Claim 18 (depends on 11) The method for multipath error correction of claim 11, wherein the calculating the updated position for the vehicle is based on a validity of the change of lane information. ### Claim 19 (depends on 11) The method for multipath error correction of claim 11, wherein the calculating the updated position for the vehicle is based on a comparison distance threshold. ### Claim 20 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 and setting the updated position for the vehicle as the second GPS position.