US 12,270,918 B2
Global positioning system bias detection and reduction
Gui Chen, Sterling Heights, MI (US); Shu Chen, Rochester Hills, MI (US); Bo Yu, Troy, MI (US); Joon Hwang, Pflugerville, TX (US); Carl P. Darukhanavala, Royal Oak, MI (US); and Vivek Vijaya Kumar, Shelby Township, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Sep. 21, 2022, as Appl. No. 17/933,895.
Prior Publication US 2024/0094411 A1, Mar. 21, 2024
Int. Cl. G01S 19/39 (2010.01); G01S 19/40 (2010.01)
CPC G01S 19/396 (2019.08) [G01S 19/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A global positioning system (GPS)-bias detection and reduction system, comprising:
a global positioning system (GPS) bias model having GPS statistical data creating a database representing a data set collected from a vehicle group having thousands or multiple thousands of vehicles saved in a database;
a GPS-bias calculated using a look-up of the database;
at least one newly collected vehicle GPS data point compared to the GPS statistical data to reduce negative effects of the GPS-bias and to update the vehicle GPS-bias model;
at least two successive nodes separated by at least one segment of a roadway having a map matching performed using a nearest service from a collection location of the GPS statistical data; and
an estimated horizontal position error (EHPE) value defining a quality indicator applied to distinguish a good quality GPS data from a poor quality GPS data.