Communications of the ACM
A System That Improves the Precision of Gps in Cities By 90 Percent
A new system developed by Carlos III University of Madrid, which promises to improve GPS vehicle location capabilities by up to 90 percent, incorporates three accelerometers, three gyroscopes and specialized software.
Credit: Carlos III University of Madrid
Carlos III University of Madrid (UC3M) researchers say they have developed a system that improves global positioning system (GPS) capabilities by up to 90 percent. The system, which is based on sensorial fusion, incorporates a conventional GPS signal with those of other sensors to reduce the margin of error in establishing a location. "We have managed to improve the determination of a vehicle’s position in critical cases by between 50 and 90 percent, depending on the degree of the signals’ degradation and the time that is affecting the degradation of the GPS receiver," says UC3M's David Martin. He says the prototype can guarantee the position of a vehicle to within two meters in urban settings. The system, which incorporates three accelerometers and three gyroscopes to measure changes in velocity and maneuvers performed by the vehicle, uses specialized software to analyze the data and find the geographic coordinates. "This software is based on an architecture that uses context information and a powerful algorithm that eliminates the instantaneous deviations caused by the degradation of the signals received by the GPS receiver or the total or partial loss of the satellites," says UC3M's Enrique Marti.
From Carlos III University of Madrid
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