SiRF, the leading GPS manufacturer, recently came up with a state-of-the-art technology called “SiRFDirect” which is claimed to allow GPS navigation makers to supply tracking and precision potentials up to now just offered in higher-end systems.
SiRFDiRect technology uses heading and acceleration data from the sensors to boost the accuracy of portable navigation systems when GPS signals are weak or blocked, such as in dense urban canyons and tunnels. Transitions between combined GPS/DR and dead-reckoning-only operation are seamless and accurate without operator intervention, and the closely coupled GPS/DR architecture of SiRFDiRect technology continuously auto-calibrates the heading and acceleration sensors.
The initial adapter of SiRF’s latest SiRFDirect technology is said to be Mio, which is likely to divulge some novel models at Computex Taipei 2007. Mio is said to call this technology by the name of Navsteadi.
