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In-car GPS features dead-reckoning tech

Posted: 24 Apr 2007 ?? ?Print Version ?Bookmark and Share

Keywords:GPS module? dead reckoning? car navigation systems?

u-blox AG has introduced its LEA-4R GPS module with built-in dead reckoning technology that will ensure 100 percent road coverage for car navigation systems. Continuous coverage allows for GPS-enabled applications such as car navigation, emergency vehicle services, asset and vehicle tracking products and road pricing systems, which require accurate, uninterrupted navigation.

The dead reckoning technology uses sensors that detect travelled distance and turn rate, supplementing GPS data and thus providing an accurate position in tunnels, indoor parking facilities, roofed logistics centers, urban canyons and any other environment where obstructed GPS signals hinder positioning, said the company.

The built-in Enhanced Kalman Filter algorithm uses a combination of GPS and dead-reckoning data that counters the respective disadvantages of each approach, said the company. Depending on the quality of the GPS signal and on how well the dead-reckoning sensors are calibrated, the technology uses a weighted mix of both data, which is said to generate optimal accuracy and coverage results. The LEA-4R algorithmic approach also eliminates multipath effects caused by high-rise buildings, position inaccuracies and distortions from jamming sources.

Samples will be available in May 2007 at the u-blox online shop.

- Gina Roos

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