We’ve demoed a lot of new and improved solutions at Telematics Munich 2014 – the connected car just gets more intricate and exciting with each event. For me however, the most exciting of CSR’s announcements has been the latest software releases for our SiRFstarV™ 5ea auto-grade quad-GNSS location platform. We are now offering concurrent use of GPS and BeiDou (BDS) satellite constellations as well as major updates to the our SiRFDRive® software dead reckoning (DR) algorithms (you can read the press release for more details here).
Many Tier 1 suppliers and OEMs are frustrated with the overall positioning performance and associated route guidance in challenging environments such as Chicago and Tokyo. In particular, they struggle with corner cases where inaccurate positioning leads the navigation application to believe the vehicle is on the wrong street or at the wrong place on the right street.
This can result in incorrect guidance which will persist until the system recovers and gets an accurate position. In the case of telematics systems supporting emergency responses and stolen vehicle tracking services, providing accurate positioning at all times and in all environments is critical for effective service delivery.
Another benefit is that because GNSS and DR integrate with the navigation applications and thereby simplifying map matching, the overall solution is far more accurate. It reduces the efforts for such integration activities (and associated costs), and it also shortens the time to market of the navigation and telematics systems.
The two key ingredients in making the improvements are:
1) Concurrent multi-constellation support using GPS + GLONASS provides access to more satellites, increasing availability and the accuracy of the GNSS solution and;
2) The improved DR algorithms include elements such as better calibration of the MEMS sensors and vehicle inputs, as well as more intelligent use of the MEMS sensor and GNSS satellites in the GNSS + DR Kalman Filters
CSR is keeping a keen eye on the development of MEMS sensors since we are seeing an explosive increase in demand primarily from smartphone and tablet applications. MEMS sensor performance improvements along with decreasing cost for the sensors themselves will provide opportunities for continued SiRFDRive performance improvements.
At Telematics Munich we presented the capabilities of SiRFDRive on SiRFstarV 5ea using a video of Chicago illustrating the challenges for a GNSS system alone in providing accurate positioning in an urban canyon environment. The video, which you can view below, contrasts this to the benefits of adding the MEMS sensor inputs to the GNSS measurements in SiRFDRive.
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