A Smartpower Hybrid Positioning System

Xin Zhang, Jiangping Deng, Xing Zhao, Zhike Jia

Abstract:	Location-based services have gained great momentum fueled by the surging mobile device market, including smartphones, tablets, and many other consumer devices. GNSS-based navigation devices are the dominant solution for these applications. However, because it requires a lot of power consumption for continuous tracking, users usually tend not to turn it on all the time, else it will quickly drain the battery. This paper explores a new smartpower hybrid positioning solution, achieved by integrating GNSS and MEMS via relevant controlling and switching logic. Based on the user’s motion and environment (outdoor/indoor context detection), this smart solution activates appropriate sensors only at the appropriate time, and selects the appropriate duty-cycle mode for the GNSS receiver. The final position is given by fusing sensor-based PDR navigation position and GNSS position information with appropriate weights given to each technology. Field tests using this smart, power-saving solution demonstrate an average of one-third power consumption savings, while maintaining accuracies within 15 meters, compared to standard continuous tracking. Although the positioning error may increase a few meters by utilizing this smartpower strategy, it is still acceptable considering the significant reduction in power consumption. This solution exhibits good potential for a portable, reliable, low-cost, and low-power consumption system that enables continuous navigation anywhere.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	1626 - 1633
Cite this article:	Zhang, Xin, Deng, Jiangping, Zhao, Xing, Jia, Zhike, "A Smartpower Hybrid Positioning System," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 1626-1633.
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