A DSP-based Multi-sensor Multi-network Positioning Platform

R. Chen, Y. Chen, L. Pei, W. Chen, J. Liu, H. Kuusniemi, H. Leppäkoski, J. Takala

Abstract:	Navigation applications and location-based services are now becoming standard features in smart phones. However, locating a mobile user anytime anywhere is still a challenging task, especially in GNSS degraded and denied environments such as urban canyons and indoor environments. To approach a seamless indoor/outdoor positioning solution, self-contained sensors, such as accelerometers, digital compasses, gyros, and pressure sensors are being adapted as augmentation technologies to a GNSS receiver. However, the GNSS obstructed areas are typically contaminated such that significant error sources disturb the measurements of the augmenting sensors as well, e.g. a digital compass can be disturbed significantly by any object bearing magnetic perturbance, for example, an elevator; not to mention the problems of signal-degraded areas e.g. indoors. This paper presents a DSP-based positioning platform based on multiple sensors and multiple networks. The positioning sensors include a GNSS receiver and low-cost self-contained sensors (accelerometer and digital compass), while the networks include WLAN/Bluetooth. Algorithms applying GNSS, sensor measurements, and network measurements for data validation, outlier rejection, and positioning are discussed in this paper. Test results in both indoor and outdoor environments are presented and the positioning performance is demonstrated.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	615 - 621
Cite this article:	Chen, R., Chen, Y., Pei, L., Chen, W., Liu, J., Kuusniemi, H., Leppäkoski, H., Takala, J., "A DSP-based Multi-sensor Multi-network Positioning Platform," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 615-621.
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