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A Methodology for the Evaluation of a GPS Receiver Performance in Telematics Applications

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3 Author(s)
Aloi, D.N. ; Electr. & Comput. Eng. Dept., Oakland Univ., Rochester, MI ; Alsliety, M.K. ; Akos, D.M.

This paper presents a methodology to evaluate the position availability of automotive grade global positioning system (GPS) receivers intended for Telematics applications utilizing a multichannel GPS satellite signal simulator in a controlled laboratory environment. Initially, field testing of two distinct GPS receivers was conducted in an urban canyon environment and a foliage environment to assess each receiver's position availability performance. Test scenarios were then developed on a multichannel GPS satellite signal simulator in order to create controlled and repeatable stimuli to the GPS receivers. The scenarios take into account the actual satellite constellations at the same day, time, and locations of the field data collections. Furthermore, the number of visible satellites and power levels was adjusted in order to stimulate the hardware tracking sensitivity, hardware acquisition sensitivity, dynamic range, and navigation filter design, all of which impact position availability for GPS receivers. Quantitative results demonstrated good correlation between the results obtained using the developed test scenarios and the results from the field testing. The proposed methodology will result in reducing validation cost and time to market for automotive Telematics products

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:56 ,  Issue: 1 )

Date of Publication:

Feb. 2007

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