Locata Performance in the Presence of WiFi Interference: Test Results

Faisal A. Khan, Chris Rizos, Andrew G. Dempster

Abstract:	Classically difficult positioning environments have always called for some augmentation technology to assist the Global Positioning System (GPS). "Locata" offers augmentation, and even replacement, to GPS in such environments. However, like any other system relying on wireless technology, a Locata positioning network faces issues in the presence of RF interference (RFI). This problem magnifies due the fact that Locata operates in the licence-free 2.4GHz ISM band. WiFi devices operating in this band have been identified as the most likely potential interferer, due partially to their use of the whole ISM band. This paper evaluates the performance of Locata in the presence of WiFi interference. A comparison of Version 2 and Version 3 devices is presented. Evidently very significant advances and improvements have been made in Version 3 for rejecting RF interference (RFI). Test results presented in this paper give an insight into this situation. Also, Locata characteristics have been identified which can be exploited to mitigate RFI issues.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	2645 - 2649
Cite this article:	Khan, Faisal A., Rizos, Chris, Dempster, Andrew G., "Locata Performance in the Presence of WiFi Interference: Test Results," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 2645-2649.
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