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Journal Articles from ESL Students, Faculty and Researc

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A 9,000 foot gap in the middle of the Morganza to the Gulf storm protection system near Cocodrie should be completed this summer.

This paper presents a WiFi-aided magnetic matching (MM) algorithm for indoor pedestrian navigation with consumer portable devices. This algorithm reduces both the mismatching rate (i.e., the rate of matching to an incorrect point that is more than 20 m away from the true value) and computational load of MM by using WiFi positioning solutions to limit the MM search space. Walking tests with Samsung Galaxy S3 and S4 smartphones in two different indoor environments (i.e., Environment #1 with abundant WiFi APs and significant magnetic features, and Environment #2 with less WiFi and magnetic information) were conducted to evaluate the proposed algorithm. It was found that WiFi fingerprinting accuracy is related to the signal distributions. MM provided results with small fluctuations but had a significant mismatch rate; when aided by WiFi, MM’s robustness was significantly improved. The outcome of this research indicates that WiFi and MM have complementary characteristics as the former is a point-by-point matching approach and the latter is based on profile-matching. Furthermore, performance improvement through integrating WiFi and MM depends on the environment (e.g., the signal distributions of magnetic intensity and WiFi RSS): In Environment #1 tests, WiFi-aided MM and WiFi provided similar results; in Environment #2 tests, the former was approximately 41.6% better. Our results supported that the WiFi-aided MM algorithm provided more reliable solutions than both WiFi and MM in the areas that have poor WiFi signal distribution or indistinctive magnetic-gradient features.

These documents give a detailed overview of a specific topic. Currently this includes: NAVGUIDE; VTS Manual; and CLU Manual. The NAVGUIDE covers all aspects of Aids to Navigation (AtoN) and is updated every four years at each IALA Conference. The VTS Manual covers all aspects of Vessel Traffic Services and is updated every four years at each Symposium.

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Journal Articles from ESL Students, Faculty and Researc

Lecture Notes in Electrical Engineering Volume 107For further volumes: http://www.springer.com/series/7818 James J...