An Ultra-wideband Spatial Filter for Time-of-Arrival Localization in Tunnels |
Posted on:2014-07-16 | Degree:M.Appl.Sc | Type:Thesis |
University:University of Toronto (Canada) | Candidate:Jones, Natalie A | Full Text:PDF |
GTID:2458390005986408 | Subject:Engineering |
Abstract/Summary: | |
An ultra-wideband (UWB) spatial filter is proposed to mitigate multipath effects in a one-way, one- dimensional time-of-arrival (TOA) localization system for use inside a tunnel. The spatial filter is a weighted array of judiciously placed antennas and it exploits the fact that electromagnetic waves propagate as modes in a tunnel by selectively extracting these mode(s). The design of several spatial filters is presented alongside vigorous analyses to characterize the localization performance afforded by them in a noisy environment. The filters are evaluated using data from an analytical equation waveguide model, a ray tracer model and measurements. These spatial filters deliver accurate localization estimates across distance and well-designed filters can operate at higher SNRs and further distances than single sensors. Insights into successful spatial filter design are provided and this spatial filtering technique has created a new branch of multipath-aware localization systems. |
Keywords/Search Tags: | Spatial filter, Localization, Engineering |
|
Related items |