Distinguishing and Alleviating Multipaths in Range-based Localization for Wireless Sensor Networks

PhD Thesis Proposal Defence


Title: "Distinguishing and Alleviating Multipaths in Range-based Localization
for Wireless Sensor Networks"

by

Mr. Hoi-Lun Ngan


Abstract:

Localization is one of the essential modules in Wireless Sensor Networks 
(WSNs). Applications like geographical-based routing and event report may 
require position information from individual sensor nodes in order to be 
functional. Range-based localization using RF is one of the popular choices 
because it does not require additional hardware to operate. On the other hand, 
it is well-known that this approach could suffer seriously in indoor 
environment due to multipath effect. In this work, we analyze this effect to 
the physical layer and account for the undesirable RSSI readings being 
reported. We spot out that existing design at physical layer does not flavor 
localization due to the multipath handling methods in wireless communication 
systems. We propose a novel approach which incorporates frequency-varying 
signal to distinguish and alleviate multipaths at the receiver. By removing the 
erroneous non-line-of-sight component, the resulting RSSI is expected to be 
able to improve localization accuracy.


Date:     		Thursday, 22 January 2009

Time:                   3:00p.m.-5:00p.m.

Venue:                  Room 3494
 			lifts 25-26

Committee Members:      Prof. Lionel Ni (Supervisor)
 			Dr. Lei Chen (Chairperson)
 			Dr. Lin Gu
 			Dr. Qian Zhang


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