EE Seminar: A Study of Source Localization Using Carrier Phase

~~
Speaker: Ilya Poltorak, 
M.Sc. student under the supervision of Prof. Anthony Weiss

Wednesday, January 20th, 2016 at 15:30
Room 011, Kitot Bldg., Faculty of Engineering

A Study of Source Localization Using Carrier Phase

Abstract

Consider a moving receiver, continuously tracking the carrier phase of a continuous wave signal, produced by a static emitter.
We propose a highly accurate method (order of magnitude of the signal wavelength) for localizing the emitter, using search based as well as closed form methods.
Moreover, we analyze the effect of various challenges to this localization method, such as carrier frequency uncertainty, phase modulation, cycle slips - significant errors introduced by inaccuracies in the phase measurement mechanism and receiver location uncertainties.
We propose a maximum likelihood algorithm that mitigates the carrier frequency uncertainty effect and an "autofocus" method that overcomes the receiver location uncertainties, utilizing emitters of opportunity.
According to our analysis, the cycle slips pose the most significant challenge to the proposed method, as other effects can be mitigated or result in a significantly smaller degradation on the localization accuracy.
The performance of the algorithms is validated analytically and numerically by the Cramer Rao Lower Bound, by small error variance derivations and by Monte-Carlo simulations.