Robust likelihood function for blind mobile terminal localization

Abstract

The focus of this contribution is put on the blind localization of mobile terminals in urban scenarios. The proposed localization method exploits multipath propagation, which is typical of urban terrain. It is assumed that each multipath component is characterized by its direction of arrival (DoA) and relative time of arrival (RToA) parameter. In essence the developed method compares the multipath parameters predicted by the ray tracing algorithm with those measured by the single observing station. In this context inevitably occur a multipath order problem, which is tackled in detail within a proposed likelihood function definition. The latter follows an approach known from the robust statistics. Its intention is to provide a robust and reliable position estimate having at hand minimum a priori information about system parameters.