ESTUDO E SIMULAÇÃO DE TÉCNICAS DE LOCALIZAÇÃO DE TERMINAIS EM AMBIENTES MICROCELULARES / INVESTIGATION AND SIMULATION OF TERMINAL LOCATION TECHNIQUESIN MICROCELLULAR SYSTEMS

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The location of mobile terminals in mobile cellular systems has been receiving increasing attention in the last few years. This interest in focused not only in security aspects but also in the development of new services for commercial application. In this Dissertation a simulation environment for mobile stations location in microcellular systems was developed. The simulation tools include a ray tracing software, previously implemented using the ray launching technique, to estimate the path lengths and time of arrival of signals from the mobile station to several radio base stations, and new software implementing terminal location methods using the Taylor linearization and the Chan methods. The simulation tools were tested in scenarios of simple geometry producing consistent results and showing that ray tracing can be a useful tool for simulation and development of location algorithms. The simulations allowed the investigation of location precision dependence on the number of radio bases employed and the evaluation of the estimation methods in visibility (LOS) and non- visibility (NLOS) conditions. The influence of base station antennas heights was also investigated.

ASSUNTO(S)

telecomunicacoes tracado de raios sistemas moveis celulares telecomunications ray tracing mobile terminal location localizacao de terminais moveis diferenca de tempos de chegada (tdoa) mobile cellular systems time difference of arrival (tdoa)

ACESSO AO ARTIGO

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