COMPARATIVE STUDY OF COVERAGE OF WLL SYSTEM / ESTUDO COMPARATIVO DE COBERTURA DE SISTEMA WLL
AUTOR(ES)
RENATA TAUIL MARTINS
DATA DE PUBLICAÇÃO
1999
RESUMO
The deployment of wireless local loop systems, known as WLL, must be accomplished after a complete study of the behavior of radio waves propagating through the different environment where these systems will operate. Computer programs based on propagation models, specifically developed for the cellular mobile network, are generally used. The base station coverage is dependent upon the transmitter antenna height, the frequency of operation and the region topographic information. However, the proposed WLL systems will operate on the 1.9 and 3,5 GHz bands, set aside for these services. The question to be asked is if these program will behave accordingly on these new operation frequencies. The answer to this question is of fundamental importance to the developers of these new technology. Moved by this query, this work proposes a comparative experimental investigation of 1.9 and 3,5 GHz propagation in order. To do that a measurement laboratory was assembled and five different regions inside Rio de Janeiro city were chosen for an extensive measurement campaign. So, these thesis presents the results of this measurement campaign and try to answer the question compatibility of the existent models and gives the subsides for the elaboration of a new model if necessary. A number of other important information are also obtained.
ASSUNTO(S)
cobertura radio propagacao wll radio propagation wll environments
