Single-cell coverage prediction of LMDS including passive reflectors

This paper presents the scheme of a software planning tool for single microcells, providing local multipoint distribution services (LMDS) at micro and millimeter-waves, particularly in urban or suburban areas. The aim of this planning tool is to provide operators with information, which supports the assessment of the profitability by roughly estimating the maximum number of potential customers, i.e. the total number of households in a certain area, as well as the number of customers (households) which will actually be covered from a site. A household is here considered as a single apartment or flat, thus a building usually consists of several households. This novel household-estimation model is able to estimate the number of households based only on the 3D-data of buildings, without using residential data. Besides the optimization of line-of-sight (LOS) coverage, also the possibility is considered to enhance the coverage into shadowed areas by using optimized reflectors as passive repeaters up to distances of 1 km from the base station, depending on the system margin and the rain climate zone (Jakoby and Hayn 1998, Jakoby et al. 1999). All calculations are based on 3D-databases of both, buildings and vegetation.