A multipath propagation model and a prediction equation for r.m.s. delay spread are discussed for LOS street microcells with building roof base sites in urban areas. The proposed model is established to explain a mechanism of multipath propagation. The delay profiles calculated using the model agreed well with the measured profiles. The factors influencing the r.m.s. delay spread are investigated based on the model, then it is found that the factors are LOS and road width, etc. The prediction equation for medium r.m.s. delay spread based on those factors is proposed.
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Ichitsubo et al. (2002) studied this question.
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