SITE-SPECIFIC PREDICTION OF RECEIVED SIGNAL POWER USING MODIFIED TWO-RAY APPROACH
Publication Date : 01/08/2007
This paper presents a model for the prediction of cellular mobile radio received signal power in built-up environments using modified two-ray approach. The classical two-ray model, hitherto reported in the literature, is a basic ray tracing approach, which consists of a direct ray, and a ground-reflected ray, and is most suited for use in open/rural environments that are free of obstructions usually found in highly built urban environments. The modified two-ray model reported in this paper uses direct rays and wall-reflected rays, up to a maximum order of three reflections, for prediction of received signal power in a site-specific built-up environment. The prediction values generated with the model are then validated with measurements using a Cellular Mobile Radio test receiver (Sagem OT 160). A good agreement was found between the prediction and measurement values as the mean difference between these values was only 12.60 dBm which compares well with 6.02 dB between predicted and measured path loss already reported in the literature.
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