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Sociedade Brasileira de Telecomunicações

Adjustments of Log-Distance Path Loss Model for Digital Television in Lima


it is necessary to perform a proper planning for an efficient deployment of new infrastructure for transmission of digital television in countries that have adopted such technology. In that sense, the coverage prediction process, which makes use of path loss propagation models, plays an important role. The log-distance path loss model determines that the average power loss depends logarithmically on the distance and it has a parameter called propagation exponent which is required to be calculated for each studied environment. This paper describes the adjustments made to the log-distance path loss model using data from three sets of signal strength measurements in Lima, Peru. Through a series of iterations, two computationally simple models for estimating the average path loss were obtained. The performance of the models were evaluated comparing their results with those calculated using Okumura-Hata and the Rec. ITU-R P.1546 model, showing good results. The proposed strategy used here can be applied to any other environment of propagation to estimate the path loss.

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