Paper Title
Correction of The Propagation Model in Digital Terrestrial Television Networks in Colombian Urban Environments

Abstract
This article presents an ideal propagation model for the design of Digital Terrestrial Television (DTT) networks in Bogotá City. Here was developed, evaluated and compared three propagation models commonly used for the design of this type of networks; these are the methods Stanford University Interim (SUI), Xia-Bertoni and Okumura-Hata. Those were chosen because they allow to calculate the propagation losses over the UHF band and the cartographic information required to estimate the losses by diffraction that does not have high precision. Here, we found two of the selected models that are close to the actual model in a range of 10-15 dB. So, all the models were adjusted and corrected by MATLAB in order to obtain an accurate estimate of signal propagation losses. The models were evaluated with statistical criteria of significance such as correlation coefficient, mean square error, standard deviation and so on [1]. As a result, both Okumura-Hata and Xia-Bertoni models were found to fit easily into the real model, however, the error of the Xia-Bertoni model is smaller than the Okumura model. Keywords - Propagation model, DTT network planning, propagation losses.