TDT DVB-T2 signal coverage in rural zones

Abstract

This paper analyzes the Digital Terrestrial Television (DTT) signal coverage in the department of Cundinamarca, comparing two propagation models: Okumura-Hata, and Stanford University Interim (SUI). These models were selected because they allow the calculation of propagation losses in the UHF band and do not require greater precision in the cartographic information to estimate diffraction losses. As a result, was obtained that the selected models are close to the field measurements, in a range of 8 to 12 dB. In addition, adjustments were made to the propagation models obtaining the losses estimation in the signal propagation. The models were evaluated applying statistical criteria such as: correlation coefficient, mean square error and standard deviation. Finally, it was determined that the two models fit easily to the values obtained in the field measurements; however, the difference presented by the Okumura-Hata model was smaller in comparison with the SUI model; but the latest one allowed a better fit to the propagation model than the Okumura-Hata model.