Análisis y evaluación del espectro radioeléctrico en las bandas VHF y UHF mediante un algoritmo realizado en radio USRP para uso potencial del estándar IEEE 802.11af en la zona urbana del cantón Ambato.

Abstract

For the present investigation the radio spectrum was analyzed and evaluated in the frecuency bands assigned to television in VHF and UHF by means of an algorithm realized in radio defined by software in NI USRP 2920 of National Instruments in the urban area of Ambato canton. This research began with discovering the standard IEEE 802.11af infrastructure. It is established in its components of the physical layer and control of access to the medium. It is understood that this is a part of a set of standards that can work on the TVWS blank spaces that are based on devices that need a GDB Geo-location database and that have as main element a WSM space map. To find the blank television spaces, the evaluation of the radio-electric spectrum was carried out by applying the method of detecting energy with the characteristic of not discriminating any type of signal and focused on detecting the presence of primary users and applied directly on the video port a 1.25MHz from the bottom of the analog television signal. The algorithm was applied through a research field for each of the villages that are part of the urban area in strategic locations with reference to Mount Pilishurco that is the one with the highest concentration of repeating antennas for television transmissions. As a conclusion, the algorithm find blanks with an average of 41.53% of available bandwidth to implement the standard. It is recommended that the results of the white space indicators be used as the basis for the publication of WSM white space maps an international portals and prospective studies at the national level.