Power Spectrum Measurements from 30 MHz to 910 MHz in the City of San Luis Potosi, Mexico

Cognitive radio technology emerges as a promising solution to solve the electromagnetic spectrum scarcity. Essentially, the idea behind cognitive radio is to dynamically access underutilized frequency bands in order to improve the spectrum utilization. Currently, several countries around the world are carrying on spectrum occupancy measurement campaigns. However, in Mexico, such measurements have not been carried out yet. In this paper, we present results of power spectrum measurements conducted in the city of San Luis Potosi, Mexico. The preliminary study measures and analyzes the spectrum power in the range of 30 to 910 MHz. Samples of the power spectrum are taken at different times throughout a day and then averaged to obtain the overall behavior. Results clearly show an inefficient use of electromagnetic spectrum in the bands with very low or completely none activity meanwhile there are other bands very crowded with a lot of activity.