Multi-level modeling of spectrum use

Spectrum modeling represents an important tool, of the cognitive radio concept. Number of works have focused on developing accurate methods for modeling the spectrum usage in order to provide reliable and efficient assessment of the possible spectrum availabilities. This paper proposes a novel method for modeling of spectrum usage based on classification of measured quantities into multiple levels. The distribution of the measured quantities of each level is fitted using a known mathematical model. The proposed method utilizes practical measurements in different frequency bands focusing on both uplink and downlink channels. The validation results show that the proposed model performs more accurate fitting compared to the existing single-level models for each of the inspected frequency bands.