Realistic Assessment of Spectrum Sensing for TV White Space Scenarios in Brazil: Insights for System Optimization

The need for ever-higher transmission bands in the most advanced telecommunications systems is primarily brought on by the growing traffic demand from new services and applications aimed at their consumers. These new systems are currently having trouble accessing the necessary bands because of a situation of spectral scarcity. However, the electromagnetic spectrum's physical constraints are only one cause of this scarcity; another is spectrum underutilization. Cognitive radios, which have spectral sensing capabilities, appear to be a solution to this underutilization issue. This paper assumes scenarios of transmission opportunities inside the TV White Space spectrum in Brazil to simulate and assess spectral sensing based on the energy detection technique. The implemented simulation considers the licensed users' use of an OFDM-like transmission signal in this frequency band, which has clearly defined and standardized features. Through the investigation of detection and false alarm probability, the study evaluates how effectively the spectrum sensing system performs in various circumstances.