Sensoriamento espectral cooperativo na presença de ruído impulsivo em cenários de TV white spaces

Abstract

The fixed spectral allocation policy adopted by the National Telecommunications Agency in Brazil allows only licensed users to transmit in certain bands. Bands designated for TV transmissions often exhibit spectral inefficiency, as they are not always fully occupied, identified in such cases as TV White Spaces. This provides an opportunity for secondary users to transmit when primary users are not occupying the band, thereby increasing spectrum efficiency. In this study, the performance comparison of the spectral sensing technique for energy detection in cooperative and non-cooperative forms is carried out. The objective is to monitor spectrum occupancy in the TV transmission bands in Brazil, which have primary users transmitting Orthogonal Frequency Division Multiplexing (OFDM) signals in the ISDB-TB TV standard. The study investigates the performance of the sensing system in various contexts, with scenarios that include additive white Gaussian noise (AWGN), multipath fading, and impulsive noise. Evaluation in each simulated case will be carried out through probability of detection and false alarm.