Detecção de Sinais Modulados usando Medida de Cicloestacionariedade

Pedro Thiago Valério de Souza, Luiz Felipe de Queiroz Silveira

DOI: 10.14209/sbrt.2013.26

Evento: XXXI Simpósio Brasileiro de Telecomunicações (SBrT2013)

Keywords: Cognitive Radio Spectrum Sensing Cyclostationarity

Abstract

In cognitive radio is desirable that unlicensed users may have opportunities to transmit on unoccupied portions of the spectrum at a given time. A major challenge for the operation of these systems is the development of reliable spectrum sensing techniques, which enable an efficient allocation of the frequencies as they become available. This paper presents a spectrum sensing method that uses a measure calculated from the spectral correlation density function to detect signals in the presence of additive white Gaussian noise. The signal set used in the evaluation of the method includes the AM, QPSK and BPSK modulations. Numerical results demonstrate the performance efficiency of the proposed method, even at low values of signal to noise ratio.

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