An Accurate Model for Periodogram-Based Energy Detection Over Nakagami Fading

Spectrum sensing is a major function within a cognitive radio system, and it is recently shown that the frequency-domain implementation of the energy detector yields a lower probability of false alarm when compared with the time-domain model. In this paper, an accurate mathematical model is presented for spectrum sensing using the periodogram-based energy detector over for independent and identically distributed (i.i.d.) Nakagami fading channels. By exploiting the quadratic form representation of the periodogram, the eigen-value of the product of the sample covariance matrix of the observed vector and the matrix of the quadratic form is investigated for the case of transmission over Nakagami fading.

Provided by: University of Malta Topic: Mobility Date Added: May 2012 Format: PDF

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