In this paper, the performance of energy
detector-based spectrum sensor networks is examined under the
constraints of the IEEE 802.22 draft specification. Additive white
Gaussian noise (AWGN) channels are first considered, and a closed form
solution for sample complexity is derived for networks of any size.
Rayleigh, Nakagami and Rice fading channel models are also examined,
with numerical results demonstrating the effect of these models on the
required sample complexity for varying numbers of cooperating nodes. Based
on these results, the relationship between the sample complexity for
AWGN, Rayleigh and Nakagami channels is examined. Through data fitting,
an approximate model is derived, allowing the sample complexity for
Rayleigh and Nakagami channels to be computed easily. The model is shown
to be accurate across a range of practical values
