Network Utility Function Performance Analysis Using Cooperative Spectrum Sensing Network over Fading Channels

In order to utilize the available spectrum efficiently, the CR technology makes use of the spectrum holes in the absence of the licensed user using cooperative spectrum sensing (CSS) network. For an efficient utilization of radio spectrum and to improve the detection probability, network utility function (NUF) should be maximized. In this paper, NUF performance is analyzed using the multiple antennas at each CR with an improved energy detector in CSS network. An error is considered in reporting channel of CSS network. The performance comparison between error free and error present reporting channel also provided using the MATLAB simulations. Finally, network utility function analysis is evaluated using $\boldsymbol{k}=1+\boldsymbol{n}$ and $\boldsymbol{k}=\boldsymbol{N}-\boldsymbol{n}$ fusion rules at FC over Rayleigh and Weibull fading channels. The NUF performance is evaluated for different values of thresholds, error rates in reporting channel, and sensing channel SNR values. Novel missed detection probability expression is derived in Weibull fading channel.