ABSTRACT
In this chapter, the authors introduced a new sensing technique called the advanced-two-phase detector's spectrum sensing technique. The proposed technique is divided into two phases. The first is an energy detector with a single adaptive threshold and the second has two adaptive thresholds. In the proposed model, if the energy detector with a single adaptive threshold does not detect the primary user signal then the energy detector with two adaptive thresholds tries to detect the primary user signal and gives the appropriate decision. The authors used MATLAB® software for simulation, and graphical results confirm that the proposed advanced two-phase detector technique improves the detection performance and outperforms the energy detector and the cyclo detector-2010, adaptive spectrum sensing-2012, energy detection technique for adaptive spectrum sensing-2015, and energy detector and energy-detector advanced two-phase detector-2015 by 34.4%, 33.9%, 13.4%, and 2.9% at −a 10 dB signal-to-noise ratio, respectively. Further, in terms of sensing time, the presented scheme yields a smaller sensing time frame than the energy detector and the cyclo detector-2010, adaptive spectrum sensing-2012, Adaptive sensing technique using energy detector (EDT-ASS)-2015, and the energy detector and the Energy Detector with Adaptive Threshold (ED-ADT) detector-2015 scheme in the order of 6.8, 2.6, 0.6, and 1.8 ms at −20 dB signal-to-noise, respectively.
