Performance of Combinational Cooperative Detection Method under Realistic Conditions

Abstract

Combinational cooperative detection (CCD) is a method where signal energies from multiple secondary users (SUs) are gathered in different combinations in order to reach a unique decision for each secondary user regarding the activity of the primary user. In earlier implementations of the CCD method, the locations of the SUs have been assumed to be fixed and selected near the border points of the communication area, and the detection performance has been studied for different parameters. In this paper, the performance of the CCD method has been studied under realistic conditions. Initially, the effect of random locations of SUs on the detection performance is considered and compared with the performance for fixed locations. Then, the effect of distance variations between the master and the user is investigated. Finally, the effect of different propagation environments on the detection performance is studied. The results presented are important to assess the performance of the CCD method under realistic conditions.