Modified Hard Fusion Rule for Improving Throughput in Cognitive Radio Network

Hikmat N. Abdullah, Nuha Sh. Bakr

Abstract: Abstarct: One of the main challenges in cognitive radio (CR) is throughput maximization. In cooperative CR, suitable decision rule can enhance the throughput. In this paper, an efficient hard decision rule is proposed to improve the detection of the primary user, and improve CR throughput. The performance of the proposed rule is evaluated in both AWGN and Rayleigh fading channels and compared with OR, AND, and Majority rules. The simulation results showed that the proposed method enhances the throughput over other rules. The results also demonstrated the proposed rule enhances the probability of false alarm (PFA) by 38.7% and 45% over the MAJORITY rule when SNR equals -1 dB in AWGN and Rayleigh fading channel respectively.

Keywords: Cognitive radio, spectrum sensing, energy detection, throughput maximization, cooperative sensing, fusion center.