Throughput Analysis for Wideband Opportunistic Radio Network

Abstract

Opportunistic radio network (ORN) is one of the promising solution to spectrum insufficiency as it has drawn paramount attention for proper allocation of spectrum in wireless communication system. Cooperation in ORN provides enhanced performance and better quality of services (QoS) than no cooperation case. Firstly opportunistic users (OU) senses spectrum then takes their decisions cooperatively about presence and data transmission state of primary users (PU), so it provides better probability of detection $(P_{d})$ about whether Primary User (PU) is active or inactive and lower probability of false alarm $(P_{f})$. For cooperation among OUs, sensing time increases but better detection, reliable data transmission and maximized throughput is achieved. In this paper comparative studies among different cooperative decision fusion operations and their effect on throughput under different fading channels (Rayleigh and Nakagami) are presented. Finally, an optimal tradeoff between sensing time and time frame for different fusion operations and fading channels are analyzed for wideband ORN.