Performance of secondary user with combined RF and non-RF based energy-harvesting in cognitive radio network

Abstract

In this paper the performance of a cognitive radio (CR)network is investigated under harvesting of energy from combined RF signal and ambient sources, i.e., non-RF signal. The CR harvests energy from ambient sources as well as from primary user (PU) signal depending on the sensing decision. The quality of service (QoS) of PU is protected in terms of collision probability. The performance has been investigated in terms of harvested energy, throughput and harvested energy left for next detection cycle with respect to different sensing parameters such as sensing channel SNR, collision probability and sensing time etc. A Novel analytical expressions of harvested energy and throughput are developed under such scenario.