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Simultaneous wireless information and power transfer (SWIPT), which processes information and scavenges energy from the same ambient radio frequency signals, has recently drawn significant attention. In addition, the integration of cognitive radio and two-way relay transmission has emerged as a promising approach for improving spectral efficiency. In this paper, we consider a cognitive two-way relaying...
This paper investigates the energy efficient resource allocation strategy for OFDM-based cognitive radio (CR) networks with imperfect spectrum sensing. The interference model taking the sensing errors into account is formulated at first. And the objective is to maximize the energy efficiency of the multiuser CR system subject to the total transmission power budget and each primary user's (PU) interference...
This letter investigates the energy-efficient power allocation for orthogonal frequency division multiplexing (OFDM) based cognitive radio networks (CRNs). The problem is to maximize the energy-efficiency measured using the "throughput per Joule" metric subject to the total transmit power and interference constraints. It is then transformed into an equivalent convex problem using parametric...
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