Optimal Energy-Efficient for OFDM-Based Cognitive Relay Networks with Sensing Errors

Optimal power allocation for energy‐efficient full‐duplex cognitive relay networks under primary interference

“…Motivated by the need to improve the EE, several authors have recently made attempts to analyse the EE of CRNs, see e.g. [12–22] and references therein. In [12, 13], the authors have independently investigated the optimal power allocation (OPA) scheme for improving the EE of decode‐and‐forward (DF)‐based dual‐hop CRN.…”

“…In [17], the authors have addressed a residual energy maximisation problem for a two‐hop DF relay‐assisted CRN operating in a time‐slotted mode in the presence of an eavesdropper. In [18], the authors have considered EE maximisation problem in orthogonal frequency division multiplexing (OFDM)‐based CRNs with incomplete spectrum sensing. In [19], the authors have investigated robust power allocation scheme to improve EE for an AF‐based uplink underlay OFDM CRN with imperfect channel state information.…”