Fig. 13From: Energy efficiency analysis of hybrid-ARQ relay-assisted schemes in LTE-based systemsEnergy efficiency for AF and DF versus transmit power in dBm (\(N_{\max } = 2\)). The HARQ-CC protocol is used, and the adopted modulation order is 4QAM. PDYN,BB+PST,BB+PST,RF are taken into account in the energy efficiency computationBack to article page