Fig. 8From: Energy efficiency analysis of hybrid-ARQ relay-assisted schemes in LTE-based systemsEnergy efficiency versus transmit power in dBm. The HARQ-CC protocol is used. Direct and cooperative transmissions are considered, and the adopted modulations are: 4, 16, and 64 QAM. PDYN,BB+PST,BB+PST,RF are taken into account in the energy efficiency computationBack to article page