Fig. 5From: Energy efficiency and sum rate tradeoffs for massive MIMO systems with underlaid device-to-device communicationsCellular ASR vs. D2D ASR [Mbit/s] for a fixed ratio \(\frac {T_{c}}{U_{c}}= 5\). The curves are obtained by varying the value of λ d from 10−6 to 10−2 Back to article page