Energy Efficient Bidirectional Massive MIMO Relay Beamforming
Michal Yemini, Alessio Zappone, Eduard Axel Jorswieck, Amir Leshem · IEEE Signal Processing Letters · 2017
In this paper, we investigate the global energy efficiency of a bidirectional amplify-and-forward relay MIMO system. It is assumed that the relay serves two end-users, each requiring a minimum target rate. Two algorithms are proposed, a suboptimal one with lower complexity, and an optimal one with slightly higher complexity. We present numerical results that compare the two algorithms and exhibit several optimality properties concerning the global energy efficiency function.