This paper studies energy-efficient joint transmit and receive beamforming in multi-cell multi-user multiple-input multiple-output systems. We consider conventional network energy efficiency metric where the users can receive unicasting streams in addition to the group-specific common multicasting streams which have certain rate constraints. The goal is to use the transmission resources more efficiently to improve the energy efficiency, when the users are equipped with multiple antennas. Numerical results show the achieved energy efficiency gains by using the additional degrees of freedom of the multicasting transmission to private message unicasting. Index Terms-Beamforming, minimum mean squared error, energy efficiency, successive convex approximation, fractional programming, circuit power, unicasting, multicasting.
Tervo et al. REF studied energy-efficient joint transmit and receive beamforming in a multi-cell multi-user MIMO system, where the users can receive unicast messages in addition to the group-specific multicast messages at the same time.
Energy-efficient joint unicast and multicast beamforming with multi-antenna user terminals
2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Mathematics Computer Science