@conference {540,
	title = {Power Minimization in Multi-tier Networks with Flexible Duplexing},
	booktitle = {IEEE Int. Conference on Acoustics, Speech, and Signal Processing (ICASSP)},
	year = {2019},
	month = {May},
	address = {Brighton, UK},
	abstract = {In this paper we present an algorithm to minimize transmit power in multiple-input multiple-output (MIMO) heterogeneous
networks (HetNets) with flexible duplexing, a promising strategy that allows the coexistence of uplink and downlink cells within the same time and frequency resource block. First, the proposed algorithm minimizes transmit power for a given uplink/downlink (UL/DL) combination, and afterwards, the optimal solution out of the explored UL/DL combinations is selected. To reduce
the computational cost of exploring all the UL/DL settings, we propose a hierarchical switching (HS) approach
that considers a reduced subset of transmit directions. By means of Monte Carlo simulations, we show that the proposed
technique provides significant power savings with respect to a conventional time-division duplex (TDD) scheme.},
	author = {Fanjul, Jacobo and Santamar{\'\i}a, Ignacio}
}
