Abstract:
Beamspace multiple-input multiple-output (MIMO) with beam selection offers an attractive
solution to reduce the number of radio-frequency chains in a high-dimensional millimeter-wave MIMO
system. Considering a multi-user MIMO system in which an access point, having an N element antenna array,
communicates with K users (K < N), each having a single antenna, we address the problem of selecting K
beams with sum rate as the performance metric. We model beam selection as a two-sided matching between
the two sets of players (users and beams) and consider two different ways of modeling players preferences.
When the interdependences between the players’ preferences are considered, it becomes matching with
externalities. The proposed algorithm, which finds a stable matching in such a case, outperforms the existing
beam selection algorithms
