Matching Theoretic Beam Selection in Millimeter-Wave Multi-User MIMO Systems

• Published in: IEEE access Vol. 7; pp. 25163 - 25170
• Main Authors: Hegde, Amod, Srinivas, K. V.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Antenna arrays; Antennas; beamforming; Interference; Matching; matching theory; Millimeter wave communication; Millimeter wave technology; Millimeter waves; MIMO (control systems); MIMO communication; Players; precoding; Radio frequency; stable matching; sum-rate; Wireless communication
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2019.2897894

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 <inline-formula> <tex-math notation="LaTeX">N </tex-math></inline-formula> element antenna array, communicates with <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula> users (<inline-formula> <tex-math notation="LaTeX">K < N </tex-math></inline-formula>), each having a single antenna, we address the problem of selecting <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula> 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.