MU-MIMO Multi-User MIMO (MU-MIMO) is a set of multiple-input and multiple-output technologies for wireless communication, in which a set of users or wireless terminals is each connected to one or more antennas communicates with each other. Orthogonal Frequency-Division Multiple Access (OFDMA) Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-user version of the popular Orthogonal Frequency Division (OFDM) Digital Modulation Scheme. This allows simultaneous transmission of low data from Several users.