Multi-user MIMO
Technologies for wireless communications / From Wikipedia, the free encyclopedia
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Multi-user MIMO (MU-MIMO) is a set of multiple-input and multiple-output (MIMO) technologies for multipath wireless communication, in which multiple users or terminals, each radioing over one or more antennas, communicate with one another. In contrast, single-user MIMO (SU-MIMO) involves a single multi-antenna-equipped user or terminal communicating with precisely one other similarly equipped node. Analogous to how OFDMA adds multiple-access capability to OFDM in the cellular-communications realm, MU-MIMO adds multiple-user capability to MIMO in the wireless realm.
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SDMA,[1][2][3] massive MIMO,[4][5] coordinated multipoint (CoMP),[6] and ad hoc MIMO are all related to MU-MIMO; each of those technologies often leverages spatial degrees of freedom to separate users.