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Chapter 3: Multi-User MIMO and Modulation

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Aruba Networks



Multi-user MIMO

Some of the most significant throughput gains of 802.11ac are from multi-user MIMO (MU-MIMO). This exploits the same phenomenon of spatial diversity multiplexing (SDM) used in 802.11n, where multiple antennas send separate streams of data independently, although the transmissions occupy the same time and frequency space. This MU-MIMO technique in 802.11ac is also referred to as spatial diversity multiple access (SDMA).

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