More, and More Efficient, MIMO (Multiple Input Multiple Output)
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In 802.11n, the maximum number of MIMO streams is four. Addition of MIMO streams creates a linear increase in overall throughput, and with 802.11ac the maximum number of MIMO streams is increased to eight. So with no other improvements (even though there ARE many more), 802.11ac would double the overall available throughput.
Along with an increase in the number of streams, 802.11ac also introduces higher encoding rates when converting digital traffic for RF modulation. This higher encoding rate results in an overall throughput improvement of over 40%, which is realized for each individual data stream.
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Smarter Channel Bonding
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802.11ac increases the number of channels that can be bonded, creating even wider channels that can handle even greater throughput. Channel widths of 80MHz, and optionally 160MHz, have been added. ...
Multi-User MIMO
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Multi-User MIMO (or MU-MIMO) allows multiple stations to transmit or receive the exact same data simultaneously. For example, if you’re hosting a Super Bowl party and you want to have the game displayed on all your video screens (say two HDTV monitors and an iPad that can be moved around the house), 802.11ac can distribute this video stream simultaneously to all these devices...
Additional Updates
... So, when the accounting is all done, the aggregate capacity of the WLAN grows from 600Mbps with an all-out implementation of 802.11n to 6.93Gbps with an all-out implementation of 802.11ac, better than a 10x improvement!
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via WiFi News by WiFiNovation | Scoop.it More READ
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