How does 802.11ac achieve 6.9Gbps?

Aruba Employee
Question   What are the components of 802.11ac that help in achieving 6.9 Gbps of throughput.

 

With 802.11n, 600Mbps can be achieved with 4 spatial streams.
For 802.11ac, the important contributing factors are:

  1. 256 QAM – Provides 33.37% increase in throughput
  2. 160 MHz – Multiples the existing capacity in 20MHz channel by 9 times
  3. 8 Spatial Streams – Multiplies the throughput by 8 times

Maximum data rate achieved by 802.11n with MCS 7, 1 Spatial Stream and 20 MHz is 72.2Mbps.

So improvement provided by 11ac is:
72.2 * 1.3337 * 9 * 8 = 6933 Mbps (Max with 160 MHz and 8 SS)

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Version history
Revision #:
2 of 2
Last update:
‎06-24-2014 08:29 AM
 
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