airFiber

Rubens Kuhl rubensk at gmail.com
Sat Mar 31 08:02:41 CDT 2012


On Thu, Mar 29, 2012 at 1:34 PM, Eugen Leitl <eugen at leitl.org> wrote:
>
> Claim: 1.4 GBit/s over up to 13 km, 24 GHZ, @3 kUSD/link price point.
>
> http://www.ubnt.com/airfiber

Claims are actually "Up to 1.4 Gbps" and "Up to 13 km"; those two
conditions probably cannot be satisfied together.

1.4 Gbps is actually 700 Mbps per direction. Modulations are 64 QAM,
16 QAM and QPSK (all MIMO) and QPSK (SISO), so we can guess the
throughput of each data rate as:
64QAM MIMO - 720 Mbps (changed from 700 Mbps for numerical convenience)
16QAM MIMO - 480 Mbps
QPSK MIMO - 240 Mbps
QPSK SISO - 120 Mbps


Rubens



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