[ath9k-devel] Question on SR71-A and 3x3 MIMO that can only do 300Mbps?

[ath9k-devel] Question on SR71-A and 3x3 MIMO that can only do 300Mbps?

[Ben Greear]

We shipped a few SR71-A systems a long time ago, and we always thought
they were 3x3 MIMO.  Which, datasheet claims is true.  But, it also claims
max speed of 300Mbps and only up to MCS-15.  Our user noticed this limitation
in their testing.

It appears I have been under the mistaken impression that 3x3 MIMO
meant MCS-23 support also existed?


http://dl.ubnt.com/sr71a_datasheet.pdf

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

[ath9k-devel] Question on SR71-A and 3x3 MIMO that can only do 300Mbps?

[Adrian Chadd]

Nope. It's a 2x2 device with 3x3 radios. It's doing transmission,
scrambling and MIMO processing on the incoming data, but it's only
doing 2 spatial streams.

(Yeah, I was bitten by that in my first 802.11 contract. I didn't
really know much about 802.11n then.)


-a


On 14 May 2014 15:50, Ben Greear <greearb@candelatech.com> wrote:
> We shipped a few SR71-A systems a long time ago, and we always thought
> they were 3x3 MIMO.  Which, datasheet claims is true.  But, it also claims
> max speed of 300Mbps and only up to MCS-15.  Our user noticed this limitation
> in their testing.
>
> It appears I have been under the mistaken impression that 3x3 MIMO
> meant MCS-23 support also existed?
>
>
> http://dl.ubnt.com/sr71a_datasheet.pdf
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel