[ath9k-devel] CSI support

[Nikolay Makarov <opnmakarov@gmail.com>]

Thank you very much Adrian. I would appreciate your help.

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On 10.03.2013, at 10:21, Adrian Chadd <adrian@freebsd.org> wrote:

> On 8 March 2013 23:16, Nikolay Makarov <nmakarov@live.ru> wrote:
>> Sorry. My bad.
>>
>> The CSI (channel state information) is similar to RSSI which describes the
>> power of received signal. But unlike RSSI, CSI is energy over multiple
>> subcarriers. In 802.11 g/n, there are 64 subcarriers. So CSI is a vector
>> with 64 elements, each is a complex value. At the physical layer of wifi,
>> they will do channel estimation, CSI is the channel estimation results for
>> every subcarrier.
>
> Oh, right. Yes. I think there's a way to get the CSI out of the hardware.
> I don't know any ETA for that though; sorry.
>
> I'll poke some people to see if I can get some documentation about how
> to get CSI values and how to interpret them.
>
> Thanks,
>
>
>
> Adrian