[iwlwifi] Change MIMO Bit Rates

[iwlwifi] Change MIMO Bit Rates

[An (Jack) Chan]

Dear all,

>From linux-wireless documentation for iw, I find that setting
preferences for transmitting using MCS rates is not yet supported.
Does it mean I cannot set different MIMO rate through iw CLI?

What is the default MIMO bit rate the iwl5000 would use? I setting up
an ad-hoc connection between two laptops equipped with Intel 5300
cards with 3 antennas each. I find the bit rate is only 5.5Mbps when I
use "iw dev ah0 station dump" to check. It seems not a MIMO bit rate.

Maybe I miss something. Does anyone have any idea?

Thank you very much.

Best,

Jack


On Tue, Nov 16, 2010 at 10:45 PM, An (Jack) Chan <jackachan@gmail.com> wrote:
> Thank you very much, Johannes.
>
> I have one more question. Do you know if iwl5000 supports both
> Space-Time Block Coding (STBC) and Spatial Multiplexing (SM)? That
> means I can change the rates in both STBC and SM schemes?
>
> As I know in Ralink's RT2880, their configuration file provides an
> interface for setting different MCS values. STBC is from 0 to 7, while
> SM is from 8 to 15, and 33 is auto-rate.
>
> Jack
>
>
> On Tue, Nov 16, 2010 at 10:36 PM, Johannes Berg
> <johannes@sipsolutions.net> wrote:
>> On Tue, 2010-11-16 at 21:12 +0100, An (Jack) Chan wrote:
>>
>>> Does anyone know where I can find the implementation of rate
>>> adaptation in iwl5000 driver?
>>
>> It's in iwl-agn-rs.c
>>
>> johannes
>>
>>
>



-- 

Jack
http://csiflabs.cs.ucdavis.edu/~jackchan/

Re: [iwlwifi] Change MIMO Bit Rates

[Guy, Wey-Yi]

On Thu, 2010-11-18 at 07:05 -0800, An (Jack) Chan wrote:
> Dear all,
> 
> From linux-wireless documentation for iw, I find that setting
> preferences for transmitting using MCS rates is not yet supported.
> Does it mean I cannot set different MIMO rate through iw CLI?
> 
> What is the default MIMO bit rate the iwl5000 would use? I setting up
> an ad-hoc connection between two laptops equipped with Intel 5300
> cards with 3 antennas each. I find the bit rate is only 5.5Mbps when I
> use "iw dev ah0 station dump" to check. It seems not a MIMO bit rate.
> 
> Maybe I miss something. Does anyone have any idea?
> 
> Thank you very much.
> 
> Best,
> 

iwlwifi driver does not support 11n in IBSS mode

Wey