On Wed, Jun 29, 2011 at 6:17 PM, Fred Matthews <fredmm@xxxxxxxxxxxxx> wrote: > > Hi, > Thanks for replying Adrian, > > OK, just for clarity, you are saying for 1-stream STBC NICs > (AR9380/9280), when I enable STBC from hostapd, the driver only > transmits in STBC (transmits multiple copies of data to each antenna) > if it sending at MCSs 0-7 (1 stream rates), due to low signal quality > or via fixing the MCS to those values. For all other MCSs STBC is > disabled. > > Does the rate adaptation (minstrel/ath9k) tell the driver to use STBC, > or is this done at automatically at a lower level? > > Any other information about STBC would be appreciated. > You should really look at the 802.11n standard to understand how they implement STBC. From the driver side, from what I can tell, there is never a downside (rate-wise) to enabling STBC for transmissions at MCS0--MCS7. Thus, minstrel_ht turns it on by default. Dan -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
