On Thu, May 26, 2011 at 1:03 PM, Falk-Moritz Schaefer <falk.schae...@tu-dortmund.de> wrote: > Try the following command "iw wlanX set txpower fixed Y", where Y=300 for a > low transmission power and Y=2000 for a high transmission power. > Please be aware, that different calibration values are read from eeprom for > different mcs, e.g. the highest transmit power for 54 Mbit/s is already > reached when using Y=1400. Anything higher will not have any effect on the > used power for 54 Mbit/s. This makes sense, because the higher the > transmission power the lower the SINR on the subcarriers depending on the RF > properties. High MCS require high SINR, so that the transmission power must > be reduced. Another influence might have the PAPR reduction algorithm > introduced in AR93xx, but I don't know if it is actually used in the current > driver.
PAPRD is currently disabled > > Maybe someone can provide more detailed information about transmission power > control for AR93xx? I am very interested, too. > > Regards, > Falk > > > >> -----Original Message----- >> From: ath9k-devel-boun...@venema.h4ckr.net [mailto:ath9k-devel- >> boun...@venema.h4ckr.net] On Behalf Of Daniel Halperin >> Sent: Thursday, May 26, 2011 3:28 AM >> To: ath9k-devel@lists.ath9k.org >> Subject: [ath9k-devel] txpower control issues >> >> Hi, >> >> I have an ar9380-based chip and am playing with power control. iw reports > a >> maximum tx power of 27 dBm. >> >> When I run iwconfig wlan1 txpower [0-4] iwconfig reports a radiated power >> value between 0 and 4 dBm, but the rate is very high. >> When I run iwconfig wlan1 txpower 5, the rate drops 100 Mbps. >> >> Am I using iwconfig incorrectly? Is power control for ath9k buggy? Is > there >> another CLI to control power that I should be using? >> >> I am using latest wireless-testing and AP is on channel 124. >> >> Thanks, >> Dan >> _______________________________________________ >> ath9k-devel mailing list >> ath9k-devel@lists.ath9k.org >> https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
