2009/8/14 Nick Kossifidis <mickfl...@gmail.com>: > 2009/8/14 shashi raj singh <singh_shashi...@yahoo.com>: >> Hi All >> >> I have been trying to figure out the init value of AR5K_PHY_SIG_FIRPWR in >> AR5K_PHY_SIG reg. The value that I read is 2127039790. >> > > FIRPWR is a field, are you reading the whole register or just > that field (of course you need to do some typecasting there) ? > >> I looked into legacy hal and it sets firpwr value to -70(hopefully dbm). I >> was going through the ani patent and it says that if signal falls in between >> coarseHi and coarseLo than we shud check for firpwr value. but legacy HAL >> sets coarseHi and low to -14 and -60 respectively. so according to these >> values if signal is between coarsehi and coarselo(-60 and -14) than no need >> to check for firpwr(-70). > > Firpwr i think is related to the power measured at Finit > Impulse Response filters, all SSCI parameters (including firpwr) > are in half db units. > > coarse_high -> high power threshold used for strong signal detection > > coarse_low -> low power threshold > > total_size_desired -> Total size where we settle based on ADCs input > range (coarse hi/lo) > > firpwr -> absolute size of inband signal at ADCs using strong signal > detection. > If the size of the signal is less than firpwr real packets may not be > detected. > (half dbm) Firpwr check is performed after checking if the range is between > coarse_high and coarse_low. > > >> I have two laptops close to eachother trasnmiting at 20dbm. >> >> Is thr any way i can increase rx threshold so that rx will b triggered only >> when one of the laptop transmits? >> >> I thought somehow firpwr will do this or can it be achieved by tweaking >> coarse lo and hi? >> >> Thanks!! >> Shashi > > i think you want to tweak coarse_lo or just force max ssci immunity level. >
btw there is also rssi threshold etc, what exactly do you want to do ? -- GPG ID: 0xD21DB2DB As you read this post global entropy rises. Have Fun ;-) Nick _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
