On Wed, 2008-03-05 at 13:01 +0200, Ron Rindjunsky wrote: > > > >What, for example, is OFDM_HT? What happens when you select a bitrate > > > >of, say, 11MBit and have the 40_MHZ_WIDTH flag set? > > > > > > HT doesn't work on CCK modulations, so this flag just basically says > > > it's HT rate and not legacy rate. > > > > Ok, so what does it mean to set the flag along with a 54MBit rate? > > > > It seems to me that these flags aren't entirely orthogonal to the > > bitrates? > > no, they are all orthogonal to each other. the example you gave will > give us 108MBit. all flags can be used, as long they match the spec, > and that's the algorithm responsibility to check and determine. > I guess that the flag that is more confusing is OFDM_HT. since 11n > supports (theoretically...) n streams of data, using flags like SISO / > MIMO / MIMO_3_ANT / MIMO_... seemed the wrong way. in stead, once you > know OFDM_HT is up, a check to antenna_sel_tx will determine the Tx > expected method. Ahh! Ok, thanks for the explanation. Is antenna_sel_tx really the right thing though? Tomas mentioned that you can have three antennas and only two chains so should that rather be a chain selection? > It may be good to add this to the file's documentation. Indeed. Or to a DOC: section somewhere so it can be added to an 11n chapter of the mac80211 book (since the patch is merged I'm automatically generating it nightly at http://linuxwireless.org/mac80211book/) johannes
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