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Re: [PATCH 7/9] mac80211: add flags for STBC (Space-Time Block Coding)

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On Sun, 2010-04-18 at 18:05 +0200, Felix Fietkau wrote:

> >> + * @IEEE80211_TX_CTL_STBC: tells the driver to use Space-Time Block Coding
> >> + *  (STBC) for this frame.
> >>   */
> >>  enum mac80211_tx_control_flags {
> >>  	IEEE80211_TX_CTL_REQ_TX_STATUS		= BIT(0),
> >> @@ -299,6 +301,7 @@ enum mac80211_tx_control_flags {
> >>  	IEEE80211_TX_INTFL_HAS_RADIOTAP		= BIT(20),
> >>  	IEEE80211_TX_INTFL_NL80211_FRAME_TX	= BIT(21),
> >>  	IEEE80211_TX_CTL_LDPC			= BIT(22),
> >> +	IEEE80211_TX_CTL_STBC			= BIT(23),
> > 
> > What if the # of streams is different? That doesn't look sufficient.

> Hm, you're right. I initially thought the combination of the MCS index
> and the STBC flag would be enough, but there are still some corner cases.

Hm actually I guess that should be sufficient? What corner case are you
thinking of?

johannes

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