SHORT_PREAMBLE_BIT
CCK_SHORT = SHORT_PREAMBLE_BIT,
PBCC_SHORT = PBCC_RATE_BIT | SHORT_PREAMBLE_BIT,
if (desc->mod_pre & SHORT_PREAMBLE_BIT)
CCK_SHORT = SHORT_PREAMBLE_BIT,
PBCC_SHORT = PBCC_RATE_BIT | SHORT_PREAMBLE_BIT,