I have seen several references to DSSS-OFDM in relation to some 802.11n radios.
Has this optional frame format been added to 802.11n, or is this an error.
DSSS-OFDM is a modulation option. It is indeed littered throughout the 802.11 standard. But it is an optional implementation (Table 9.4 calls it 'deprecated') and is defined as:"This is a hybrid modulation combining a DSSS preamble and header with an OFDM payloadtransmission."-802.11-2012, Clause 19.1.3
The documents in question, it turns out, were using the heading DSSS-OFDM when they should have used HT.
I was concerned as I don't want our customers to be mislead.