Patent attributes
A first plurality of OFDM symbols for a first field of a preamble to be included in a data unit that conforms to a first communication protocol are generated, wherein each OFDM symbol of the first plurality of OFDM symbols corresponds to a first long training sequence that is obtained at least by multiplying a predetermined sequence with a second long training sequence defined by a second communication protocol. A first plurality of modified constellation symbols are generated, including multiplying the first plurality of constellation symbols by the predetermined sequence. A second plurality of OFDM symbols are generated to include the first plurality of modified constellation symbols. The preamble is generated to include the first plurality of OFDM symbols for the first field and the second plurality of OFDM symbols for the second field, and the data unit to include at least the preamble.
