Method and apparatus for generating a phy header field

An apparatus comprising:

• a network interface having a physical layer (PHY) processing unit, the PHY processing unit configured to
• generate bits to be included in a field of a PHY header,
• duplicate the bits to generate duplicated bits,
• generate first modulation data based on the duplicated bits, the first modulation data corresponding to a first set of orthogonal frequency domain multiplexing (OFDM) sub-carriers corresponding to a first frequency band, and
• generate second modulation data using the first modulation data, the second modulation data corresponding to a second set of OFDM sub-carriers corresponding to a second frequency band;
• wherein the network interface is configured to generate one or more signals i) that span the first frequency band and the second frequency band and ii) that correspond to field of the PHY header, wherein generating the one or more signals includes performing a frequency domain to time domain conversion based on the first modulation data and the second modulation data.

A method of generating a field of a physical layer (PHY) header of a data unit, the method comprising:

• generating bits to be included in the field;
• duplicating the bits to generate duplicated bits;
• parsing the duplicated bits into a plurality of segments;
• for each segment, interleaving duplicated bits within the segment without interleaving duplicated bits from other segments;
• after interleaving duplicated bits,
• generating modulation data based on the duplicated bits, the modulation data corresponding to a plurality of orthogonal frequency domain multiplexing (OFDM) sub-carriers, and
• generating one or more signals that correspond to the field of the PHY header, including performing a frequency domain to time domain conversion based on the modulation data.

An apparatus comprising:

• a network interface having a physical layer (PHY) processing unit, the PHY processing unit configured to
• generate bits to be included in a field of a PHY header,
• duplicate the bits to generate duplicated bits,
• parse the duplicated bits into a plurality of segments,
• for each segment, interleave duplicated bits within the segment without interleaving duplicated bits from other segments, and
• after interleaving duplicated bits, generate modulation data based on the duplicated bits, the modulation data corresponding to a plurality of orthogonal frequency domain multiplexing (OFDM) sub-carriers;
• wherein the network interface is configured to generate one or more signals that correspond to the field of the PHY header, wherein generating the one or more signals includes performing a frequency domain to time domain conversion based on the modulation data.