Multi-Protocol Frame Format

Communication apparatus, comprising:

• a transceiver configured to transmit and receive signals over a wireless channel in accordance with both a first communication protocol and a second communication protocol, the first communication protocol defining a nominal communication bandwidth, the second communication protocol being backward-compatible with the first communication protocol while defining an enhanced communication bandwidth, which is at least twice the nominal communication bandwidth;
• and
• a communication controller, which is configured to generate data frames for transmission by the transceiver, including frame headers in a header format that is compatible with both the first communication protocol and the second communication protocol, such that the frame headers are transmitted within the nominal communication bandwidth, and the data frames that are transmitted in accordance with the second communication protocol have first and second frame headers that are transmitted in parallel in respective first and second sub-bands of the enhanced communication bandwidth.