Patent ID: 8873680

Claim:
A wireless communication device, comprising: a receiver configured to receive an orthogonal frequency-division multiplexing (OFDM) signal, wherein the OFDM signal includes a greenfield preamble; an interval select logic configured to determine a type of guard intervals in the OFDM signal based, at least in part, on the greenfield preamble, wherein the interval select logic determines the type of the guard intervals upon determining that the OFDM signal is a single stream communication; and a signal processor configured to process the OFDM signal based, at least in part, on the type of the guard intervals as determined by the interval select logic, wherein the signal processor is configured to process a first guard interval in the OFDM signal as a long guard interval and subsequent guard intervals in the OFDM signal as short guard intervals only when the OFDM signal is a single stream communication and the type of the guard intervals indicates short guard intervals.