| 主权项 |
1. A wireless communication device, comprising:
a transmitter configured to generate an orthogonal frequency-division multiplexing (OFDM) signal that comprises (i) a preamble and (ii) a data segment, wherein the data segment follows the preamble, and wherein the data segment includes a plurality of data symbols that are each respectively preceded by a corresponding guard interval, wherein (i) a first guard interval preceding a first data symbol in the data segment has a first duration of time, and (ii) each of the corresponding guard intervals that precede the remaining data symbols subsequent to the first data symbol in the data segment have a second duration of time, wherein the second duration of time is shorter than the first duration of time, wherein the preamble is a greenfield preamble, wherein the transmitter is configured to generate the OFDM signal with a signal (SIG) field as a last field of the preamble to indicate (i) that the data segment is arranged with the first guard interval having the first duration and the second guard interval having the second duration of time that is shorter than the first duration of time and (ii) that the OFDM signal is a single stream communication. |
