Patent ID: 8718191

Claim:
A method for transmitting, by a transmitting terminal, data to a receiving terminal in a wireless communication system, the method comprising: generating a first detection field including symbols modulated by using a BPSK data tone; generating a second detection field including symbols, which are modulated such that an even numbered subcarrier and an odd numbered subcarrier have a phase difference of 90 degrees, and modulating the symbols in the second detection field using a pilot tone having a phase difference of 180 degrees; generating a data packet including the first detection field, the second detection field, and the data; and transmitting the data packet through a band, wherein the symbols of the second detection field are modulated such that a data tone of a lower band and a data tone of an upper band have a phase difference of 90 degrees and a pilot tone of the lower band and a pilot tone of the upper band have a phase difference of 90 degrees, when the band is expanded.