Method and apparatus for generating training signal by using binary sequence in wireless lan system

A transmitting apparatus in a wireless LAN system, the transmitting apparatus comprising:

• an RF unit configured to send and receive radio signals;
• and
• a processor configured to control the RF unit,
• wherein the processor generates a Short Training Field (STF) corresponding to the first frequency band by a transmitting apparatus;
• and
• transmits an STF sequence corresponding to the first frequency band to a receiver by the transmitting apparatus,
• wherein a guard tone and a DC tone of a sequence located at the second frequency band in the STF sequence corresponding to the first frequency band,
• when the second frequency band is located at a first sub-band of the first frequency band, the STF sequence corresponding to the second frequency band is defined based on a preset M sequence as {M, 1, −M, 0, −M, 1, −M}*(1+j)/sqrt(2), where sqrt( ) represents a square root, and
• the preset M sequence represents a binary sequence of a length having 15 bits and is defined as M={−1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1}.