A preamble configuring method in the Wireless LAN System, and a method for a frame synchronization detection

The present invention relates to a preamble configuration method and the frame synchronization detecting method for detecting a frame synchronization of data transmitted in frame units from 60㎓ wireless LAN system. In the frame synchronization detecting method detects the frame synchronization in accordance with the auto-correlation properties of the short preamble comprises a plurality of repeating one symbol IS and S symbols to be included in the frame. After the frame synchronization, and it estimates the timing to perform an autocorrelation of the window set to a predetermined range. According to the invention, 60㎓ by detecting a starting point of a frame when the transmission and reception of the packet or frame-by-frame made in a wireless LAN system, haejugo enables reliable demodulation of the signal at the receiver, and increase the capacity of the whole wireless LAN system 60㎓ can. A wireless LAN system, a frame, synchronization, auto-correlation