Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode

Abstract

A method for automatically detecting a packet mode in a wireless communication system supporting a multiple transmission mode includes: acquiring at least one of data rate information, packet length information and channel bandwidth information from a transmitted frame; and determining the packet mode on the basis of the phase rotation check result of a symbol transmitted after a signal field signal and at least one of the data rate information, the packet length information and the channel bandwidth information acquired from the transmitted frame.

We claim: 
     
         1 . A wireless communication method comprising:
 receiving a Legacy signal (L-SIG) field of a first frame, the L-SIG field comprising a first symbol;   receiving a first control field of the first frame after receiving the first symbol, the first control field comprising a second symbol and a third symbol; and   receiving a second control field of the first frame after receiving the second and third symbols, the second control field comprising a fourth symbol,   wherein:   the first symbol is modulated by Binary Phase Shift Keying (BPSK),   the second symbol comprises control information and a pilot tone, and   the L-SIG field immediately precedes the first control field in the first frame.