METHOD FOR TRANSMITTING DATA IN A WIRELESS LAN SYSTEM USING AN OFDM METHOD, PARTICULARLY CONCERNED WITH MAINTAINING THE QUALITY OF A WIRELESS LAN SERVICE IN A CASE WHEN A USER TERMINAL MOVES AT HIGH SPEED

摘要

PURPOSE: A method for transmitting data in a wireless LAN system using an OFDM method is provided to group data symbols according to a high-speed mobile environment, and to insert pilot symbols used for a channel characteristic estimation between each data symbol group, thereby transmitting/demodulating data without an error and a fading influence even though a mobile moves at high speed. CONSTITUTION: OFDM frames modulated by an OFDM method consist of data fields including plural training symbols and plural data symbols. The data fields include plural data symbol groups and plural pilot symbols for estimating and compensating for channel changes by being disposed between the plural data symbol groups, respectively. The plural data symbol groups are composed of plural sets of guard intervals and data symbol pairs, and transmit data to a wireless terminal through an access point.