PREAMBLE STRUCTURE FOR SYNCHRONIZATION DEVICE OF WIRELESS LAN SYSTEM USING MULTIPLE INPUT/OUTPUT OFDM METHOD APPLICABLE TO VARIOUS KINDS OF MULTIPLE INPUT/OUTPUT OFDM METHODS AND DIVERSITY METHODS

摘要

PURPOSE: A preamble structure for a synchronization device of a wireless LAN system using a multiple-input multiple-output OFDM method is provided to improve performance by providing an excellent effect to a signal detection process, a symbol offset estimation and correction process, a frequency offset estimation/correction process, and a channel estimation process. CONSTITUTION: A preamble structure includes a short training symbol transmission process, a long training symbol transmission process, and an orthogonal pattern transmission process. The short training symbol transmission process is performed to transmit simultaneously short training symbols to all of transmission antennas. The long training symbol transmission process is performed to transmit simultaneously long training symbols to all of the transmission antennas. An orthogonal pattern transmission process is performed to transmit orthogonal patterns.