Method and apparatus for ofdm transmission in wireless lan

A method and apparatus for OFDM transmission in a wireless LAN is disclosed. A method and apparatus for OFDM transmission in a wireless LAN according to one embodiment includes: a signal repeater repeating an encoded signal by a block to output the encoded signal and repeated signal together; an interleaver interleaving the encoded signal and repeated signal and outputting the interleaved signal; a modulator modulating the interleaved signal and outputting modulated symbols; and a phase rotation unit changing the phase of the modulated symbols. [Reference numerals] (610) Signal repetition unit;(620) Interleaver;(630) Modulation unit;(640) Phase rotation unit;(650) Transmitting unit