OFDM communication system and method

摘要

A transmitter ( 200 ) used in a wireless communication system based on an orthogonal frequency division multiplexing (OFDM) scheme includes a determination unit ( 216 ) configured to determine a spreading factor and an amplitude for a control channel based on at least one of signal quality information and interference information in data transmission, a multiplexing unit ( 212 ) configured to multiplex a data channel with the control channel having been code-spread based on the spreading factor and the amplitude, and means ( 214 ) configured to modulate the multiplexed signal in the OFDM scheme and transmit the modulated signal as OFDM symbols.