Methods and apparatuses for orthogonal frequency division multiplexing communication

摘要

A method and apparatus for transmitting and receiving a digital signal using an orthogonal frequency division multiplexing (OFDM) communication system are provided. In this method, subcarriers are split into a plurality of subcarrier groups according to available frequency bandwidths and are respectively transmitted from a transmitter and the subcarrier groups are combined and are restored to the original signal in a receiver. Wireless resources may be used efficiently by using cognitive radio technology.