APPARATUS AND METHOD FOR WIRELESS DATA COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To achieve a simple apparatus configuration and to reduce out-of-band noise and delay in a wireless data communication apparatus and a wireless data communication method. SOLUTION: A wireless data transmission apparatus for wirelessly transmitting a transmission signal by an orthogonal frequency division multiplex system is provided with: a reverse phase signal generation means 5 for generating a reverse phase signal of the transmission signal; an amplitude control means 6 for controlling the amplitude of the reverse phase signal; a band limitation means 7 for limiting the amplitude-controlled reverse phase signal to a band narrower than a communication band; and a signal synthesis means 9 for synthesizing the transmission signal and the band-limited reverse phase signal. The amplitude control means 6 logarithmically controls the amplitude of the reverse phase signal in accordance with the level of transmission power exceeding a prescribed threshold. COPYRIGHT: (C)2007,JPO&INPIT