| 摘要 |
PROBLEM TO BE SOLVED: To ensure high communication quality by reducing the effects of an interferential radio wave or a noise, even if each carrier is modulated by a multilevel modulation system which has information component in an amplitude. SOLUTION: This device consists of a transmission system, which transforms plural sub-carriers which are generated by mapping transmission information with complex symbols into a time sevies signal by an inverse Fourier transform and transmits it and a reception system, which demaps the complex symbols included in plural sub- carriers that are Fourier transformed and extracted and reproduces the transmission information. The reception system is equipped with a correction symbol detector 25 for detecting a symbol to be amplitude-corrected from a reception complex symbol, a reception amplitude corrector 26 and a reception amplitude correction controller 29 for performing amplitude correction on the complex symbol on the basis of this detection result. The transmission system is equipped with a disturbance wave detector 16 for detecting the disturbance wave in each sub-carrier frequency, a transmission amplitude corrector 3 and a transmission amplitude correction controller 17 for correcting the amplitude of the transmission complex symbol in a frequency of the detected disturbance wave. |
