OFDM COMMUNICATION DEVICE

摘要

An OFDM communication device determines the number of transmission line estimating known signals to be inserted into a transmission signal on the basis of the line quality between the device and a communicating party. The transmission signal to the communicating party by subjecting an information signal and the transmission line estimating known signals the number of which is determined by the determining means to inverse transform. The device can improve both the error rate characteristics of a modulated signal and the transmission efficiency of the information signal.