MULTICARRIER TRANSMITTER, MULTICARRIER RECEIVER, AND MULTICARRIER WIRELESS COMMUNICATION METHOD

摘要

The pilot signal generation section 103 generates pilot signals in such a way that the pilot signals have a predetermined time-varying pattern on pilot carriers. The pilot signal insertion section 104 allows the pilot carriers to carry only pilot signals. The apparatus on the receiving side carries out channel estimation by correlating the plurality of pilot signals carried on the pilot carriers with the same pattern as that used on the transmitting side. Furthermore, the apparatus on the transmitting side sends pilot signals having a time-varying pattern carried on subcarriers involving DC components which would not be used for information transmission by conventional multicarriers. This makes it possible to improve the transmission efficiency in a radio communication based on a multicarrier modulation system.