Patent ID: 7447169

Claim:
A TDMA radio communication system that uses a multiple subcarrier modulation method, comprising: at least a first and a second radio station, wherein said first radio station carries out communications by selecting and then modulating only a subcarrier with which a desired transfer rate can be obtained in said second radio station, wherein said second radio station includes: a power detection unit detecting a received power for each subcarrier and detecting an interference power from another radio station with which said second radio station is communicating; and a notification unit notifying said first radio station of information regarding said received power and said interference power detected by said power detection unit, and wherein said first radio station includes: a subcarrier selection unit selecting, based on a reception state and an interference state of each subcarrier that have been returned from said second radio station, only a subcarrier with which a desired transmission rate can be achieved in said second radio station, wherein only the subcarrier that has been selected by said subcarrier selection unit is selected and modulated for communication.