| 摘要 |
PROBLEM TO BE SOLVED: To restrain increase in transmission power and reduce interferences caused on other cells.SOLUTION: A radio resource determination unit 202 determines a channel bandwidth and a transmission power value by using a power gain estimate value for all users, a noise power estimate value, a transmission rate requested by each user, and a frequency band allocated to a device. A modulation parameter determination unit 208 determines modulation parameters such as a symbol rate, the number of subcarriers, a modulation method, and an encoding ratio of error correction code by using the channel bandwidth and the transmission rate. Modulation units 203-1 to 203-M perform modulation processing on input data Dto Daccording to the modulation parameters. Transmission power adjustment units 204-1 to 204-M adjust the transmission power of a transmission signal so that it matches the transmission power value calculated by the radio resource determination unit 202. A radio unit 205 transmits the transmission signal which has had its transmission power adjusted from an antenna. |
