| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce peak electric power for transmission without generating any nonlinear distortion and without reducing transmission efficiency, in radio communication for performing multi-antenna transmission. <P>SOLUTION: A data exchanging unit 120 exchanges data to be located in subcarrier of each of groups between data streams in every group unit of the subcarrier based on control information outputted from an exchange pattern deciding unit 190. Each of electric power measuring units 160-1 to 160-n measures the electric power of OFDM symbol of each of the data streams, compares with a predetermined threshold value, and outputs the measured result of the electric power to the exchange pattern deciding unit 190 when the electric power of the OFDM symbol is decided to exceed the predetermined threshold value after comparing. The exchange pattern deciding unit 190 decides an exchange pattern for exchanging data of the data stream which has larger measured value of the electric power than the predetermined threshold value, and outputs the data to the data exchanging unit 120 as the control information. <P>COPYRIGHT: (C)2004,JPO |
