| 摘要 |
PROBLEM TO BE SOLVED: To improve reception quality in an environment in which a direct wave is dominant, in a transmission method for simultaneously transmitting a plurality of modulation signals from a plurality of antennas.SOLUTION: A transmission method transmits a first modulation signal and a second modulation signal simultaneously at the same frequency. By: performing precoding on the both signals by using a fixed precoding matrix; and in addition, regularly switching the phase of at least one of the first modulation signal and the second modulation signal to transmit them, the reception quality of data improves in a reception device. |
