TRANSMISSION METHOD, TRANSMISSION DEVICE, RECEPTION METHOD AND RECEPTION DEVICE

摘要

PROBLEM TO BE SOLVED: To enhance the reception quality under an environment where direct waves are dominant in a transmission method for simultaneously transmitting plural modulation signals containing a basic stream and an extended stream from plural antennas.SOLUTION: In a transmission method for simultaneously transmitting a first modulation signal and a second modulation signal at the same frequency, a base band signal after first mapping and a base band signal after second mapping are multiplied by a pre-coding weight. In a pre-coding weight multiplier (weighting synthesizing part 600) for outputting the first modulation signal and the second modulation signal, a precoding method for changing the precoding weight regularly is set as a precoding method for the extended stream.SELECTED DRAWING: Figure 6