Patent ID: 7787824

Claim:
A transmission device in a multi-output type, comprising: a plurality of antennas that generate in a multi-carrier manner at least a first beam outputting frequency multiplexed signals weighted by different values from the plurality of antennas, and a second beam outputting frequency multiplexed signals weighted by different values from the plurality of antennas, wherein: frequency zones in which no carrier is disposed are provided in multi-carriers output by the first beam and the second beam, for the purpose of distinguishing radio waves of the first beam and the second beam, wherein the frequency zones are different between the first beam and the second beam, and the plurality of antennas include three or more antennas that generate respective three or more beams, and one beam generated by one antenna of the three or more antennas does not output a signal while the other beams generated by the other antennas of the three or more antennas output respective signals.