TRANSMISSION DEVICE AND TRANSMISSION METHOD

摘要

A transmission device includes: a plurality of transmission antennas; conversion means which prepares a plurality of signal sequences in accordance with a predetermined frequency bandwidth from at least one transmission stream associated with any one of the transmission antennas; precoding means which weights each of the signal sequences by a predetermined precoding vector selected from a codebook containing a plurality of precoding vectors; and means for converting the output signal from the precoding means into signals of the transmission antennas and transmitting the converted signals from the respective transmission antennas. In the precoding means, different precoding vectors are applied to different signal sequences and the correspondence between the different precoding vectors and the different signal sequences is decided by an open loop control not depending on a feedback from a reception device.