Patent ID: 8824446

Claim:
A transmission device that includes a plurality of transmission antennas and constitutes a wireless communication system with a receiving device that includes a plurality of reception antennas, the transmission device comprising: a signal generating unit that outputs a plurality of series of signals, where a number of the series of signals is smaller than number of the transmission antennas; and a plurality of transmission blocks including at least two transmission antennas corresponding to each of the series of signals output from the signal generating unit, wherein each of the transmission blocks includes: a branching unit that branches a series of signals corresponding to the block into a plurality of transmission signals passing through a plurality of signal lines corresponding to transmission antennas included in the block, and a transmission delay unit that is provided on at least one of the signal lines and applies a delay to a transmission signal, and when a transmission signal branched by the branching unit is applied with a delay by the transmission delay unit, the transmission device takes the transmission signal on which the delay is applied as the transmission signal, and transmits the transmission signals to the receiving device via transmission antennas included in the transmission block, wherein the transmission delay unit determines a delay amount to be applied to the transmission signal based on a number of the plurality of reception antennas and a number of the plurality of transmission antennas, and wherein the transmission delay unit determines the delay amount to be applied to the transmission signal based upon 1/((MN−1)(ΔF)), wherein M is the number of the plurality of transmission antennas, N is the number of the plurality of reception antennas, and ΔF is a bandwidth of the transmission signal.