<p>A transmitter for transmitting a signal to a plurality of antennas includes: a transmission unit for giving an initial phase to an inputted signal by selecting the size of the initial phase for output to at least one of the antennas according to a communication time band and giving a delay for each of the antennas as the destination and for each communication time band or communication frequency; and a quality information reception unit for acquiring reception quality information on the signal transmitted by the transmission unit from a communication partner terminal.</p>
