Transmitter

Patent Pending A transmitter in a wireless communication system is provided with: a signal synthesiser, which synthesises respective analogue signals, obtained by carrying out serial-parallel conversion on input digital signal sequences and inputting the signals into a plurality of DA converters, into at least two outputs combined with input lines; a plurality of quadrature modulation mixers, which modulate the analogue signals integrated and output by the signal synthesiser into quadrature modulated RF signals; and a plurality of RF amplifiers which amplify the plurality of quadrature modulated RF signals from the quadrature modulation mixers to correspond to individual subcarrier frequencies.