Security performance is improved by a software radio transceiver which can exchange software which is used for demodulation. A radio communication unit receives a radio signal. A conversion unit converts the radio signal received by the radio communication unit into digital data. The transceiver has a plurality of demodulating units which demodulate sub-data. A dividing unit divides the digital data converted by the conversion unit and distributes the sub-data to the plurality of demodulating units. A connection unit connects results obtained after the sub-data divided and distributed to the plurality of demodulating units by the dividing unit was demodulated by each of the demodulating units.