A wireless communication system that communicates by an electromagnetic wave, the wireless communication system comprising: a first wireless device that includes a transmission rotationally polarized wave frequency generator (4, 5) for giving a rotation period to a polarized wave of the electromagnetic wave to be transmitted, and is configured to transmit a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator (4, 5), and to transmit data by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator (4, 5); and a second wireless device that includes a reception rotationally polarized wave frequency generator (18, 19) for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, and is configured to calculate transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator (18, 19), and to set a signal included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator (18, 19) as data based on the calculated transmission timing, characterized in that the first wireless device is configured to alternately transmit • a signal of the synchronization code at a data rate corresponding to a first frequency higher than a second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator, and • a signal of data at a data rate corresponding to a third frequency lower than the second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator. a first wireless device that includes a transmission rotationally polarized wave frequency generator (4, 5) for giving a rotation period to a polarized wave of the electromagnetic wave to be transmitted, and is configured to transmit a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator (4, 5), and to transmit data by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator (4, 5); and a second wireless device that includes a reception rotationally polarized wave frequency generator (18, 19) for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, and is configured to calculate transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator (18, 19), and to set a signal included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator (18, 19) as data based on the calculated transmission timing, characterized in that the first wireless device is configured to alternately transmit • a signal of the synchronization code at a data rate corresponding to a first frequency higher than a second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator, and • a signal of data at a data rate corresponding to a third frequency lower than the second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator. • a signal of the synchronization code at a data rate corresponding to a first frequency higher than a second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator, and • a signal of data at a data rate corresponding to a third frequency lower than the second frequency corresponding to the rotation period given by the transmission rotationally polarized wave frequency generator.