RECEIVING DEVICE AND MODULATION METHOD

摘要

PROBLEM TO BE SOLVED: To achieve reduction in a circuit scale and reduction in power consumption when signals on a plurality of channels are simultaneously received in a receiving device.SOLUTION: A calculation range control unit 106 sets a range of frequencies where Fourier transformation calculation is performed and gives instructions on the range to a frequency component detector 105. The frequency component detector 105 performs fast Fourier transformation of a digital signal output from an ADC 104 in the range on which the calculation range control unit 106 has given instructions, and detects a plurality of frequency components (FFT signal) of the digital signal. A channel shift unit 107 distributes the FFT signal output from the frequency component detector 105 to data from a channel 1 to a channel N, and outputs it to corresponding demodulation units 108.