A radio communication device performs baseband processing by subjecting a received signal to an AD conversion at a predetermined sampling frequency and converting a digital signal resulting from the AD conversion into a baseband signal by frequency conversion. The device includes a frequency converting unit configured to convert the resulting digital signal into a complex baseband signal. The device further includes a waveform shaping unit configured to subject the baseband signal to waveform shaping, and a down-sampling unit configured to subject the baseband signal to sample discrete reduction.