An apparatus and method for receiving RF signals in a RF communication
system are provided. The apparatus for receiving RF signals comprises a
pre-processing unit for bandpass-filtering a signal received through an
external antenna with a predetermined bandwidth and extracting a RF input
signal having a desired frequency; a mixing unit for mixing the RF input
signal provided from the pre-processing unit with a local oscillation
signal having the same frequency as the RF input signal and generating a
desired baseband signal; a noise-free-signal amplifying unit for shifting
the desired baseband signal to a band that is free of effects due to 1/f
noise, amplifying the shifted baseband signal, and re-shifting the
amplified signal to the baseband; and a baseband processing unit for
selecting a desired channel signal from the amplified baseband signal to
be provided from the noise-free-signal amplifying unit and amplifying the
selected signal.