A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second signal received by a second antenna to generate a phase-shifted signal; first and second mixers for respectively mixing signals generated by said first and second signal adjusting units to generate respective first and second intermediate frequency signals; a signal combiner for generating an output signal provided to a demodulator, the output signal comprising at least one of the first intermediate frequency signal and/or the second intermediate frequency signal; and a phase detector for extracting phase information from the signals generated by the first and second signal adjusting units.