Patent ID: 6032032
Filing Date: 2000-02-29
Classification: H04B

Abstract:
A radio communication apparatus for at least first and second radio communication formats which prescribe first and second desired IF pass bandwidths respectively, the first desired IF pass bandwidth being greater than the second desired IF pass bandwidth, the apparatus comprising:an IF band-pass filter processing a first IF signal into a second IF signal and having a predetermined pass bandwidth corresponding to the first desired IF pass bandwidth, the IF bandpass filter performing an inadequate filtering process if the first IF signal is of the second radio communication format;a demodulator recovering a first baseband signal from the second IF signal generated by the IF band-pass filter;a baseband filter processing the first baseband signal generated by the demodulator into a second baseband signal if the first IF signal is of the second radio communication format, the baseband filter being capable of compensating for the inadequate filtering process performed by the IF bandpass filter; andmeans for selecting the first baseband signal generated by the demodulator as a final output signal when the first IF signal is of the first radio communication format, and for selecting the second baseband signal generated by the baseband filter as a final output signal when the first IF signal is of the second radio communication format.