Patent ID: 7609793

Claim:
A radio receiver comprising: one or more antenna to receive radio signals; a plurality of filters to selectively output signals in respective reception bands from the radio signals received by the antenna, adjacent reception bands partially overlapping each other; a plurality of down converters disposed correspondingly to the filters to conduct down-conversion from radio frequency to intermediate frequency on signals output from respective ones of the filters; a plurality of A/D converters disposed correspondingly to the down converters to convert the signals on intermediate frequency output from respective ones of the down converters to digital signals; extracting units to extract signal components of a boundary radio signal spreading across at least two reception bands adjacent to each other from digital signals associated with the at least two reception bands adjacent to each other; a combining unit to combine the signal components extracted by the extracting units to restore the boundary radio signal; and a demodulation unit to demodulate the boundary radio signal restored by the combining unit, wherein as regards down converters and A/D converters which conduct processing on the at least two reception bands adjacent to each other, a ratio of a down conversion frequency difference between the down converters to a sampling frequency used in the A/D converters is definite.