RECEPTION DEVICE, METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To quickly select an antenna and to adjust a gain.

SOLUTION: An IF filter 38 limits the frequency band of the signals of an intermediate frequency so as to make the components of a modulation band pass through. A filter 39 for reception power detection limits the frequency band of the signals of the intermediate frequency with less delay. A detection circuit 44, an A/D converter 45 and an antenna selection part 62 detect the power of radio waves received by a plurality of the antennas respectively on the basis of the signals whose frequency band is limited by the filter 39 for the reception power detection. The antenna selection part 62 selects one of a plurality of the antennas on the basis of the detected power. An AGC control part 61 adjusts the gain of the amplification of the signals corresponding to the selected antenna on the basis of the signals whose frequency band is limited by the IF filter 38.

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