Patent ID: 8060046
Filing Date: 2011-11-15
Classification: H04B

Abstract:
1. A radio receiver comprising: a mixer configured to convert a received signal to an intermediate frequency (IF) signal using a local oscillation signal; an IF processing section configured to limit the band of the IF signal and output the band-limited signal; a detection section configured to demodulate the band-limited IF signal from the IF processing section; a frequency control section configured to output a frequency control signal corresponding to a desired signal; and a local oscillation section configured to generate the local oscillation signal having a frequency corresponding to the desired signal according to the frequency control signal, wherein the frequency control section outputs a plurality of set values sequentially as the frequency control signal to change the frequency of the local oscillation signal so that the difference from the frequency corresponding to the desired signal is not more than the frequency of the IF signal, and determines a set value among the plurality of set values with which a corresponding image signal strength is lowest and outputs such a set value as the frequency control signal.