Patent ID: 8090333

Claim:
A receiving apparatus comprising: a demodulating means for demodulating an IF signal obtained by subjecting a received RF signal to frequency conversion; a detecting means for detecting a carrier wave frequency error contained in the IF signal; a frequency control means for setting an initial value of a frequency used in the demodulation process done by the demodulating means and for correcting a frequency error of the frequency used for the demodulation process done by the demodulating means based on the carrier wave frequency error detected by the detecting means; and a control means for controlling the setting of the initial value of the frequency used in the demodulation process done by the demodulating means by means of the frequency control means after a receiving channel is switched, based on the carrier wave frequency error before the receiving channel is switched, the initial value of the frequency is set by adding an IF signal frequency error to a desired IF signal frequency, and the IF signal frequency error is computed by multiplying the carrier wave frequency error before the receiving channel is switched by a ratio of frequencies.