Patent ID: 8160529

Claim:
A radio frequency (RF) receiver comprising: a local oscillator (LO) module configured to (i) receive a control signal and (ii) generate a LO signal at a LO frequency, wherein the LO frequency is generated based on the control signal; a LO mixer module configured to generate an intermediate frequency (IF) signal based on (i) a radio frequency (RF) signal and (ii) the LO signal; a complex intermediate frequency (IF) mixer module configured to generate a baseband signal based on (i) the IF signal and (ii) an IF oscillator signal; and a channel monitoring module configured to generate the control signal based on the baseband signal, wherein: the channel monitoring module is configured to sequence the LO frequency through a plurality of frequencies; the plurality of frequencies include (i) a frequency that is greater than a frequency of the RF signal and (ii) a frequency that is less than the frequency of the RF signal; for each of the plurality of frequencies, the channel monitoring module is configured to determine a ratio between (i) a wanted signal of the baseband signal and (ii) an image signal of the baseband signal; and the channel monitoring module generates the control signal based on one of the ratios.