Patent ID: 8693598

Claim:
A wireless radio receiver comprising: a plurality of mitigation modules, each mitigation module configured to track the frequency of a spurious tone, the spurious tone being of at least one of a static frequency or dynamically drifting frequency, and to suppress the spurious tone each mitigation module including a mixer with phase compensation, the mixer configured to receive a complex input signal and phase rotation information from a previous stage, to remove the phase rotation from the previous stage, to impart a second phase rotation on the signal to move a second spurious tone to substantially zero Hz, and to send second phase rotation information to a subsequent stage; in which each mitigation module includes a DC separator configured to split the output of the mixer into a DC component and a non-DC component and to send out the non-DC component as the complex signal output; a frequency detector configured to detect and output the frequency of the DC component; and a frequency lock loop (FLL) filter configured to filter an output of the frequency detector and to drive the mixer with phase compensation to force the drifting frequency of the DC component to substantially zero Hz.