Method and system for reciprocal mixing cancellation of wideband modulated blockers

A system for reciprocal mixing noise cancellation, the system comprising:

• a carrier recovery module configured to generate a second signal using a first signal received from a first mixer, wherein:
• a) the first signal comprises a wanted signal at a first frequency and a modulated signal at a second frequency, the modulated signal is generated as a product of a reciprocal-mixing of an unwanted signal with a phase noise,
• b) the second frequency is greater than the first frequency,
• c) at least a portion of the modulated signal overlaps the wanted signal, adding a reciprocal-mixing noise to the wanted signal, and
• d) the second signal is a narrow signal at a third frequency, wherein the third frequency is twice the second frequency;
• a second mixer circuit to mix the second signal with the first signal to generate a third signal;
• and
• a subtraction circuit to subtract the third signal from the first signal to remove a reciprocal-mixing noise and generate the wanted signal at the first frequency without the reciprocal-mixing noise.

A non-transitory machine-readable medium embodying instructions that, when executed by a machine, allow the machine to perform a method for reciprocal-mixing noise cancellation, the method comprising:

• receiving a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency, the modulated signal resulting from a reciprocal-mixing of an unwanted signal with a phase noise, wherein the second frequency is greater than the first frequency, and at least a portion of the modulated signal overlaps the wanted signal, adding a reciprocal-mixing noise to the wanted signal;
• generating a second signal using the first signal, the second signal being a narrow signal at a third frequency, wherein the third frequency is twice the second frequency;
• mixing the second signal with the first signal to generate a third signal;
• and
• subtracting the third signal from the first signal to remove a reciprocal-mixing noise and generate the wanted signal at the first frequency without the reciprocal-mixing noise.