Patent ID: 8862087
Filing Date: 2014-10-14
Classification: H04B

Abstract:
1. A method for reciprocal-mixing noise cancellation, the method comprising: receiving a first signal from a first mixer, the 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 by mixing at a second mixer the first signal with a third signal, the third signal being a narrow signal at a third frequency, wherein the third frequency is related to a blocker offset frequency; applying a gain to the second signal to generate an amplified second signal; subtracting the amplified second signal from the first signal to generate a fourth signal; and filtering the fourth signal to remove a reciprocal-mixing noise and generating the wanted signal at the first frequency without the reciprocal-mixing noise.