Harmonic cancellation for frequency conversion harmonic cancellation

A system comprising:

• a harmonic cancellation circuit comprising:
• a primary signal path to generate a first intermediate frequency (IF) signal by mixing an RF signal with a first reference signal;
• a first harmonic feedforward signal path to generate a second IF signal representing signal content of the RF signal near an nth-order harmonic of a frequency fLO of the first reference signal, n comprising a positive integer;
• and
• a summation stage to generate a third IF signal based on a difference between the first IF signal and the second IF signal.

In a radio frequency (RF) receiver, a method comprising:

• mixing an RF signal with a first reference signal having a frequency fLO to generate a primary IF signal;
• for each harmonic of a plurality of harmonics of the frequency fLO:
• generating a corresponding harmonic feedforward signal representative of signal content of the RF signal near the harmonic and downscaled based on a Fourier series coefficient associated with the harmonic;
• and
• modifying the primary IF signal based on the harmonic feedforward signal.