Image-rejection-performance assessment of double-conversion wireless receiver with 3-phase complex filter using Montecarlo simulation

This paper discusses the relation between the image-rejection performance and the dispersion of device parameters for a double-conversion wireless receiver with a 3-phase active RC complex filter using Monte Carlo simulation. The double-conversion architecture corrects the gain and phase mismatches of 3-phase adjacent image signals, and the image-rejection ratio of the adjacent image depends mainly on RC mismatches in the complex filter. Monte Carlo simulations with 0.1-% RC dispersion and 0.3-% transistor-width dispersion show that image rejection of more than 60 dB can be expected.