New method for phase characterization of nonlinear distortion products

This paper presents a new method for phase characterization of nonlinear mixing products based on statistical averages of signal windows captured by a synchronous two-channel sampler. Passing some of the signal processing operations, previously performed by complex laboratorial arrangements, to the digital domain, the present method simplifies the measurement bench and allows absolute phase measurements, i.e., not depending on any arbitrarily selected phase reference nonlinearity.