Modeling nonlinear communication ICs using a multivariate formulation

We present a technique for modeling nonlinear distortion of multirate time-varying communication circuits. To properly consider the weakly nonlinear distortion effects in circuits with multiple large-signal excitations, we capture the quasiperiodic boundary condition of the system Volterra kernels using a multivariate formulation. We then extend the model order reduction work of P. Li et al. (2003) to reduce this large multivariate representation for compact modeling. The proposed approach is demonstrated on a heterodyne front-end receiver.