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Simulation of nonlinear RF circuits driven by multi-carrier modulated signals

The simulation of nonlinear RF circuits driven by digitally-modulated signals with multiple carriers is addressed by combining the envelope transient harmonic balance method with the artificial frequency mapping technique. Specific application examples are considered, in particular the modeling of OFDM-based communications circuits. A mixer subject to a modulated RF signal and an amplifier excited by a multi-carrier modulated stimulus are studied. Here an envelope time-marching scheme is coupled to an artificial frequency mapping based harmonic balance engine.