Vaezi, Amir; Abdipour, Abdolali; Mohammadi, Abbas (Microwave/mm-Wave & Wireless Communication Research Lab, Radio Communication Centre of Excellence, Electrical Engineering Department, Amirkabir University of Technology, 424 Hafez. Ave, Tehran, Iran)
Nowadays, engineers seek for simulation and test procedures closer to the system’s final operation regime. Actually, telecommunications signals are usually modulated and aperiodic. In this paper, a new closed formulation of Envelope Transient HB appropriate for transient and steady state analysis of nonlinear active microwave circuits and systems is proposed. Then it is applied to a WiMAX power amplifier and confirmed with other methods. Finally, using the proposed CAD, we considered the effect of the nonlinearity of the power amplifier when driven with a 16-QAM modulated signal on the system performance. Thus the Symbol Error Rate (SER) degradation, and constellation performance reduction for various input power levels is evaluated.