Title :
A nonlinear ARMA model for simulating power amplifiers
Author :
Chrisikos, G. ; Clark, C.J. ; Moulthrop, A.A. ; Muha, M.S. ; Silva, C.P.
Author_Institution :
Aerosp. Corp., El Segundo, CA, USA
Abstract :
This paper presents an improved model for wideband simulation of nonlinear power amplifiers. The commonly used memoryless envelope model is limited to use on narrowband signals. The new model includes an auto-regressive moving average (ARMA) filter to improve performance predictions for wideband signals. Optimization of the model is performed using measurements of time-domain pulse envelopes. The new model is constructed for a 20 GHz helix traveling-wave tube amplifier (TWTA) and compared to the memoryless envelope model for predicting distortion with wideband signals.
Keywords :
autoregressive moving average processes; nonlinear network analysis; power amplifiers; travelling wave amplifiers; wideband amplifiers; 20 GHz; auto-regressive moving average filter; distortion prediction; helix TWT amplifier; nonlinear ARMA model; nonlinear power amplifiers; performance predictions; power amplifier simulation; time-domain pulse envelopes; traveling-wave tube amplifier; wideband signals; wideband simulation; Broadband amplifiers; Distortion measurement; Filters; Narrowband; Performance evaluation; Power amplifiers; Predictive models; Pulse amplifiers; Pulse measurements; Wideband;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705095
