Title :
Extending static models by using time series to identify the dynamical behavior
Author :
Wood, John ; Horn, Jason ; Root, David
Author_Institution :
Microwave Technol. Center, Agilent Technol., Inc., Santa Rosa, CA, USA
Abstract :
We use a simple, static model of an amplifier and augment the model by adding a nonlinear dynamical part in which the dynamics are identified using principles of time series analysis. The static part of the model is a polynomial nonlinearity in the input voltage, and is implemented using a built-in system amplifier model in ADS. The dynamic nonlinear part of the model is implemented using an artificial neural network. This new model is fast to simulate and extends the simple, single frequency system amplifier model to cover a wide bandwidth, maintaining good large-signal predictions.
Keywords :
nonlinear dynamical systems; nonlinear network analysis; power amplifiers; time series; artificial neural network; built-in system amplifier; dynamical behavior; large-signal prediction; nonlinear dynamics; polynomial nonlinearity; static model; time series analysis; Circuit simulation; Frequency; Microwave technology; Neural networks; Nonlinear dynamical systems; Polynomials; Predictive models; Robust stability; Transfer functions; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517129
