Volume 39 Issue 7
Jul.  2013
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Liao Yi, Su Donglin, Wu Qi, et al. Pruning the Volterra series for behavioral modeling of power amplifiers[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(7): 990-994. (in Chinese)
Citation: Liao Yi, Su Donglin, Wu Qi, et al. Pruning the Volterra series for behavioral modeling of power amplifiers[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(7): 990-994. (in Chinese)

Pruning the Volterra series for behavioral modeling of power amplifiers

  • Received Date: 07 Aug 2012
  • Publish Date: 30 Jul 2013
  • General Volterra series based models are limited to weakly nonlinear systems due to their high complexity. It involves a great number of coefficients for behavioral modeling of power amplifier with strong nonlinearities and long memory effects. The behavioral modeling of radio frequency (RF) power amplifiers was studied. A pruned Volterra series based model was proposed by introducing a ‘near-diagonality’controlling factor and a ‘dynamic deviation reduction’ controlling factor simultaneously to remove the coefficients which are not sensitive to the output error. The pruning approach could effectively reduce the model complexity and save time for parameters extraction under the condition of the model fidelity required. A 10 W RF power amplifier was employed for providing input and output data which were used in model extraction and validation. The agreement obtained between the output response of simulated circuit and model validates the pruned model is flexible and effective.

     

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