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Identification of the Volterra kernels of nonlinear power amplifiers

: Schubert, B.; Liszewski, J.; Keusgen, W.


University of Electronic Science and Technology of China -UESTC-, Chengdu; Institute of Electrical and Electronics Engineers -IEEE-:
2009 International Conference on Communications, Circuits and Systems, ICCCAS 2009 . Proceedings. Vol.2 : Crowne Plaza Hotel, Milpitas, San Jose, California, USA and Jin Niu Hotel, Chengdu City, Sichuan, China, 23 - 25 July 2009
Piscataway, NJ: IEEE, 2009
ISBN: 978-1-424-44886-9
ISBN: 978-1-4244-4888-3
International Conference on Communications, Circuits and Systems (ICCCAS) <7, 2009, Milpitas/Calif., San Jose/Calif., Chengdu>
Fraunhofer HHI ()
Methode der kleinsten Quadrate; Leistungsverstärker; Reihenentwicklung

A method for identifying the Volterra model of a nonlinear power amplifier with memory is given. It first requires the estimation of the Volterra structure. The coefficients of the discrete-time series can then be calculated using a least-squares criterion, based on the known input and measured output samples. In the measurement part, an identified Volterra model is compared to the simpler quasi-memoryless model, described by a Taylor series. Second, two power amplifiers are compared by simulations and verified by measurements.