Title :
Rational characterization for memoryless adaptive pre-distortion
Author :
Durney, Hugo ; Sala, Josep
Author_Institution :
Dept. of Signal Theor. & Commun., Univ. Politec. de Catalunya, Barcelona, Spain
Abstract :
In this paper we investigate an alternative characterization of the inverse AM/AM and AM/PM transfer curves of a high power amplifier (HPA), defining an adaptive algorithm for the optimum adjustment of the coefficients in a memoryless rational-based model used to pre-distort a base band signal with complex modulation in a quadrature non-linear model. Input signal statistics are unknown so its influence in the estimation is analyzed and compensation results are shown and compared with other previously proposed methods.
Keywords :
power amplifiers; signal processing; statistical analysis; AM/PM transfer curves; HPA; adaptive algorithm; base band signal; complex modulation; high power amplifier; input signal statistics; inverse AM/AM; memoryless adaptive predistortion; memoryless rational based model; optimum adjustment; quadrature nonlinear model; rational characterization; Abstracts; Modulation; OFDM; Optimization; Predistortion;
Conference_Titel :
Signal Processing Conference, 2002 11th European
Conference_Location :
Toulouse
