G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 19/00 (2006.01) G06F 17/10 (2006.01) H03F 1/32 (2006.01) H03G 1/00 (2006.01) H04L 27/36 (2006.01) H04L 27/00 (2006.01)
Patent
CA 2211613
Procedure and apparatus for modelling the AM/AM and AM/PM characteristics of an amplifier, and corresponding predistortion procedure. The invention concerns a procedure for modelling the AM/AM and AM/PM characteristics of an amplifier, comprising the following steps: - transmission (11) of a reference signal to the said amplifier; - digitization (13) of the said amplifier's response to the said reference signal, so as to produce two sets of respectively AM/AM and AM/PM reference samples; - determination (14) from the said samples of two series of polynomials respectively representing the said AM/AM and AM/PM characteristics, taking into account the second derivative of the said polynomial and the distances between the said samples and the points in the curve defined by the polynomial. It is thus possible to obtain characteristics which have been smoothed out.
Procédé et dispositif de modélisation des caractéristiques AM/AM et AM/PM d'un amplificateur, et procédé de prédistorsion correspondant. L' invention concerne un procédé de modélisation des caractéristiques AM/AM et AM/PM d'un amplificateur, comprenant les étapes suivantes: - transmission (11) d'un signal de référence audit amplificateur; - numérisation (13) de la réponse dudit amplificateur audit signal de référence, de façon à produire deux ensembles d'échantillons de référence AM/AM et AM/PM respectivement; - détermination (14) de deux séries de polynômes représentatifs respectivement desdites caractéristiques AM/AM et AM/PM, à partir desdits échantillons, tenant compte d'une part de la dérivée seconde dudit polynôme, et d'autre part des distances entre lesdits échantillons et les points de la courbe définie par le polynôme. Il est ainsi possible d'obtenir des caractéristiques lissées.
Marchesani Rossano
Sehier Philippe
Alcatel Telspace
Robic
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