Adaptive pre-distortion of an amplitude- and frequency- or...

Details Adaptive pre-distortion of an amplitude- and frequency- or... Adaptive pre-distortion of an amplitude- and frequency- or...

H - Electricity

04

L

H04L 27/36 (2006.01)

Patent

CA 2446541

The invention relates to an amplitude- and frequency- or phase-modulated radio frequency signal generator (G) that is used for radio emission, comprising: means for generating (GEN) a phase or frequency control signal (D) and an amplitude control signal (F) from a phase or frequency modulation signal (B) and an amplitude modulation signal (C); phase or frequency modulation means (MOD); and a variable-gain radio frequency power amplifier (PA). Said generation means (GEN) comprise means for automatically controlling the amplitude of the output signal (G), and, in addition, adaptive pre-distortion means (40) which are arranged in order to pre-distort the phase or frequency control signal (D) in accordance with the amplitude modulation signal (C) during a permanent operating phase and, during a learning phase, to be adapted from the amplitude modulation signal (C) and from the amplitude control signal (F).

L'Invention propose un générateur d'un signal radiofréquence(G) modulé en phase ou fréquence et en amplitude convenant pour l'émission radioélectrique, comprenant des moyens de génération (GEN) d'un signal de commande de phase ou de fréquence (D) et d'un signal de commande d'amplitude (F), à partir d'un signal de modulation de phase ou de fréquence (B) et d'un signal de modulation d'amplitude (C), des moyens de modulation de phase ou de fréquence (MOD), et un amplificateur de puissance radiofréquence (PA) à gain variable, dans lequel les moyens de génération (GEN) comprennent des moyens d'asservissement de l'amplitude du signal de sortie (G), et, en outre, des moyens de pré- distorsion adaptative (40) qui sont agencés pour, pendant une phase de fonctionnement permanent, réaliser une pré-distorsion du signal de commande de phase ou de fréquence (D) en fonction du signal de modulation d'amplitude (C), et pour, pendant une phase d'apprentissage, être adaptés à partir du signal de modulation d'amplitude (C) et du signal de commande d'amplitude (F).

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