Radio with peak power and bandwidth efficient modulation

H - Electricity – 04 – L

Patent

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H04L 27/36 (2006.01)

Patent

CA 2224572

A communication device (300) includes a digital modulator (301), a Digital Signal Processor (306), and an amplifier (312). The digital modulator (301) includes an information generator (304) and a peak suppression device (402). The peak suppression device (402) includes a symbol mapper (404) and a symbol scaler (406). The information generated by the generator (401) are mapped on a constellation diagram via the symbol mapper (404). The mapped information is then scaled at the scaler (406) in order to reduce the peak-to-average ratio of the signal at the input to the amplifier (312).

Dispositif de télécommunications (300) comprenant un modulateur numérique (301), un processeur de signaux numériques (306) et un amplificateur (312). Le modulateur numérique (301) comprend un générateur d'informations (304) et un dispositif de suppression de crête (402). Le dispositif de suppression de crête (402) comprend un système (404) de topographie de symboles et un système (406) de mise à l'échelle de symboles. Les informations produites par le générateur (401) sont reportées sur un diagramme de constellation par l'intermédiaire du système (404) de topographie de symboles. Ces informations de topographie sont ensuite mises à l'échelle au niveau du système (406) de mise à l'échelle, de manière à diminuer le rapport entre la crête et la moyenne du signal au niveau de l'entrée de l'amplificateur (312).

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