Adaptive rf amplifier prelimiter

H - Electricity – 03 – G

Patent

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Details

H03G 11/04 (2006.01) H04B 7/005 (2006.01)

Patent

CA 2382024

The invention reduces transient peaks in signals transmitted in CDMA communication systems. A plurality of spread spectrum data signals are combined into a combined signal having fluctuating power level corresponding to the combination of the data signals. The combined signal is modulated to produce an RF signal for transmission. The average power of the combined signal is measured over a selected time period. The combined signal power level is adaptively limited to a calculated power level based at least in part on the measured power.

La présente invention permet de réduire les pics transitoires dans les signaux transmis dans des systèmes de communication AMRC. Une pluralité de signaux de données à spectre étalé sont combinés de manière à former un signal combiné présentant un niveau de puissance fluctuant correspondant à la combinaison des signaux de données. Ce signal combiné est modulé afin de produire un signal H. F. convenant pour la transmission. La puissance moyenne du signal combiné est mesurée pendant une période de temps prédéterminée. Le niveau de puissance du signal combiné est limité de manière adaptative à un niveau de puissance calculé, cette limitation dépendant au moins en partie de la puissance mesurée.

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