Circuit and method for providing a RF signal with pre-distortion

A transmitter (TX) sends out a signal (S) with a transmitter station and a message-transmission system. Before conversion into a high-frequency (HF) state, this signal is digitally distorted in a base-band state via digital signal-processors (DSP,PRD) controlled by a feedback signal (ACP) generated...

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Bibliographic Details
Main Authors BAUERNSCHMITT, RUEDIGER NAT, WOELFLE, GERD
Format Patent
LanguageEnglish
French
German
Published 04.06.2008
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:A transmitter (TX) sends out a signal (S) with a transmitter station and a message-transmission system. Before conversion into a high-frequency (HF) state, this signal is digitally distorted in a base-band state via digital signal-processors (DSP,PRD) controlled by a feedback signal (ACP) generated by a detector (DET) that leaves out a signal (S') in the HF state within first and second frequency ranges inside and outside transmission spectra respectively. Independent claims are also included for a transmitter for transmitting a signal with a pre-emphasizing stage to pre-emphasize the transmission signal and a downstream power amplifier, for a transmission station to work with the transmitter and for a message-transmission system (UMTS) to work with the transmitter and the transmission station.
Bibliography:Application Number: EP20010440167