Predistortion circuit and method for predistorting a signal

A predistortion circuit for countering interference affecting a digital signal during transmission over a transmission link comprises a path of the digital signal between a mapper at a transmitter side and a demapper at a receiver side. The predistortion circuit is arranged for receiving a version o...

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Bibliographic Details
Main Author SIMOENS FREDERIK
Format Patent
LanguageEnglish
Published 15.03.2016
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
JAMMING OF COMMUNICATION
SECRET COMMUNICATION
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A predistortion circuit for countering interference affecting a digital signal during transmission over a transmission link comprises a path of the digital signal between a mapper at a transmitter side and a demapper at a receiver side. The predistortion circuit is arranged for receiving a version of a digital symbol selected from a predefined constellation used for mapping a bit stream, and includes at least one correction stage provided with a correction path arranged for determining a correction term as a function of the output of a model equivalent to the transmission link and a corresponding symbol of a target constellation. The position of the target constellation points is determined using a measure accounting for the transmission link. The predistortion circuit is arranged for adding the correction term to the received version of the digital symbol and outputting the result of adding as an updated version of the digital symbol.
Bibliography:Application Number: US201414766821