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    METHOD FOR APPLYING PREDISTORTION TO INPUT SIGNAL AND PREDISTORTION SYSTEM
    1.
    发明专利
    METHOD FOR APPLYING PREDISTORTION TO INPUT SIGNAL AND PREDISTORTION SYSTEM 审中-公开

    公开(公告)号：JP2003124752A

    公开(公告)日：2003-04-25

    申请号：JP2002222279

    申请日：2002-07-31

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GIARDINA CHARLES ROBERT ,  KIM JAEHYEONG ,  LAI HAOBO

    IPC: H03F1/32

    Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for applying predistortion to an input signal in order to remove the predistortion of an output signal. SOLUTION: In the predictive system and method to use an outer predistortion function for controlling a signal to be inputted to an inner predistortion function in order to control a signal to be inputted to a distortion generating circuit, the inner predistortion function reduces the distortion from the distortion generating circuit and the remaining distortion is reduced by the outer predistortion function. The inner predistortion function is determined by using the output of that function and the output of an amplifier. The outer predistortion function is determined by using output to that function and output to the inner predistortion function. Thus, a signal on a signal path is predistorted within a plurality of stages prior to amplification, predistortion caused by the amplification of the signal is canceled, and in an amplified signal obtained as a result, distortion is reduced.

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