发明授权
EP1258079B1 SYSTEM FOR PRE-DISTORTING AN INPUT SIGNAL FOR A POWER AMPLIFIER USING NON-ORTHOGONAL COORDINATES
有权
DEVICE FOR A预失真输入信号功率放大器利用非正交坐标
- 专利标题： SYSTEM FOR PRE-DISTORTING AN INPUT SIGNAL FOR A POWER AMPLIFIER USING NON-ORTHOGONAL COORDINATES
- 专利标题（中）： DEVICE FOR A预失真输入信号功率放大器利用非正交坐标
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申请号： EP00910707.9申请日： 2000-02-24
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公开(公告)号： EP1258079B1公开(公告)日： 2003-09-10
- 发明人: PERTHOLD, Rainer , ULBRICHT, Gerald , GERHÄUSER, Heinz
- 申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 申请人地址： Leonrodstrasse 54 80636 München DE
- 专利权人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人地址： Leonrodstrasse 54 80636 München DE
- 代理机构： Schoppe, Fritz, Dipl.-Ing.
- 国际公布： WO01063752 20010830
- 主分类号： H03F1/32
- IPC分类号： H03F1/32
摘要：
A circuit for pre-distorting an input signal v to be transmitted via a power amplifier having a non-linear transmission characteristic to produce a pre-distorted input signal y comprises an estimator (10) for determining an estimation signal (22) based on the power of said input signal v . A look-up table (20) is provided for storing complex pre-distortion coefficients BR and AI which depend on the power of the input Signal v and the non-linear transmission characteristic of the power amplifier determined in advance. For BR, the relation BR = AR - K, K being a constant with 0 v such that the distortion introduced by the non-linear transmission characteristic of the power amplifier is substantially compensated according to magnitude and phase. Finally, a pre-distorter is provided in order to pre-distort the input signal according to y = v • (K + BR + jAI).
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