发明申请
- 专利标题： DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATING METHOD
- 专利标题（中）： 失真补偿装置和失真补偿方法
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申请号： US13461928申请日： 2012-05-02
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公开(公告)号： US20120288030A1公开(公告)日： 2012-11-15
- 发明人: Kazuo Nagatani , Hiroyoshi Ishikawa , Nobukazu Fudaba , Yuichi Utsunomiya
- 申请人： Kazuo Nagatani , Hiroyoshi Ishikawa , Nobukazu Fudaba , Yuichi Utsunomiya
- 申请人地址： JP Kawasaki-shi
- 专利权人： FUJITSU LIMITED
- 当前专利权人： FUJITSU LIMITED
- 当前专利权人地址： JP Kawasaki-shi
- 优先权： JP2011-105430 20110510
- 主分类号： H04L25/49
- IPC分类号： H04L25/49
摘要：
A distortion compensation device which reduces a distortion of an amplifier which is added to an output signal of the amplifier, the distortion compensation device including: a plurality of distortion compensation coefficient storage circuits which stores a plurality of distortion compensation coefficients and outputs the distortion compensation coefficients according to an amplitude of an input signal of the amplifier, a distortion compensating processing circuit which adds the distortion compensation coefficient output from each of the plurality of distortion compensation coefficient storage circuits to the input signal of the amplifier, and a distortion compensation coefficient updating circuit which performs weighting processing on the distortion compensation coefficient output from each of the plurality of distortion compensation coefficient storage circuits to reduce the distortion compensation coefficient and which calculates an update value of the distortion compensation coefficient by using the distortion compensation coefficient which is subjected to the weighting processing.