发明授权
- 专利标题: Predistorter
- 专利标题(中): 预失真器
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申请号: US12289247申请日: 2008-10-23
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公开(公告)号: US07944295B2公开(公告)日: 2011-05-17
- 发明人: Naoki Hongo , Manabu Nakamura , Takehiko Kobayashi , Yoshihiko Akaiwa
- 申请人: Naoki Hongo , Manabu Nakamura , Takehiko Kobayashi , Yoshihiko Akaiwa
- 申请人地址: JP Tokyo
- 专利权人: Hitachi Kokusai Electric Inc.
- 当前专利权人: Hitachi Kokusai Electric Inc.
- 当前专利权人地址: JP Tokyo
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: JP2007-285032 20071101
- 主分类号: H03F1/26
- IPC分类号: H03F1/26
摘要:
The invention aims to converge predistortion coefficients efficiently in a predistorter adapted to compensate for distortion generated in an amplifier. Level detection means detects the level of a signal input to an amplifier. Signal acquisition means acquire a signal output from the amplifier as a feedback signal. Correspondence acquisition means updates a predistortion coefficient expressed using a set of orthogonal polynomials so that a distortion component contained in the acquired feedback signal is reduced and acquires a correspondence between the level of the signal input to the amplifier and a control coefficient for predistortion (contents of a distortion compensation table). Predistortion executing means applies distortion for predistortion with respect to the signal input to the amplifier in accordance with the control coefficient for predistortion that corresponds to the detected level based on the acquired correspondence.
公开/授权文献
- US20090115513A1 Predistorter 公开/授权日:2009-05-07
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