发明名称 |
DISTORTION COMPENSATION APPARATUS AND DISTORTION COMPENSATION METHOD |
摘要 |
A distortion compensation apparatus includes: a storage unit that stores a distortion compensation coefficient; a distortion-compensation-coefficient selecting unit that takes a logarithm of power of an input signal and exponentiates a value obtained by taking the logarithm, and that selects a distortion compensation coefficient that is stored in the storage unit according to a value obtained by the exponentiating; a distortion-compensation processing unit that acquires the selected distortion compensation coefficient from the storage unit, and that performs distortion compensation processing on the input signal to the distortion-compensation-coefficient selecting unit using the acquired distortion compensation coefficient; an amplifier that amplifies the signal subjected to the distortion compensation processing; and a distortion-compensation-coefficient updating unit that updates the distortion compensation coefficient stored in the storage unit based on the amplified signal and the input signal to the distortion-compensation-coefficient selecting unit. |
申请公布号 |
US2015077180(A1) |
申请公布日期 |
2015.03.19 |
申请号 |
US201414552120 |
申请日期 |
2014.11.24 |
申请人 |
FUJITSU LIMITED |
发明人 |
Matsubara Satoshi;Hamano Mitsuharu;Shako Hideharu |
分类号 |
H03F1/32;H03F3/21 |
主分类号 |
H03F1/32 |
代理机构 |
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代理人 |
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主权项 |
1. A distortion compensation apparatus comprising:
a storage unit that stores a distortion compensation coefficient; a distortion-compensation-coefficient selecting unit that takes a logarithm of power of an input signal and exponentiates a value obtained by taking the logarithm, and that selects a distortion compensation coefficient that is stored in the storage unit according to a value obtained by the exponentiating; a distortion-compensation processing unit that acquires the selected distortion compensation coefficient from the storage unit, and that performs distortion compensation processing on the input signal to the distortion-compensation-coefficient selecting unit using the acquired distortion compensation coefficient; an amplifier that amplifies the signal subjected to the distortion compensation processing; and a distortion-compensation-coefficient updating unit that updates the distortion compensation coefficient stored in the storage unit based on the amplified signal and the input signal to the distortion-compensation-coefficient selecting unit. |
地址 |
Kawasaki-shi JP |