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US 2006/0188038 A1Published application
Distortion compensation apparatus
AssigneeFujitsu Limited
InventorsHideharu Shako, Yasuhito Funyu, Takeshi Ohba
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AssigneeFujitsu Limited
InventorsHideharu Shako, Yasuhito Funyu, Takeshi Ohba
Estimating the term…
A distortion compensation apparatus is provided to restrain an increased calculation time caused by a large amount of calculation required for obtaining a phase variation amount for compensation from the correlation. The distortion compensation apparatus includes an update calculation section calculating a distortion compensation coefficient by use of an adaptive algorithm; a distortion compensation section performing distortion compensation to the transmission signal, based on the distortion compensation coefficient being read out from the distortion compensation coefficient storage; a correlation calculation section calculating a real part of correlation and an imaginary part of correlation of each the reference signal and the feedback signal; and a phase rotation section compensating a relative phase deviation between the reference signal and the feedback signal, based on the real part of correlation and the imaginary part of correlation calculated by the correlation calculation section, wherein the update calculation section calculates a distortion compensation coefficient using the post-compensation signal.
A distortion compensation apparatus comprising:
A distortion compensation apparatus updating stored data of distortion compensation coefficients to be applied based on a differential signal between a reference signal and a feedback signal, said distortion compensation apparatus comprising:
Dependencies are inferred from the claim text.