Distortion-compensated amplifier using predistortion technique
First Claim
1. A distortion-compensated amplifier for compensating for distortion, the distortion-compensated amplifier comprising:
- an amplifying section; and
memory effect distortion component compensating means for compensating for a distortion component caused by a memory effect of the amplifying section by using a time difference of results from squaring an input signal and a time difference of results from raising the input signal to any other even power.
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Accused Products
Abstract
A memory effect distortion component compensating unit compensates for a distortion component caused by a memory effect of an amplifier by using a time difference of results from raising an input signal to even power. For example, the amplifier may include a memory effect distortion component compensating unit having an even power raising unit for raising an input signal to even power, an even power raising result delaying unit for delaying a signal of a result of even power raising, an even power raising result time difference detecting unit for detecting a difference between a signal of an even power raising result and a delayed signal, an input signal multiplying unit for multiplying a signal of a detection result by an input signal, a distortion compensation coefficient multiplying unit for multiplying a signal of a multiplication result by a distortion compensation coefficient, and a distortion compensation coefficient multiplication result adding unit for adding an input signal and a signal of a multiplication result.
57 Citations
20 Claims
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1. A distortion-compensated amplifier for compensating for distortion, the distortion-compensated amplifier comprising:
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an amplifying section; and memory effect distortion component compensating means for compensating for a distortion component caused by a memory effect of the amplifying section by using a time difference of results from squaring an input signal and a time difference of results from raising the input signal to any other even power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A base station apparatus comprising a distortion-compensated amplifier for compensating for distortion, the distortion-compensated amplifier including:
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an amplifying section; and memory effect distortion component compensating means for compensating for a distortion component caused by a memory effect of the amplifying section by using a time difference of results from squaring the input signal and a time difference of results from raising the input power to any other even power. - View Dependent Claims (16, 17, 18, 19)
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20. A transmitter comprising a distortion-compensated amplifier for compensating for distortion, the distortion-compensated amplifier including:
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an amplifying section; and memory effect distortion component compensating means for compensating for a distortion component caused by a memory effect of the amplifying by using a time difference of results from squaring the input signal and a time difference of results for raising the input signal to any other even power.
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Specification