Systems and methods for providing an envelope tracking supply voltage
US-11923806-B2 · Mar 5, 2024 · US
Predistortion apparatus for power amplifier
US8964893B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8964893-B2 |
| Application number | US-201313874414-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2013 |
| Priority date | Jun 28, 2012 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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A predistortion apparatus, includes a reducer to output a signal that a peak to average power ratio of an input signal is reduced by clipping, a first predistorter to generate and output a first predistortion signal from the output signal of the reducer, based on a signal obtained by removing a clipping noise caused by the clipping from the output signal of the reducer, so as to reduce energy of a residual error component obtained by removing a clipping noise caused by the clipping from an error signal included in an output of the power amplifier, a second predistorter to generate and output, by using the clipping noise, a second predistortion signal to remove a clipping noise component from the first predistortion signal, and a combiner to generate an input signal of the power amplifier obtained by combining the first predistortion signal and the second predistortion signal.
First claim
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What is claimed is: 1. A predistortion apparatus for a power amplifier, comprising: a reducer to output a signal that a peak to average power ratio of an input signal is reduced by clipping; a first predistorter to generate and output a first predistortion signal from the output signal of the reducer, based on a signal obtained by subtracting a clipping noise signal, which is obtained by subtracting the output signal of the reducer from the input signal of the reducer, from the…
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Classifications
- H03F1/3241Primary
Electricity · mapped topic
- H03F1/3247Primary
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8964893B2 cover?
- A predistortion apparatus, includes a reducer to output a signal that a peak to average power ratio of an input signal is reduced by clipping, a first predistorter to generate and output a first predistortion signal from the output signal of the reducer, based on a signal obtained by removing a clipping noise caused by the clipping from the output signal of the reducer, so as to reduce energy o…
- Who is the assignee on this patent?
- Fujitsu Ltd
- What technology area does this patent fall under?
- Primary CPC classification H03F1/3241. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).