Distortion compensation circuit, and transmission device using distortion compensation circuit and high-frequency power amplifier
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United States of America Patent
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Jan 20, 2015
Issued Date -
N/A
app pub date -
Mar 12, 2012
filing date -
Oct 13, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to shorten the convergence time for compensating distortion generated by a high-frequency power amplifier, a distortion compensation circuit which independently generates coefficients of odd-symmetrical amplitude distortion compensation signals and coefficients of odd-symmetrical phase distortion compensation signals of respective orders of a high-frequency power amplifier includes an even-symmetrical distortion compensation signal generation circuit for generating an even-symmetrical amplitude distortion compensation signal and an even-symmetrical phase distortion compensation signal from a difference between the input signal amplitude and a signal obtained by delaying the input signal amplitude and a difference between the input signal and a signal obtained by delaying the input signal, respectively independently and independently of the odd-symmetrical distortion compensation signals, and an even-symmetrical distortion compensation signal superposition circuit for superposing the even-symmetrical distortion compensation signals on the input signal, and conducts pre-compensation on odd-symmetrical distortion and even-symmetrical distortion independently.
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Patent Citation Ranking
- 3 Citation Count
- H04L Class
- 7.42 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 20, 2026 |
