Title:
DISTORTION COMPENSATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2010/073789
Kind Code:
A1
Abstract:
Disclosed is a distortion compensation circuit that efficiently compensates for distortion. A distortion compensation circuit (20) comprises a sampling memory unit (21), which accumulates an input signal and an output signal from an amplifier (4), a model estimation unit (22), which reads the input and output signals that are accumulated upon the sampling memory unit (21), estimates a model that represents an input/output characteristic of the amplifier (4), and outputs a coefficient that denotes the model thus estimated, and a distortion compensation unit (23), which compensates for a distortion of the amplifier (4), based on the coefficient. The distortion compensation circuit (20) further comprises a control unit (25), which causes the accumulation of the input signal and the output signal upon the sampling memory unit (21) of a predetermined length, and controls the sampling memory unit (21) to accumulate the input and output signals anew in order to obtain a new coefficient after the distortion compensation is carried out by the distortion compensation unit (23) according to the coefficient that is obtained from the input and output signals that have been accumulated upon the memory unit.
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Inventors:
ONISHI MASAHIKO (JP)
ILLARIONOV MIKHAIL (JP)
ILLARIONOV MIKHAIL (JP)
Application Number:
PCT/JP2009/067036
Publication Date:
July 01, 2010
Filing Date:
September 30, 2009
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
ONISHI MASAHIKO (JP)
ILLARIONOV MIKHAIL (JP)
ONISHI MASAHIKO (JP)
ILLARIONOV MIKHAIL (JP)
International Classes:
H03F1/32; H03F3/24
Foreign References:
| JPH0879143A | 1996-03-22 | |||
| JP2007248115A | 2007-09-27 | |||
| JP2002082843A | 2002-03-22 | |||
| JP2002009556A | 2002-01-11 | |||
| JP2008295089A | 2008-12-04 |
Other References:
LEI DING ET AL.: "A robust digital baseband predistorter constructed using memory polynomials", IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 52, no. 1, January 2004 (2004-01-01), pages 159 - 165, XP011106847
LEI DING: "Digital predistortion of power amplifiers for wireless application", March 2004, GEORGIA INSTITUTE OF TECHNOLOGY
LEI DING: "Digital predistortion of power amplifiers for wireless application", March 2004, GEORGIA INSTITUTE OF TECHNOLOGY
Attorney, Agent or Firm:
ONDA, Hironori et al. (JP)
Hironori Onda (JP)
Hironori Onda (JP)
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