Title:
METHOD AND DEVICE FOR THE LINEARIZATION OF A HIGH-FREQUENCY HIGH-CAPACITY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO2001052405
Kind Code:
A3
Abstract:
The invention relates to a method for the linearization of a high-frequency high-capacity amplifier by means of adaptive digital predistortion of the input signals of the amplifier (5) by determining correctional values that are approximated from DESIRED sender signals detected at the amplifier input and ACTUAL sender signals detected at the amplifier output. To this end, I/Q data continuously derived from the DESIRED sender signals at the digital base band modulator (1) and I/Q data derived by a measuring unit (4) at the amplifier output from the ACTUAL sender signals are fed to a neuronal network for evaluation and for the calculation of correctional values. The correctional values produced are returned to the digital base band modulator (1) and the data flow flowing from the digital base band modulator (1) to the amplifier input is predistorted with the correctional values produced in the neuronal network. The device for carrying out the method for the linearization of a high-frequency high-capacity amplifier by means of adaptive digital predistortion comprises a digital base band modulator (1) that is mounted upstream of a D/A converter (8), a HF modulator (9) and the HF high-capacity amplifier (5). A measuring device (4) is linked with the neuronal network at the output of the HF amplifier (5) via a data link (6) so as to detect the I/Q data and the digital base band modulator (1) is linked with the neuronal network via an I/Q data link (3). A correctional data line (7) links the neuronal network (2) with the digital base band modulator (1).
Inventors:
BALL CARSTEN (DE)
BUHE GERRIT (DE)
BUHE GERRIT (DE)
Application Number:
PCT/DE2001/000050
Publication Date:
March 28, 2002
Filing Date:
January 09, 2001
Export Citation:
Assignee:
SIEMENS AG (DE)
BALL CARSTEN (DE)
BUHE GERRIT (DE)
BALL CARSTEN (DE)
BUHE GERRIT (DE)
International Classes:
H03F1/32; H03F1/34; H03F3/24; H04B1/04; (IPC1-7): H03F1/32
Other References:
BENVENUTO ET AL: "A neural network approach to data predistortion with memory in digital radio systems", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC). GENEVA, MAY 23 - 26, 1993, NEW YORK, IEEE, US, vol. 3, 23 May 1993 (1993-05-23), pages 232 - 236, XP010136900, ISBN: 0-7803-0950-2
BENVENUTO N ET AL: "GENERALISED BACKPROPAGATION ALGORITHM FOR TRAINING A DATA PREDISTORTER WITH MEMORY IN RADIO SYSTEMS", METAL FINISHING, ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, US, vol. 94, no. 9, 26 September 1996 (1996-09-26), pages 1925 - 1926, XP000637913, ISSN: 0026-0576
BENVENUTO N ET AL: "GENERALISED BACKPROPAGATION ALGORITHM FOR TRAINING A DATA PREDISTORTER WITH MEMORY IN RADIO SYSTEMS", METAL FINISHING, ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, US, vol. 94, no. 9, 26 September 1996 (1996-09-26), pages 1925 - 1926, XP000637913, ISSN: 0026-0576
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