CONTROL DEVICE AND CONTROL METHOD

Title:

CONTROL DEVICE AND CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2004/040693

Kind Code:

A1

Abstract:

A control device and a control method capable of high−speed controlling the impedance of a plurality of elements output signal in order to preferably maintain output signal of a non−linear system. The control device comprises first and second changing means for changing each impedance of a plurality of first and second elements affecting characteristics of the output signal within a predetermined range, a calculating means for calculating an evaluation function value depending on the impedance of the plurality of first and second elements according to the output signal, and a gradient calculating means for calculating a gradient vector based on the difference of the evaluation function value before and after the impedance of change of the second element. The evaluation function value is controlled so as to be a desired value by changing each impedance of the plurality of first elements according to the gradient vector.

Inventors:

TODA TAKESHI (JP)
TAKANO TAKESHI (JP)
NAKAYA YUUTA (JP)
OISHI YASUYUKI (JP)

Application Number:

PCT/JP2002/011460

Publication Date:

May 13, 2004

Filing Date:

November 01, 2002

Export Citation:

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Assignee:

FUJITSU LTD (JP)
TODA TAKESHI (JP)
TAKANO TAKESHI (JP)
NAKAYA YUUTA (JP)
OISHI YASUYUKI (JP)

International Classes:

H01Q3/26; H01Q3/36; H01Q9/04; H03L1/00; (IPC1-7): H01Q3/36

Foreign References:

JP2002118414A	2002-04-19
JP2000100659A	2000-04-07

Other References: