Title:
高速かつ正確な適応制御方法及びシステム
Document Type and Number:
Japanese Patent JP5584969
Kind Code:
B2
Abstract:
In accordance with a particular embodiment of the present invention, a method is offered that includes providing a low-pass filter in an adaptive filter architecture employing a fast steepest descent method. The method further includes decomposing an error signal, injecting a small change to one or more weight parameters for a linear combiner, measuring changes in an error correlation vector, and calculating one or more gradients, wherein the gradients are processed by the low-pass filter. In more particular embodiments, one or more of the gradients are processed by the low-pass-filter in order to remove measurement noise and improve accuracy. In addition, a real gradient of the error correlation vector is monitored such that adaptations can be made due to non-linearity and non-constant characteristics of a channel. The low-pass filter may be replaced with a Kalman Filter for faster convergence.
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Inventors:
Yasuo Hidaka
Application Number:
JP2008248645A
Publication Date:
September 10, 2014
Filing Date:
September 26, 2008
Export Citation:
Assignee:
FUJITSU, LTD.
International Classes:
H03H21/00; H04B3/06
Attorney, Agent or Firm:
Tadahiko Ito