ADAPTIVE TRANSFER FUNCTION ESTIMATING METHOD AND ESTIMATING DEVICE USING THE SAME - Nippon Telegraph and Telephone Corporation

Title:

ADAPTIVE TRANSFER FUNCTION ESTIMATING METHOD AND ESTIMATING DEVICE USING THE SAME

Document Type and Number:

Japanese Patent JP3303898

Kind Code:

B2

Abstract:

PURPOSE: To attain the reduction of an arithmetic amt. by calculating a pre-filter coefficient vector with specific regression equations with respect to the pre-filter coefficient vector.
CONSTITUTION: The estimated transfer function correcting vector δHΛ(k) of a pseudo system is calculated and an error signal e(k) is made almost zero by repeating the correction of the estimated transfer function vector HΛ(k) of the pseudo system by using the estimated transfer function correcting vector δHΛ(k) and a predetermined correction step size (μ). Then, in such a case, the pre-filter coefficient vector H(k) is calculated with the regression equations with respect to the pre-filter coefficient vector composed of equations 1 and 2 by calculating the forward linear prediction coefficient vector F(k) of an input signal x(k) and its square prediction error summation f(k) and the backward linear prediction coefficient vector B(k) of the signal x(k) and its square prediction error summation b(k).

Inventors:

Masafumi Tanaka
Yutaka Kaneda
Youichi Haneda
Junji Kojima
Shoji Makino

Application Number:

JP17541794A

Publication Date:

July 22, 2002

Filing Date:

July 27, 1994

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G01H3/00; G06F17/12; G10K11/178; H03H21/00; H04B3/04; H04B3/23; (IPC1-7): G10K11/178; G01H3/00; G06F17/12; H03H21/00

Attorney, Agent or Firm:

Suguru Kusano

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