Title:
SYSTEM IDENTIFYING METHOD
Document Type and Number:
WIPO Patent Application WO/2002/035727
Kind Code:
A1
Abstract:
Quick real-time identification and estimation of a time-non-varying or time-varying system. A new H¿$m(w)? evaluation criterion is determined, a fast algorithm for a modified H¿$m(w)? filter based on the criterion is developed, and a quick time-varying system identifying method according to the fast H¿$m(w)? filtering algorithm is provided. By the fast H¿$m(w)? filtering algorithm, a time-varying system sharply varying can be traced with an amount of calculation O(N) per unit time step. The algorithm completely agrees with a fast Kalman filtering algorithm at the extreme of the upper limit value. If the estimate of impulse response is determined, a pseudo-echo is sequentially determined from the estimate and subtracted from the real echo to cancel the echo. Thus an echo chancellor is realized.
Inventors:
NISHIYAMA KIYOSHI (JP)
Application Number:
PCT/JP2001/009082
Publication Date:
May 02, 2002
Filing Date:
October 16, 2001
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
NISHIYAMA KIYOSHI (JP)
NISHIYAMA KIYOSHI (JP)
International Classes:
H03H21/00; G05B13/02; H04B3/23; (IPC1-7): H04B3/23
Foreign References:
| JPS61200713A | 1986-09-05 | |||
| JPH07110693A | 1995-04-25 |
Attorney, Agent or Firm:
Hashizume, Takeshi (Ginza 3-Chome Chuo-ku, Tokyo, JP)
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