The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2006
Filed:
Oct. 16, 2001
Kiyoshi Nishiyama, Iwate, JP;
Kiyoshi Nishiyama, Iwate, JP;
Abstract
Quick real-time identification and estimation of a time-non-varying or time-varying system. A new Hevaluation criterion is determined, a fast algorithm for a modified Hfilter based on the criterion is developed, and a quick time-varying system identifying method according to the fast Hfiltering algorithm is provided. By the fast Hfiltering 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.