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:
Sep. 15, 1992
Filed:
Apr. 10, 1990
Applicant:
Inventors:
Kenneth G Buttle, Orangevale, CA (US);
Hiroshi Takatori, Sacramento, CA (US);
Assignee:
Level One Communications, Inc., Folsom, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
370 321 ; 379411 ;
Abstract
A method and apparatus for echo cancelling linear and nonlinear echo components from a received signal by temporally and spatially separating the overall echo canceller into a fast, transversal filter based linear echo canceller which quickly cancels the linear echoes and a slow, look-up table based nonlinear echo canceller which cancels the nonlinear echo components.