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:
Feb. 07, 1989
Filed:
Jun. 27, 1985
Applicant:
Inventors:
Assignee:
Alcatel N.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36472419 ; 379411 ;
Abstract
An echo canceller, using an Adaptive Finite Input Response Filter (AFIR), uses a processing device with a plurality of interconnected cells. These cells, connected in a systolic arrangement, determines the function of three variables m, n, and p, in the equation p+m n, where m and n are data inputs to each of the cells, and p is the output of a previous calculation cell. This is achieved by using a timing sequence, in which the variable m is applied bit serial to the cells over a period of q time slots, and the variable n is applied in parallel over the cells in one time slot.