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:
Oct. 18, 1983
Filed:
Sep. 09, 1981
Applicant:
Inventor:
Otakar A Horna, Bethesda, MD (US);
Assignee:
Communication Satellite Corporation, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375102 ; 1791706 ; 364164 ; 375106 ;
Abstract
In a digital echo canceller using an impulse response filter, an interpolating and synchronizing circuit is used to couple the received digital signals from the four-wire circuit to the input of the filter. The interpolation and synchronization circuit generates signals having values between the values of received digital samples, and these interpolated valves are then sampled at the send signal rate and supplied to the impulse response filter.