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. 22, 1990
Filed:
Dec. 21, 1988
Applicant:
Inventors:
Giovanna D'Aria, Matera, IT;
Giorgio Taricco, Turin, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 17 ; 371 375 ; 375104 ;
Abstract
In the receiver of a multi-level signal transmission system an unreliability signalling is generated for a decided channel symbol whenever the value of the sample originating said symbol lies within value regions comprising each decision threshold. Unreliability signallings relevant to each code symbol are counted and the existence of an erasure is signalled to the decoder when the number of unreliable channel symbols exceeds a predetermined number. The number of erasures in a codeword is also counted and erasure correction is disabled in the decoder when such a number exceeds a predetermined value.