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. 27, 2001
Filed:
Dec. 18, 1996
Applicant:
Inventors:
Juing Fang, Cergy Pontoise, FR;
Pierre Roux, Argenteuil, FR;
Jean-François Houplain, St Germain en Laye, FR;
Assignee:
Alcatel Telspace, Nanterre Cedex, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 7/02 ;
U.S. Cl.
CPC ...
H04L 7/02 ;
Abstract
The invention provides a block-encoded modulation scheme using multi-level partitioning techniques. This scheme is made transparent to phase ambiguities of ±&pgr;/2 and of &pgr;, by means of differential encoding and appropriate mapping, it is applicable to 16-QAM modulation, and it has theoretical encoding gain that is optimal for the rate of the code. The decoder associated with this scheme uses the Wagner algorithm which is much less complicated to implement than the Viterbi algorithm or than the Reed-Solomon algorithm.