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:
Jun. 21, 1994
Filed:
Mar. 27, 1992
Khaled Fazel, Epinay/Orge, FR;
Antoine Chouly, Paris, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A multistage decoder for decoding received symbols formed by symbols which have been subjected to multilevel coding in several successive partitioning levels from a constellation into several subsets. A symbol of the constellation is coded into several bits, and each stage of the multistage decoder determines a sequence of bits relative to a partitioning level for a sequence of estimated symbols which are selected from among the symbols of the constellation or of the subset as being each individually closest to the received symbols. The invention is characterized in that for at least one stage at least one detector generates an erasure bit for the estimated symbols whenever a received symbol lies in a predetermined erasure zone, whereupon the stage decoder then corrects the erasure bits. The decoder may operate in the adaptive or non-adaptive mode. The erasure zones may be angular sectors or bands of constant width. The widths of the zones are stored in preprogrammed memories.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile