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:
Jul. 04, 2000
Filed:
Mar. 03, 1998
Richard G Williams, San Diego, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A frame mapping technique that uses aspects of Minimum Modulus Conversion (MMC) and Shell Mapping (SM) to map data bits to a sequence of data symbols, or points. The apparatus includes a modulus converter acting as a Mixed Base Ring Selector (MBRS) to generate ring indices from K data bits. The MBRS is combined with a signal point selector to generate a sequence of transmitted symbols. The signal point selector may operate on modulus conversion principles, trellis coding principles, or uncoded bit mapping techniques. The apparatus and method permit the use of constellations having any integer number of points per ring, and a varying number of rings from symbol time to symbol time.