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:
Mar. 31, 2015
Filed:
Oct. 23, 2012
Applicant:
Dragonwave, Inc., Kanata, CA;
Inventors:
Assignee:
Dragonwave, Inc., Kanata, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/36 (2006.01); H04L 27/04 (2006.01); H03C 5/00 (2006.01);
U.S. Cl.
CPC ...
H04L 27/04 (2013.01); H03C 5/00 (2013.01);
Abstract
Octagonal non-rectangular Quadrature Amplitude Modulation (QAM) is disclosed. Grid points from a uniform rectangular grid, which includes points that have equal horizontal and vertical spacing, are selected to form a non-rectangular octagonal grid that approximates an octagonal shape. QAM symbols are mapped to respective grid points in the non-rectangular octagonal grid to form a non-rectangular octagonal QAM constellation that also approximates the octagonal shape. Input signals can then be modulated using the non-rectangular octagonal QAM constellation.