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:
Aug. 27, 1985
Filed:
Feb. 25, 1982
Applicant:
Inventors:
Gordon R Lang, Bolton, CA;
George D Forney, Jr, Mansfield, MA (US);
Shahid Qureshi, Mansfield, MA (US);
Fred M Longstaff, Islington, CA;
Chi H Lee, Willowdale, CA;
Assignee:
ESE Limited, Rexdale, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03C / ;
U.S. Cl.
CPC ...
375 39 ; 375 42 ; 375 43 ; 329135 ; 332 17 ;
Abstract
Locations of a desired number of signal points for a double side band-quadrature carrier modulation system occupy the inner intersections of a multiplicity of concentric rings with a triangular grid. The signal point locations of the desired number on the outer partially occupied ring are provided with additional signal points at positions selected to provide that the centroid of the set of locations is at the center of the rings.