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. 12, 2013
Filed:
Feb. 01, 2010
Applicants:
Greg Tomezak, Buffalo Grove, IL (US);
Mark Fimoff, Hoffman Estates, IL (US);
Inventors:
Greg Tomezak, Buffalo Grove, IL (US);
Mark Fimoff, Hoffman Estates, IL (US);
Assignee:
Intersil Americas Inc., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 5/12 (2006.01); H04L 23/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Systems and methods for determining an unknown QPSK or QAM constellation from a set of possible received constellations are described. One method utilizes a histogram of the power of the signal after inter-symbol-interference has been minimized with a modified constant modulus algorithm equalizer. The constellation may be determined before carrier frequency and phase has been fully recovered. An unknown QPSK or QAM constellation may be identified before or after equalization using disclosed methods for analyzing an output power histogram.