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:
May. 02, 2017
Filed:
Jun. 03, 2016
Applicant:
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Inventor:
Gerald R. Fischer, Luray, VA (US);
Assignee:
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 (2006.01); H04L 25/49 (2006.01); H04L 7/033 (2006.01); H04L 7/10 (2006.01); H03K 9/04 (2006.01); H04L 7/04 (2006.01);
U.S. Cl.
CPC ...
H04L 7/0016 (2013.01); H04L 7/0079 (2013.01); H03K 9/04 (2013.01); H04L 7/0331 (2013.01); H04L 7/0334 (2013.01); H04L 7/046 (2013.01); H04L 7/10 (2013.01); H04L 25/4902 (2013.01);
Abstract
A symbol clock recovery circuit for recovering a symbol clock in an M-ary pulse position modulation (PPM) signal. The recovery circuit includes a largest magnitude comparison circuit that selects a largest magnitude signal value from a group of M signal values aligned with a hypothesis symbol boundary location and the average of that largest magnitude value is compared with a threshold, or with results from other boundary location hypotheses, or with both, to determine the true position of the symbol boundary.