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. 19, 2013
Filed:
May. 01, 2009
Yoneo Akita, Tokyo, JP;
Yoneo Akita, Tokyo, JP;
Tektronix, Inc., Beaverton, OR (US);
Abstract
Constellation display allows a user to evaluate the quality of a signal under test with the constellation display even if the signal is a digital modulation signal that has many possible ideal phases. A signal analyzeracquires time domain data of the signal under test that has N ideal phases. The signal analyzerdemodulates the signal under test to measure the phases θm and amplitudes Am of the symbols of the signal. Phase differences dθ between the ideal and measured phases of the measured symbols are calculated. K group phases θgi are assigned to N of the ideal phases. The signal analyzer displays a constellation using phases θgi+dθ and the measured amplitudes Am. That is, points are plotted at locations of X=Am*cos(θgi+dθ)+jAm*sin(θgi+dθ) on a complex plane.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile