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:
Dec. 26, 2006
Filed:
Feb. 06, 2006
Patrick D. Smith, Deerfield, IL (US);
Robert G. Uskali, Schaumburg, IL (US);
Patrick D. Smith, Deerfield, IL (US);
Robert G. Uskali, Schaumburg, IL (US);
General Instrument Corporation, Horsham, PA (US);
Abstract
A method and apparatus for automated correlation of digital modulation impairment is described. The technique obtains soft decision data () and extracts signal space location information of sufficient resolution to distinguish different types of impairment to a digitally modulated signal. The technique applies an error vector magnitude mask () and determines the signal-to-noise ratio of the digitally modulated signal. The technique applies impairment masks () and provides a characterization () of impairment affecting the digitally modulated signal (). The technique determines a subset of the soft decision data () that falls within the impairment masks () and calculates correlation weights (). The technique may be used to identify, isolate, and classify different types of impairment. Given sufficient data collection, sources of impairments may be determined precisely.