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:
Apr. 25, 2006
Filed:
Aug. 14, 2002
Seiichi Noda, Tokyo, JP;
Seiichi Noda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A QAM modulation system capable of setting a number of multilevel to approximate 2(p is an integer equal to or more than 3) or 2. An input data signal of 4p+1 bits are converted into four signals of p+1 bits, there being a predetermined relationship between the input data signal and the converted signals. The converted four signals are assigned to four phase planes, respectively. The four signals are time-division multiplexed and multilevel-modulated. Thereby, it becomes possible to set the number of multilevel to approximate 2.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile