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:
Jun. 12, 2007
Filed:
Apr. 02, 2003
Seiichi Noda, Tokyo, JP;
Seiichi Noda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a QAM modulation system, (3p+1) or (3p+2) input signal strings, where p is an integer not less than 3 or 2, are converted into three (p+1) string signals which are then allocated to three phase planes. The converted three (p+1) string signals are time-division multiplexed and multi-level modulated to realize QAM modulation in which the n-ary number may be set to approximately 2or 2. In a QAM modulation system, (4p+3) input signal strings, where p is an integer not less than 3, are converted into three (p+1) string signals, which are then allocated to three phase planes, time-division multiplexed and multi-level modulated to realize QAM modulation in which the n-ary number may be set to approximately 2.