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. 14, 2002
Filed:
Dec. 22, 1999
Applicant:
Inventors:
Satoru Shimizu, Tokyo, JP;
Eiichiro Kawakami, Tokyo, JP;
Atsuhiko Sugitani, Tokyo, JP;
Kiyohito Tokuda, Tokyo, JP;
Assignee:
Oki Electric Industry CO, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 2/720 ;
U.S. Cl.
CPC ...
H04L 2/720 ;
Abstract
The signal transmission equipment is comprised such that a signal point does not cross the origin of the constellation by selecting signals to be input to the QPSK modulator, and the positions of the signal points in the constellation.