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. 13, 2010
Filed:
Jun. 11, 2004
Ken Umeno, Tokyo, JP;
Akio Hasegawa, Tokyo, JP;
Minghui Kao, Saitama, JP;
Abstract
A chaos spreading code c(n) is inputted to a spreading unit. Data Dand c(n) are multiplied in the spreading unit. A chaos spreading code d(n) is inputted to a spreading unit. Data Dand d(n) are multiplied in the spreading unit. The chaos spreading codes c(n) and d(n) orthogonally cross each other. Outputs of the spreading unitsandare added by an adderand transmitted through a transmitting unitto a transmission path. By making an initial value which is set in a chaos sequence generator having a construction of a digital circuit different, the chaos spreading codes which orthogonally cross can be formed. Since the chaos spreading codes c(n) and d(n) orthogonally cross, an orthogonal modulating unit having a construction of an analog circuit for amplitude-modulating carriers which orthogonally cross can be made unnecessary and the construction can be simplified.