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:
Mar. 26, 2002
Filed:
Dec. 23, 1994
Applicant:
Inventors:
Masahiro Ohki, Tokyo, JP;
Yukitsuna Furuya, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K 1/00 ; H04L 2/722 ;
U.S. Cl.
CPC ...
H04K 1/00 ; H04L 2/722 ;
Abstract
In a transmission side, a k-bit parallel signal is divided into n signals, which are respectively encoded and then phase-shifted so as to causing a mutual phase difference of &pgr;/2 . Spectrum spreading is performed on the phase-shifted encoded signals which are combined together to produce a transmission digital signal. In a receiving side, reverse spreading is performed on a receiving signal to produce reverse-spread signals, which are given the phase difference to cancel the phase shift of the transmission side, and then decoded. Thus, the original k-bit parallel signal is reproduced in the receiving side.