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:
Aug. 12, 2008
Filed:
Mar. 26, 2002
Ken Umeno, Tokyo, JP;
Shenghung Shih, Tokyo, JP;
Akihiro Yamaguchi, Higashi-ku, Fukuoka-shi, Fukuoka 811-0201, JP;
Ken Umeno, Tokyo, JP;
Shenghung Shih, Tokyo, JP;
Akihiro Yamaguchi, Higashi-ku, Fukuoka-shi, Fukuoka 811-0201, JP;
Abstract
A filter () accepts spreading code sequences or the like as input sequences of a chip rate 1/D, the accepted spreading code sequences are sequentially delayed and distributed by delay circuits () connected in series, delay times of individual signals are an arithmetical progression with a chip length D being a common difference D, the individual signals are amplified with spreading codes by amplifiers (), amplification factors for the individual signals are a geometrical progression of a common ratio r, the sum of the amplified signals is obtained by addition in an adder (), and the result is sequentially output as an output sequence.