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. 07, 2007
Filed:
Feb. 12, 2003
Kiyoshi Kawamoto, Yokohama, JP;
Manabu Kawabe, Hachioji, JP;
Shiro Mazawa, Yokohama, JP;
Tomoyuki Ono, Yokohama, JP;
Kiyoshi Kawamoto, Yokohama, JP;
Manabu Kawabe, Hachioji, JP;
Shiro Mazawa, Yokohama, JP;
Tomoyuki Ono, Yokohama, JP;
Hitachi Communication Technologies, Ltd., Tokyo, JP;
Abstract
A radio receiver handles a transmitted Walsh sequence having a code length of 'm' as a two-dimensional array of 'a' rows and “b” columns, and performs a fast Hadamard transform process having a code length of “a” in the row direction. The absolute values of the results are added in the column direction, and a Walsh number having the maximum receiving power is selected to determine a Walsh sequence having a code length of “a.” Then, only the identified column is extracted, and a fast Hadamard transform process having a code length of “b” is applied in the column direction.