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:
Feb. 26, 2008
Filed:
Oct. 23, 2003
Hideki Nakahara, Takaraduka, JP;
Koichiro Tanaka, Takaraduka, JP;
Kenichi Mori, Ibaraki, JP;
Yoshio Urabe, Ikoma, JP;
Hitoshi Takai, Toyono-gun, JP;
Hideki Nakahara, Takaraduka, JP;
Koichiro Tanaka, Takaraduka, JP;
Kenichi Mori, Ibaraki, JP;
Yoshio Urabe, Ikoma, JP;
Hitoshi Takai, Toyono-gun, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A detected signalcontains a preamble portion which includes symbol alternations, followed by a unique word portion, and a data portion. Each time a symbol alternation is detected, a correction value calculation sectionaverages the phase shift in the detected signalfor a predetermined length, thereby calculating a correction value. The correction value determination sectionstores a plurality of correction valuesin a chronological order. When the unique word portion is detected, the correction value determination sectionretains, as an effective correction value, a correction value which is arrived at by going back a predetermined number of correction values among the stored correction values. A phase rotation sectioncorrects the phase of the detected signalby using an effective correction valuecalculated by the correction value determination section