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:
Dec. 28, 2004
Filed:
Nov. 16, 2000
Seiichi Sano, Higashiyamato, JP;
Atsushi Miyashita, Tokorozawa, JP;
Yoshikatsu Wagatsuma, Kodaira, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
A data transmission system and method utilizing orthogonal frequency division multiplexing, wherein in a receiver apparatus of the data transmission system, synchronization is obtained by the following steps. A correlation value of a reception signal which was orthogonal frequency division multiplexed and a predetermined sync symbol pattern or a signal obtained by delaying one effective symbol period is arithmetically calculated a predetermined times in a predetermined arithmetic calculation window. The correlation values obtained after a predetermined number of arithmetic calculations from an intermediate of a total number of the arithmetic calculations are reduced so as to not exceed a predetermined value. The maximum value is detected from the correlation values and a reference signal for demodulating the reception signal is formed based on information of a time based position of a signal at the time when the maximum value is obtained.