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:
Nov. 11, 2008
Filed:
Dec. 07, 2004
Ryosuke Mori, Mino, JP;
Ryosuke Mori, Mino, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An OFDM modulation apparatus receives a signal composed of OFDM symbols each of which is composed of an effective symbol and a guard interval, generates K delayed signals by delaying the received signal by K effective symbol periods, generates a signal by adding up all the K delayed signals, generates a first correlation signal that shows a correlation between the received signal and the addition-result signal, generates K×L second correlation signals from the first correlation signal, based on K×L combinations of K effective symbol periods and L fractions used to indicate the guard interval period, detects one among the K×L second correlation signals that indicates a largest correlation level, and detect periods of the effective symbol and the guard interval of the received signal in accordance with the detected second correlation signal.