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:
Apr. 20, 2010
Filed:
Mar. 09, 2005
Naganori Shirakata, Osaka, JP;
Yasuo Harada, Maidenhead, GB;
Koichiro Tanaka, Hyogo, JP;
Tomohiro Kimura, Osaka, JP;
Shuya Hosokawa, Osaka, JP;
Yoshio Urabe, Nara, JP;
Naganori Shirakata, Osaka, JP;
Yasuo Harada, Maidenhead, GB;
Koichiro Tanaka, Hyogo, JP;
Tomohiro Kimura, Osaka, JP;
Shuya Hosokawa, Osaka, JP;
Yoshio Urabe, Nara, JP;
Panasonic Corporation, Osaksa, JP;
Abstract
In a transfer apparatus to which MIMO-OFDM is applied, a data transmission method and a data reception method are provided in which, even when there are frequency errors varying among transfer paths, the precision of estimation of an inverse propagation coefficient function can be improved, thereby making it possible to suppress a degradation in characteristics. Among symbols composed of a plurality of subcarriers orthognal to each other, the transfer apparatus uses, as a synchronization symbol, a symbol in which predetermined amplitudes and phases are assigned to a plurality of subcarriers spaced at predetermined frequency intervals. The synchronization symbol is divided into transmission antennas to generate a plurality of synchronization subsymbols, which are in turn simultaneously transmitted from a plurality of transmission antennas. A reception apparatus estimates a frequency error for each transfer path based on synchronization subsymbols included in signals received by a plurality of reception antennas, and based on the estimated frequency errors, corrects the received signals.