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. 25, 2007
Filed:
Mar. 26, 2004
Toyokazu Hori, Kodaira, JP;
Hiroshi Nogami, Fujisawa, JP;
Toshihito Habuka, Tamamura, JP;
Naoto Inokawa, Takasaki, JP;
Kazuyuki Takada, Kawaguchi, JP;
Toyokazu Hori, Kodaira, JP;
Hiroshi Nogami, Fujisawa, JP;
Toshihito Habuka, Tamamura, JP;
Naoto Inokawa, Takasaki, JP;
Kazuyuki Takada, Kawaguchi, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
The invention comprises: processing for receiving an OFDM packet having a preamble and the following data transmission symbol, in which packet the subcarrier interval of the preamble is set wider than that of the data transmission symbol; processing for estimating a DC offset occurring at a receiving side by using the received preamble; processing for correcting the DC offset on the received data transmission symbol, according to the estimation result of the DC offset; and processing for demodulating the DC offset corrected data transmission symbol. Thus, it is possible to estimate a DC offset and then correct the DC offset according to the estimated value, in the OFDM packet with no nul symbol defined there.