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. 15, 2009
Filed:
Aug. 13, 2002
Applicants:
Ghazi Al-rawi, Stanford, CA (US);
Ahmad R. S. Bahai, Lafayette, CA (US);
Tareq Al-nafouri, Stanford, CA (US);
John Cioffi, Atherton, CA (US);
Inventors:
Ghazi Al-Rawi, Stanford, CA (US);
Ahmad R. S. Bahai, Lafayette, CA (US);
Tareq Al-Nafouri, Stanford, CA (US);
John Cioffi, Atherton, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for demodulating a coded orthogonal frequency division multiplexing (OFDM) signal in a coded OFDM receiver. The coded OFDM signal comprises systematic bits, error control bits, and a cyclic prefix. The apparatus performs channel estimation quickly and accurately using the error control bits, the channel spread constraint, and the cyclic prefix portion of the received coded OFDM signal.