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:
Sep. 16, 2014
Filed:
Jul. 31, 2012
Terrance W. Charbonneau, Fort Wayne, IN (US);
John P. Johnston, Fort Wayne, IN (US);
Bruce E. Reidenbach, Albion, IN (US);
Gregory T. Barnett, Fort Wayne, IN (US);
Terrance W. Charbonneau, Fort Wayne, IN (US);
John P. Johnston, Fort Wayne, IN (US);
Bruce E. Reidenbach, Albion, IN (US);
Gregory T. Barnett, Fort Wayne, IN (US);
Exelis Inc., McLean, VA (US);
Abstract
A technique for equalizing a distributed pilot OFDM signal with decision feedback involves correlating a received OFDM signal against a pilot reference to obtain a coarse channel estimate, where the received OFDM signal includes a distributed pilot signal and an OFDM data signal. The received OFDM signal is equalized based on the coarse channel estimate and the distributed pilot signal is removed to generate a coarse data signal estimate. The coarse data signal estimate is removed from the received OFDM signal using the coarse channel estimate to generate a residual pilot signal. The residual pilot signal can then be correlated against the pilot reference to obtain a fine channel estimate. The received OFDM signal is equalized based on the fine channel estimate, and the distributed pilot signal is removed to produce a fine data signal estimate from which data is recoverable.