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:
Mar. 04, 2014
Filed:
Jan. 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 removing a band-limited distributed pilot signal from an orthogonal frequency division multiplexed (OFDM) signal involves converting a received OFDM signal, which includes a distributed pilot signal and an OFDM data signal, into a frequency domain signal having populated frequency bins containing respective subcarrier signals, each including a constituent data signal of the OFDM data signal and component pilot signal of the distributed pilot signal. An average magnitude of the populated frequency bins is determined based on the absolute values of the complex components of the populated frequency bins of the frequency domain signal, and the average magnitude of the populated frequency bins is used to estimate a pilot signal magnitude. The distributed pilot signal is removed from the frequency domain signal using a stored replica of the pilot signal scaled in conjunction with the pilot signal magnitude to yield the OFDM data signal.