Overlap-and-add with DC-offset correction

Details Overlap-and-add with DC-offset correction Overlap-and-add with DC-offset correction

2006-07-21

2010-06-15

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S316000

Reexamination Certificate

active

07738575

ABSTRACT:
A method and system for estimating DC offset and removing the excess DC offset from samples used by an overlap-and-add operation at the receiver of OFDM symbols in UWB communication. The DC offset for each sample within the overlap-and-add interval may be estimated using a sliding window, of the size required for an FFT, operation over past samples. The DC offset may be estimated for a sample within the overlap-and-add interval and updated for the succeeding samples. A size of the overlap-and-add interval may be fixed or may be allowed to vary according to switching characteristics of an analog RF stage preceding the overlap-and-add operation.

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International Search Report for International Application No. PCT/US2006/028467, International Application filed Jul. 21, 2006, Inventor: Ravishankar H. Mahadevappa, et al. International Search Report completed Jan. 5, 2007 and mailed Feb. 20, 2007 (2 pgs.).
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English language translation of abstract of TW 200400710 (published Jan. 1, 2004).
English language translation of abstract TW 1221715 (published Oct. 1, 2004).
English language translation of abstract TW 1225335 (published Dec. 11, 2004).

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