Wireless communication unit and method for DC offset estimation
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United States of America Patent
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Oct 15, 2013
Grant Date -
May 5, 2011
app pub date -
Mar 25, 2009
filing date -
Apr 25, 2008
priority date (Note) -
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Abstract
A method (500) for estimating at least one offset in a subcarrier that is subject to distortion in a multicarrier communication system. The method comprises receiving a plurality of subcarriers wherein the plurality of subcarriers contain the subcarrier that is subject to the distortion; and generating a plurality of first channel estimates for a respective plurality of received subcarriers that are not subject to the distortion. The method further comprises processing a number of the plurality of first channel estimates for the respective plurality of received subcarriers that are not subject to the distortion to generate a second channel estimate for the subcarrier that is subject to the distortion; and estimating an offset associated with the subcarrier that is subject to the distortion. Estimation of the offset comprises: receiving a known reference signal transmitted for the subcarrier that is subject to the distortion; multiplying the second channel estimate with the known reference signal to produce a first value; and subcarrier subtracting the first value from the received known reference signal to produce the estimated offset.
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