Patent ID: 8787472

Claim:
A computer implemented method for estimating at least one offset of a communication in a multicarrier communication system, the method comprising: receiving a plurality of subcarriers wherein at least one of the plurality of subcarriers contain a subcarrier that is subject to the distortion and wherein at least one of the subcarriers subject to the distortion includes a direct current (DC) subcarrier which is not empty; generating a plurality of first channel estimates for a plurality of received subcarriers that are not subject to the distortion; processing a number of the plurality of first channel estimates for the 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 by: 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 subtracting the first value from the received known reference signal to produce the estimated offset.