Patent ID: 8311137

Claim:
A system comprising: a receiver to receive an orthogonal frequency division multiplexed signal, the orthogonal frequency division multiplexed signal having been transmitted over a plurality of subcarrier frequencies; a high pass DC component filter to reduce a DC component of the orthogonal frequency division multiplexed signal by shaping noise in the orthogonal frequency division multiplexed signal, wherein the shaping of the noise in the orthogonal frequency division multiplexed signal results in a non-uniform power spectral density of the noise across the plurality of subcarrier frequencies, wherein the high pass DC component filter includes a plurality of subfilters, wherein a sum of filter coefficients of the plurality of subfilters is equal to zero, and wherein a filter length of the plurality of subfilters does not increase an effective channel delay beyond an orthogonal frequency division multiplexing cyclic prefix interval; and a noise whitener to normalize the non-uniform power spectral density of the noise across the plurality of subcarrier frequencies.