Patent ID: 8743946

Claim:
A communication receiver, comprising: a time domain receive filter to provide a filtered output, the filtered output including colored noise; and a frequency domain, fractionally-spaced equalizer (FSE) unit to receive the filtered output from the receive filter, the FSE unit determines a separate weighting factor for each subcarrier, the weighting factor is determined based on a noise variance of the subcarrier, wherein for a portion of a passband, the FSE equalizes a subcarrier as: s ^ k = h k *  h k  2 + σ k 2 E s ⁢ y k where h k a frequency response on subcarrier k of a composite channel including a transmit filter, a communication channel and the receive filter, σ k 2 is the noise variance for subcarrier k, E s is the average energy of a transmit symbol, y k is a received frequency-domain signal on subcarrier k and ŝ k is the equalized signal on subcarrier k.