Patent ID: 8335284

Claim:
An apparatus in a multiple sub-carrier digital communication receiver for reducing inter-channel interference (ICI), the apparatus including: a channel estimation block for calculating channel estimates, the channel estimates being calculated based on one of receive symbols and ICI reduced receive symbols; an interpolation block for calculating interpolated channel estimates, the interpolated channel estimates being calculated based on a set of channel estimates; and an ICI reduction block for calculating ICI reduced receive symbols, the ICI reduced receive symbols being calculated based on a set of interpolated channel estimates and one of the receive symbols and the ICI reduced receive symbols, wherein the ICI reduction block includes: a first equalizer for determining a first transmit symbol estimate based on a first receive symbol and the set of interpolated channel estimates; a channel estimate time derivative block for calculating a channel estimate time derivative based on a difference between a first interpolated channel estimate and a second interpolated channel estimate in the set of interpolated channel estimates; an ICI estimation block for generating an ICI estimate based on the first transmit symbol estimate and the channel estimate time derivative; and a summation device for calculating an ICI reduced receive symbol based on a difference between the first receive symbol and the ICI estimate.