Wireless communication unit and method for channel estimation

A multicarrier wireless communication system comprising:

• a computer memory for storing instructions;
• and
• a processor for executing the instructions, the instructions for:
• estimating at least one offset in a subcarrier that is subject to distortion in a multicarrier communication system;
• receiving a plurality of subcarriers wherein the plurality of subcarriers includes the subcarrier that is subject to the distortion wherein the plurality of subcarriers subject to distortion includes a direct current (DC) subcarrier which is not empty;
• generating a plurality of first channel estimates for a respective plurality of received subcarriers that are not subject to the distortion;
• 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 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.