Patent ID: 8059773
Filing Date: 2011-11-15
Classification: H04L

Abstract:
1. An apparatus comprising: a first transform unit, responsive to a communications signal of a channel, to generate a first output signal in a frequency domain; a first estimation unit, responsive to the first output signal in the frequency domain, to determine a first channel response of the channel based on one or more pilot signals of the communications signal; a first equalization unit, responsive to the first output signal in the frequency domain, and responsive to the first determined channel response, to generate a first equalized signal; a first decision block, responsive to the first equalized signal; an inverse transform unit, responsive to an output signal of the first decision block, to generate an output signal in a time domain; a second estimation unit, responsive to the output signal in the time domain, to determine a second channel response of the channel; a second transform unit, responsive to the second determined channel response, to generate a second output signal in the frequency domain; a second equalization unit, responsive to the first output signal in the frequency domain, responsive to the second output signal in the frequency domain, and responsive to the output signal of the first decision block, to generate a second equalized signal; and a second decision block, responsive to the second equalized signal, to generate a decision signal.