Patent ID: 8428167

Claim:
A method of estimating symbols in a digital signal received over a communication channel, the symbols being multiplexed on orthogonal frequency sub-carriers, the method comprising: estimating at least one communication channel parameter from predetermined information contained in the digital signal and for at least one symbol: performing a transform on at least one portion of the received signal that is substantially shorter than a duration of a symbol; performing a transform on a first portion of the received signal to provide a first set of frequency domain parameters, the first portion substantially corresponding to at least part of the symbol; performing the transform on a second portion of the received signal to provide a second set of frequency domain parameters, the second portion substantially corresponding to at least part of the symbol, and the first and second portions being separated by a predetermined time shift; and estimating the symbol from a combination of the first and second sets of frequency domain parameters, and at least one estimated communication channel parameter.