Patent ID: 7680197

Claim:
An apparatus for sampling timing compensation at a receiver of a communication system, wherein each of a first and a second symbol signals comprises two pilot signals transmitted via a first and a second pilot subchannels respectively, and the first and the second pilot subchannels comprise a first and a second pilot indexes respectively, the apparatus comprising: a pilot subchannel estimator for generating first frequency responses of two of the pilot signals transmitted over the first pilot subchannel and generating second frequency responses of the other two of the pilot signals transmitted over the second pilot subchannel; a timing offset estimator, coupled to the pilot subchannel estimator, for calculating a timing offset according to a first difference between the first frequency responses of the first and second symbol signals, a second difference between the second frequency responses of the first and second symbol signals and a subtraction between the first and second differences; and a phase rotator, coupled to the timing offset estimator, for performing sampling timing compensation according to a phase rotation corresponding to the timing offset.