Patent ID: 8254510

Claim:
An apparatus for inter-carrier interference cancellation, the apparatus comprising: an inter-symbol interference free region detector for detecting a time-domain received signal to obtain information of an inter-symbol interference free region of the time-domain received signal; a multi-step windowing adjuster for obtaining a plurality of cyclic useful symbols from the time-domain received signal according to the information of the inter-symbol interference free region, generating a set of multi-step windowing coefficients, and obtaining a plurality of adjusted cyclic useful symbols by multiplying the cyclic useful symbols by the set of multi-step windowing coefficients, respectively; a time domain combiner for combining the adjusted cyclic useful symbols in a time domain to obtain a time-domain combination signal, wherein inter-carrier interference of each of sub-carriers of the time-domain combination signal is centralized on neighboring D sub-carriers; a fast Fourier transformer for transforming the time-domain combination signal into a frequency-domain received signal; a channel estimator for estimating to obtain a channel response matrix corresponding to the frequency-domain received signal; and an overlapped parallel multi-block successive interference cancellation (SIC) equalization unit for dividing the frequency-domain received signal and the corresponding channel response matrix into a plurality of overlapped signal blocks according to a value of the D, and performing successive inter-carrier interference cancellation on each of the signal blocks in parallel to obtain estimation data.