Patent ID: 8320477

Claim:
An inter-carrier interference (ICI) cancellation method of a k th sub-carrier of an orthogonal frequency division multiplexing (OFDM) receiving signal (k is a natural number greater than 1 and smaller than or equal to n, n is a number of sub-carriers), comprising: canceling an inter-carrier interference element, produced by at least one sub-carrier, among inter-carrier interference elements of the k th sub-carrier by a decision feedback equalization (DFE) method; and canceling another inter-carrier interference element, produced by at least one second sub-carrier, among inter-carrier elements of the k th sub-carrier by a linear minimum mean square error equalization (LMMSE) method comprising canceling inter-carrier interference elements produced by the kth sub-carrier to a (k±L)th sub-carrier (wherein L is a natural number more than or equal to 1 and less than n/2).