A new equalization method for OFDM system

It is well known that the column vectors of FFT transform matrix are uniform phase vectors of unit circle and the components of a column represent the different phases of the vector, which is called the cyclic property of the column vectors. In this paper, we use the cyclic property of the column vectors to formulate the equalization matrix. To make the method work with fewer known OFDM symbols, over-sampling samples are employed. Simulation results demonstrate that the proposed method is effective in the equalization and the suppression of co-channel interference signals at each sub-carrier.