在高速移動環境下,正交分頻多工系統的效能受限於載波間干擾,且隨著移動速度上升,載波間干擾的現象愈嚴重。為了克服高速移動環境下引起的載波間干擾,本論文提出基於最大近似法則的演算法改進載波間干擾減抑。本論文以DVB-T系統為例,最後在FPGA上實現本論文提出的演算法。In high-mobility environment, the performance of wireless OFDM communication systems is limited by inter-carrier-interference (ICI) phenomenon and ICI effect is more serious with higher velocity of receiver. To overcome ICI which is caused by the high mobility, in this thesis we present an improved ICI mitigation scheme based on maximum-likelihood criterion. We take DVB-T system for example and finally implement the algorithm we propose with FPGA.