In broadband OFDM systems, the Doppler effect caused by high-speed movement leads to inter-carrier interference (ICI). Based on the full use of the ICI distribution characteristics, this paper uses partial channel information to derive two new low-complexity MMSE and DFE equalization algorithms. Analysis and simulation show that the new algorithm can flexibly and controllably achieve an effective trade-off between receiver performance and complexity. Under the condition of approximately the same computational overhead, the proposed DFE equalization scheme effectively eliminates the \"error floor\" of the traditional receiver\'s error performance, thereby achieving performance improvement.
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