Decision Feedback-based Intercarrier Interference Cancellation Method in OFDM Communication System
正交频分复用系统中的判决反馈干扰消除方法*

Aiming at the drawbacks of larger estimation errors for Hadamard Inter-Carrier Interference(ICI) matrix estimation method,an decision feedback-based ICI cancellation method was proposed for Orthogonal Frequency Division Multiplexing(OFDM) communication systems.The ICI matrices for OFDM communication system could be diagonalized by Discrete Fourier Transform(DFT) matrices,and the output of DFT after decision could be used to estimate the ICI matrix.Using following decision symbols,ICI matrices could be updated instantly to trace the instantaneous changes of mobile recipient channels.Joined with Bit-Interleaved Coded Modulation(BICM),the method with comparison to Hadamard ICI estimation method can strengthen the resistibility of OFDM systems to ICI and this also is verified by simulation experiments.