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为了解决正交频分复用(OFDM)中由频率偏移和D opp ler扩展带来的载波间干扰问题,结合T urbo信道编码软输入软输出信息,提出一种用于载波间干扰抵消的匹配迭代算法。该算法利用信道译码输出软信息来当作信息比特的先验信息,从而根据子载波间干扰矩阵来消除对其他载波点上的干扰分量,经过若干次迭代来达到性能优化。与传统的子载波干扰自消除、频域抽头滤波算法以及简单的匹配算法比较,其结果可以消除误码平台;与整体频域均衡算法比较,可以在避免求大型矩阵逆的复杂算法上获得更好的性能优势。
In order to solve the problem of inter-carrier interference (Orthogonal Frequency Division Multiplexing) caused by frequency offset and Doppler spread in Orthogonal Frequency Division Multiplexing (OFDM), combined with soft-input soft-output information of T urbo channel coding, Matching iteration algorithm. The algorithm uses channel decoding to output soft information as a prior information of information bits, so as to eliminate interference components to other carrier points according to the inter-subcarrier interference matrix. After several iterations, performance optimization is achieved. Compared with traditional self-elimination of sub-carrier interference, frequency-domain tap filter and simple matching algorithm, the result can eliminate the error-code platform. Compared with the whole frequency-domain equalization algorithm, Good performance advantage.