For integer frequency offset estimation, we analyze a sequence auto-correlation based algorithm, and extend the algorithm into frequency selective channel case.

对于整数频偏估计，分析了一种基于序列自相关的算法，并将该算法推广应用到频率选择性信道中；

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At the same time, the channel estimation error, caused by the spectral leakage of DFT, can be reduced by canceling the auto-correlation error of the time-domain sequence of frequency-domain pilots.

同时，通过消除频域导频时域序列的自相关误差，能有效降低由DFT谱泄漏导致的信道估计误差。

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By the analysis of the corresponding theory, an image sequence auto-sorting algorithm based on phase correlation and its optimized algorithm are given.

对相应的理论进行分析，给出了基于相位相关法的图像排序算法以及它的优化算法。

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