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1·Secondly, a SLM method based on the DFT property of the time domain circular convolution is studied.

然后重点分析了基于DFT的时域循环卷积性质的选择映射（SLM）方法，提出了一种基于SLM的改进方法。

2·The circular convolution operator is compared with the linear convolution operator in the calculation of local statistics.

比较了循环卷积算予和线性卷积算子在计算局部统计量上的异同点。

3·According to the principle of circular convolution, a method of realizing non-causal equalizer is proposed to suppress the influence of the group delay effect.

其中针对群延迟的影响，根据循环卷积的原理，提出了一种实现非因果均衡器的方法。

4·Though the conventional symmetric extension and circular convolution are applied, the experiments show that the border distortion still exists in the reconstructed signal.

传统方法一般用圆卷积和对称扩展方法来减弱边界扩展效应，但实验结果表明边界还存在失真。

5·In this paper, algorithms for computing 2-d circular convolution by using Fast Polynomial Transform (FPT) are reviewed and discussed, and then an improved algorithm is presented.

本文研究利用快速多项式变换(FPT)计算二维循环卷积的几种算法，改进了其中的一种算法，编制了相应的计算机程序。

6·A new algorithm of deconvolution via window convolution operation is proposed, and the algorithm can solve the ill-posed problem occurring in deconvolution via circular convolution.

本文提出了一种用窗口卷积实现反卷积的新算法，这种算法解决了用圆周卷积计算反卷积时出现的病态问题。