有限长度采样信号内插的一种有效方法

由于时域截断造成的频谱渗漏现象,有限长度采样信号的内插往往产生严重的失直。本文首先导出了源于经典的 Whittaker重构的一种内插的快速计算,然后引入基线变换将Campbell重构扩展到一般有限长度信号。两者结合产生了一种能够有效地消除截断影响的快速内插算法。分析和实验表明,这种新的方法通常均能给出令人满意的结果。

An Effective Method for Interpolation of Finite Length Sampled Signals

The interpolation of finite length sampled signals often result in savers distortion due to the leakage in spectrum caused by time domain truncation. In this paper a fast interpolation algorithm originated from the classical Whittaker Reconstruction is first derived. And basis transform is then introduced in extending Campbell Reconstruction to general finite length signals. Combining the above two measure presents a fast algorithm that effectively eliminate the defect of truncation. Analysis and tests shows that this new method can usually give satisfactory result.