应用于高速测量仪器的自适应波形重构算法

Adaptive Wave Reconstruction Algorithm for High Speed Measuring Instrument

当传统数字内插算法应用于高速数字信号波形重构时，在某些输入信号（如方波）下会产生严重的失真。本文首先推导了数字内插的原理与模型，分析了正弦内插算法造成波形失真的原因，然后提出一种适用于高速数字存储示波器的新的数字内插算法。计算机仿真结果与系统实验表明，这种算法能有效地修正传统插值方法在波形重构中造成的信号畸变。

Traditional digital interpolation is widely used in many fields, but it brings obvious distortion when being used for wave-reconstructing of high speed digital signal, especially for certain input signals like square waves. In this paper, the authors first analyze the digital interpolation＇s mathematical theories and models of uniform sampling signal, and reasons why sine interpolation algorithm brings the wave distortion. And then, the authors propose a new digital interpolation algorithm which is especially applicable to high speed Digital Storage Oscilloscope （DSO）. The simulation results with computer and experiments of the system prove that the algorithm can effectively correct the signal aberration which is caused by conventional interpolation method in wave-reconstructlng.