正弦波的LP建模 能显示原正弦波波形及它的频谱图，LP模型的频谱图，LP模型的极点图，LP模型的脉冲响应图。-This demonstration illustrates the modelling of a sinewave with an LP model The displays show the sinewave,it spectrum, the spectrum of the LP model,the poles of the LP model and the impuse r