产生典型的几种信号波形，如方波，三角波，白噪声等。-A typical signal waveforms generated several, such as square, triangle, white noise.

生成正弦信号生成三角波信号一维小波分解重构第1-7层逼近系数-Sinusoidal signal is generated triangular wave signal is generated one-dimensional wavelet reconstruction of the first level approximation coefficient of 1-7