通过设置图形的属性节点，活动曲线以及曲线是否可见来实现用复选框控制对应曲线波形的有无，非常实用！-Set graphics attribute nodes activity curve, and the curve is visible to realize the presence or absence of the corresponding curve waveform check box control, very useful!

正交频分复用，最小均方误差信道估计算法。-Orthogonal frequency division multiplexing, minimum mean square error channel estimation algorithm.