针对EMD方法的不足,已调制信号计算其普相关密度，用于信号特征提取、信号消噪，调试通过可以使用，快速扩展随机生成树算法，应用小区域方差对比，程序简单。- For lack of EMD, Modulated signals to calculate its density Pu-related, For feature extraction, signal de-noising, Debugging can be used, Rapid expansion of random spanning tree algorithm, Application of small area variance comparison, simple procedures.