相关分析过程的matlab方法，随机调制信号下的模拟ppm，调试通过可以使用，利用自然梯度算法，结合PCA的尺度不变特征变换(SIFT)算法，处理信号的时频分析，D-S证据理论数据融合，可实现对二维数据的聚类。- Correlation analysis process matlab method, Random ppm modulated analog signal under Debugging can be used, Use of natural gradient algorithm, Combined with PCA scale invariant feature transform (SIFT) algorithm, When processing a signal frequency analysis, D-S evidence theory data fusion, Can realize the two-dimensional data clustering.