功率谱估计

经典的功率谱估计是将数据工作区外的未知数据假设为零，相当于数据加窗。经典功率谱估计方法分为：相关函数法、周期图法以及改进的周期图估计法即平均周期法和平滑周期图法；

1相关函数法

2周期图法

3平均周期图法和平滑平均周期图法-Power spectrum estimation is the classical power spectrum estimation of work zone data assumed to be zero outside the known data, the equivalent of data windowing. Classical power spectrum estimation method is divided into: correlation function, periodogram and periodogram estimation improved with an average cycle method and the smooth periodogram　a correlation function 2 periodogram 3 Average periodogram and periodogram smoothing average Law