经典的功率谱和 双谱估计，很好，看看能用上的。-Classic power spectrum and dual spectrum estimation, well, look at can be used on.

估计功率谱的经典方法，即周期图和修正周期图法-Estimate the power spectrum of the classic method, ie, the period map and corrected periodogram

经典谱估计，平均功率法，周期图法，bt算法，代码清晰明了，还配有注释-Classical spectrum estimation, the average power method, periodogram, bt algorithm code clarity, comes with comments