一个适合于学习信号处理的小程序，包含频谱分析，采集，保持等-A learning signal processing for small programs, including spectral analysis, acquisition, keeping, etc.

Is the basis of the signal processing, Calculating a target and ocean echo power spectral density, Ensure accurate communication is learning a good helper.

Based on multi-document image obtained combining technique, Machine learning routines, Calculating a target and ocean echo power spectral density.