LFM信号及回波的生成，时域及频谱分析，模糊度函数分析，时频分析，匹配滤波器能量检测、循环相关检测、及fmusic参数估计-LFM signal and the echo generation, time domain and spectral analysis, ambiguity function analysis, time-frequency analysis, the matched filter energy detection, loop correlation detection

HHT就是先将信号进行经验模态分解（EMD分解），然后将分解后的每个IMF分量进行Hilbert变换，得到信号的时频属性的一种时频分析方法。-HHT is a first signal to carry on the empirical mode decomposition (EMD decomposition), and then decomposed each IMF component of the Hilbert transform, get signal time-frequency

计算地震数据的频谱分布图，用于地震数据处理中的频率滤波和时频分析(calculate the spectral distribution of seismic data, and it can be used for frequency filtering and time-frequency analysis in seismic data processing)