选择三个不同频段的信号对其进行频谱分析，根据信号的频谱特征设计三个不同的数字滤波器，将三路信号合成一路信号，分析合成信号的时域和频域特点，然后将合成信号分别通过设计好的三个数字滤波器，分离出原来的三路信号，分析得到的三路信号的时域波形和频谱，与原始信号进行比较，说明频分复用的特点。-Choice of three different signal-band spectral analysis carried out, according to the characteristics of the

语音信号的谱分析的用户界面设计，可以对语音信号做频谱，语谱，倒谱分析-Spectral analysis of speech signals the user interface design, you can do voice signal spectrum, language spectrum, cepstrum analysis

基于声卡采集信号与输出信号，包含了很多种频谱信号分析、信号处理函数-Based on sound data collection and output signals, including a variety of spectral signal analysis, signal processing functions

《Matlab辅助现代工程数字信号处理》书籍的源码，8，9，10章为非平稳信号分析与处理；线性预测与自适应滤波；随机信号的高阶谱分析。-The source of 《Matlab secondary modern engineering digital signal processing》,chapter 8,9,10 non-stationary signal analysis and processing linear prediction and adaptive filtering