Cognitive-radio

说明：  强非线性的曲线函数逼近，采用MATLAB径向基神经网络(rbf ann fitness)

这里用模糊函数对Barke进行分析，研究其时间和频率的 分辨率。(barker )

1 录入一段语音，对其进行时域频域处理，通过变频、变速达到变声目的，且使处理后的语音信号不影响正常收听与理解。 2 用图形用户界面（GUI）对上述变声前变声后进行时域频域图形输出，不同的频率、速度有不同的输出，且对前后波形进行比较 (1 entry a voice, the frequency domain and time domain by frequency conversion variable speed, processing to make the treatment and voice purpose, after the speech signal shall not affect the normal to listen to and understand. 2 with the graphical user interface (GUI) voice of the above voice before after the frequency domain in the time domain graphics output, different frequency, speed have different output, and compared before and after waveform )

哈明窗设计带通滤波器 低阻带边缘：0.3*pi ； 高阻带边缘：0.6*pi AS＝50dB； 低通带边缘：0.4*pi RP＝0.5dB； 高通带边缘：0.5*pi (hamming window design a bandpass filter)

说明：  一维光子晶体传输矩阵法，matlab显示带隙图像。(One-dimensional photonic crystal transfer matrix method, matlab display images bandgap.)

在matlab中对图像块操作！！！！！！！！！！(Operation in matlab image block! ! ! ! ! ! ! ! ! !)

关于模糊逻辑工具箱的具体应用，案例有源码，有详细的操作步骤，对初学MATLAB又想急于上手的尤其有参考价值！(About fuzzy logic toolbox of specific applications, case there is source, has detailed the steps, eager for the beginner-to-use MATLAB in particular want to have reference value!)

MATLAB下通过多种小波实验了解小波变换的原理教程及示例代码(MATLAB wavelet through a variety of experiments to understand the principle of wavelet transform tutorials and sample code)

Dynamic time warping (DTW), cepstral coefficients, decisions

1.同时对多个光谱数据进行一阶导数计算，并保存在元胞数组中。2.对光谱数据进行取均值，每三个列为一组。(At the same time, the first derivative of multi-spectral data is calculated and stored in the cell array.The spectral data are averaged and divided into three groups.)