source_matlab

说明：  MATLAB给图像添加各种噪声，非常好用，希望对大家有用(MATLAB add all kinds of noise to the image, very easy to use, we hope to be useful)

LT编码的东西，不知道好不好 就是上传试试(this is lt)

关于图像滤波的一个实例应用，教会你如何通过傅里叶变换滤除单频噪声(An example of image filtering applications, teach you how to filter out single-frequency noise in Fourier transform)

在工程应用中经常需画剖面图，改程序能帮助你迅速画出剖面图(In engineering applications often need to draw profile, change program can help you quickly draw profiles)

谱估计的welch算法、周期相关图谱估计算法(Welch spectral estimation algorithm, cycle-related pattern estimation)

The comparation of 2 numbers, set by the user

说明：  针对非线性系统状态估计滤波，有很好的植入性，希望可以帮助到你。(Nonlinear system filtering)

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

一道matlab例题，适合初学者学习，内容仅供参考，如有更好的方法请推荐。(A matlab example, suitable for beginners to learn, is only for reference, if you recommend a better way.)

不同信噪比对MUSIC算法实现波达方向估计的影响(Different signal to noise ratio of MUSIC DOA estimation algorithm for implementation of the impact of)