SNR

四元数c++软件类库，四元数基本运算，非常好用(Quaternion c++ Software library, quaternion basic computing, very easy to use)

在小波域中，以图像作为水印信息，嵌入以声音为载体信号的源程序。(n wavelet domain to image as a watermark, embedded with sound as the carrier signal source program. )

基于MATLAB的PCA和KPCA的实现，有图，有返回的参数，绝对可以运行！(Based on the PCA and KPCA MATLAB to achieve, there are plans to return to the parameters, the absolute can run!)

说明：  MUSIC算法 DOA（Direction Of Arrival）波达方向定位技术主要有ARMA谱分析、最大似然法、熵谱分析法和特征分解法，特征分解法主要有MUSIC算法、ESPRIT算法WSF算法等。 MUSIC (Multiple Signal Classification)算法，即多信号分类算法，由Schmidt等人于1979年提出。MUSIC算法是一种基于子空间分解的算法，它利用信号子空间和噪声子空间的正交性，构建空间谱函数，通过谱峰搜索，估计信号的参数。对于声源定位来说，需要估计信号的DOA。MUSIC算法对DOA的估计有很高的分辨率，且对麦克风阵列的形状没有特殊要求，因此应用十分广泛。(DOA (direction of arrival) positioning technology mainly includes spectrum analysis, maximum likelihood method, entropy spectrum analysis method and feature decomposition method. The feature decomposition method mainly includes music algorithm, ESPRIT algorithm, algorithm, etc. Music (multiple signal classification) algorithm, namely multi signal classification algorithm, was proposed by Schmidt In 1979. MUSIC algorithm is an algorithm based on subspace decomposition. It uses the orthogonality of signal subspace and noise subspace to construct spatial spectrum function, and estimates signal parameters through spectrum peak search. For sound source localization, DOA of signal needs to be estimated. MUSIC algorithm has high resolution for DOA estimation, and has no special requirements for the shape of microphone array, so it is widely used.)

说明：  LDPC 预编码，用于构造Raptor码(LDPC Precodes, Used to construct Raptor codes )

三次样条插值函数边界条件由实际问题对三次样条插值在端点的状态要求给出。以第1边界条件为例，用节点处二阶导数表示三次样条插值函数，用追赶法求解相关方程组。(Cubic spline interpolation function from the real problems of boundary conditions cubic spline interpolation is required to give the state of the endpoint. In the first boundary condition, for example, with a node represents the second derivative of the cubic spline interpolation function, solving equations associated with the catch method.)

LMS和RLS自适应算法性能比较(The comparation of LMS and RLS in adapinve signal processing)

现代信号处理中的分数阶傅里叶变换（FRFT）的MATLAB代码，对分析信号比较有用(Fractional Fourier Transform（FRFT）code in matlab for study modern signal processing.)

TOTAL GENERALIZED VARIATION FOR IMAGE DENOISING.

《matlab应用大全》赵海滨编著，清华大学出版社，第四章主讲字符串分析(The application of matlab Zhao Haibin compiled, tsinghua university press, the fourth chapter analysis on strings)