64QAM_baseband-system-transmitter

这是用于通信系统中MIMO干扰对齐的算法，此算法通过对齐多小区干扰，提高通信系统的性能。(This is used in the MIMO communication system of interference alignment algorithm that by aligning the multi-cell interference and improve performance of the communication system.)

说明：  （1）应用9×9的窗口对上述图象进行随机抽样，共抽样200块子图象； （2）将所有子图象按列相接变成一个81维的行向量； （3）对所有200个行向量进行KL变换，求出其对应的协方差矩阵的特征向量和特征值，按降序排列特征值以及所对应的特征向量； （4）选择前40个最大特征值所对应的特征向量作为主元，将原图象块向这40个特征向量上投影，所获得的投影系数就是这个子块的特征向量。 （5）求出所有子块的特征向量。 ((1) the application of 9 × 9 window of these images at random, a total sample of 200 sub-image (2) all sub-images according to out-phase into a 81-dimensional row vector (3) all 200 lines for KL transform vector, derived its corresponding covariance matrix of eigenvectors and eigenvalues, in descending order by eigenvalue and the corresponding eigenvector (4) a choice to 40 corresponding to the largest eigenvalue eigenvector as the PCA, the original image block to the 40 feature vectors on the projection, the projection coefficients obtained by this sub-block eigenvector. (5) calculated for all sub-block eigenvector.)

Calculates satellite coordinates

这是EM560模块的AT命令规范，很值得学习的(This is the EM560 module AT command specification, it is worth learning)

说明：  这是在网上下的一个东东，很有用的，现在拿来和大家共享,是《参数估计和逆问题》的matlab程序(This is the Internet under a Dongdong, very useful, and we used to share, "parameter estimates and the inverse problem" Matlab procedures)

基于matlab的多道地震信号合成，涉及雷克子波与反射系数，还有地震信号的加噪与去噪(Multichannel seismic signal synthesis based on matlab involves Rayleigh wavelet and reflection coefficient, as well as noise addition and denoising of seismic signal.)

相移光纤光栅长度变化仿真,matlab,(matlab simulink FBG.)

Cooperative spectrum sensing in cognitive radio networks A survey

1、使用牛顿法求sqrt（2）； 2、用牛顿法求 fx=(x-1)*(exp(x-1)-1)的误差以及误差比； 3、用牛顿法及其他两种方法求 fx=x^4-4*x+x^2的重根 (1, using Newton' s method for the sqrt (2) 2, using Newton' s method for the fx = (x-1)* (exp (x-1)-1) error and error ratio 3, using Newton' s method and the other two method, to calculate fx = x ^ 4-4* x+ x ^ 2 re-root)

演示一维有限元方法程序。并附有L2误差收敛阶数随着网格变细的误差图形(Presentation of one-dimensional finite element method program. Together with L2 error convergence order fining error with grid graphics)