cryptography

DS-CDMA仿真源程序，内附详细说明文档，适合初学者(DS-CDMA simulation source code, containing detailed documentation, suitable for beginners)

一款基于matlab环境开发的系统辨识工具箱。主要涉及频域辨识算法，除了常规的辨识方法之外，还包括状态空间辨识。内有pdf的使用说明。(A matlab toolbox for system identification in frequency domain.)

power_seriesbranch,功率电子领域matlab仿真文件，已经验证过，程序运行正常( power_seriesbranch,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

说明：  针对调幅信号求包络波的问题，给出求调幅信号的包络程序(Demand for AM signal envelope wave problem, given the program seek AM signal envelope)

多项式拟合代码，内有图形,希望对学习者有用(Polynomial fitting code, there are graphic )

说明：  ％code2_1 for lecture 1 Simpson s rule ( Code2_1 for lecture 1 Simpson s rule)

Linear Matrix Inequalities in System and Control Theory

功率谱估计 信号为两个正弦信号加高斯白噪声，各正弦信号的信噪比均为10dB，长度为N，信号频率分别为 和 ，初始相位 ，取 ， 取不同数值：0.3，0.25。 为采样频率。分别用Levinson递推法和Burg法进行功率谱估计，并分析改变数据长度、模型阶数对谱估计结果的影响。(Power spectrum estimation signal into two sinusoidal signals applied Gaussian white noise, the SNR of each sinusoidal signal are 10dB, a length of N, respectively, and the signal frequency, initial phase, take, take different values: 0.3,0.25. Is the sampling frequency. Levinson recursive method were used and Burg method for power spectrum estimation, and change the length of the data analysis, the impact on the estimation model order spectrum.)

不同版本的频率选择性信道matlab仿真,同时附有word版原理说明(Different versions of frequency-selective channel matlab simulation, at the same time with a word version of the principle that)

用于图像分块，将图像分为大小一致的图像，便于图像像素位置的确定(For the image block, the image into an image of the same size, easy to determine the location of the image pixel)