基-4 FFT的MATLAB代码

说明：  粒子群优化算法，由粒子群算法实现目标函数的最优解(PSO, particle swarm algorithm from the optimal solution of objective function)

给定某一技术指标，按照以上技术指标设计巴特沃斯低通滤波器。(Given a technical indicator, technical indicators in accordance with the above design Butterworth low-pass filter.)

这个kalman滤波器是由maltlab的m文件构成，可直接运行(kalman toolbox)

利用DCT域进行扩频水印的嵌入,含实验图像，和各种经典的攻击方式。可选择嵌入强度和攻击强度。利用Matlab编写(DCT domain using spread-spectrum watermark embedding, with the experimental images, and various classical attacks. The option embedded in the strength and intensity of attacks. Prepared using Matlab)

对非平稳信号进行时频分析，分析结果比小波变换结果要好(Non-stationary signal in time-frequency analysis and the results are better than the wavelet transform results)

漆包线规格表，可以用测电阻来计算线圈长度。(Enameled wire specification sheet can be used to calculate the loop length measuring resistor.)

.m file for matlab called compare

语音信号的线性预测（LPC）方程的自相关解法及其matlab实现。(Speech signal linear prediction (LPC) the autocorrelation Solution of the equation matlab.)

分步傅里叶算法求解GNLSE,包含线性吸收，二阶三阶色散，克尔效应，高阶非线性效应(The split step Fourier algorithm for solving GNLSE)

说明：  全变分去噪程序，用于图像去噪，该方法能克服图像去噪中的震荡效应，使图像更加光滑，并能保存边缘信息。(total variation denoisy)