numerical_methods_using_matlab

详细讲述了直接序列扩频差分锁相环的文章，包含具体的算法结构，并附有仿真结果。(A novel differentially coherent delay-locked loop(DCDLL) for accurate code tracking is proposed for direct sequence spread spectrum systems. Due to the use of the differential decoder and exactly one correlator, the proposed scheme avoids the problems of gain imbalance. The tracking error variance is derived by linear analysis. When the proposed DCDLL scheme is applied in ranging with additive white Gaussian noise (AWGN) channel, the performance of the proposed DCDLL scheme is about 1.4 dB better than that of one-correlator tau–dither loop (TDL), and near that of noncoherent DLL.)

完美的OFDM仿真，可以应用于多种环境下的数据链路，并含有多种结果仿真(OFDM perfect simulation, can be applied to a variety of data link environment and contains a variety of simulation results)

2013年“高社杯”数学建模b题，对于纵向切割的图片复原。 使用方法：打开matlab，调整工作目录为解压后的文件夹，在matlab工作框中输入Problem1即可(2013 " High Society Cup" Mathematical modeling b title picture for longitudinal cutting recovery. How to use: open matlab, adjust working directory is unpacked folder work in matlab can enter Problem1)

one quadrant pwm converter(matlab)

经典小波包分解，并计算各频带能量，能量比等参数(wavelet package decomposition and energy of frequency band)

这个是matlab下时频分布处理的全部代码。(under Matlab is the time-frequency distribution of all the code.)

最小二乘支持向量机代码，最小二乘支持向量机很好地解决了普通支持向量机耗时的问题，很适合用于及时诊断故障(fuzzy least square vector machine)

对采集来的时间信号实现eemd分解，求得若干个本征模函数分量。(Collected on time signal eemd decomposition, obtained a number of intrinsic mode function components )

基于SVM的混沌时间序列分析 把SVM优化算法用于混沌时间序列分析 可以得到优于一些方法的结果(SVM-based chaotic time series analysis of the SVM optimization algorithm for chaotic time series analysis methods can be superior to the results of)

说明：  水印的嵌入与提取检测定义常量水印的嵌入与提取检测定义常量 (catface imgfile nlength ntimes)