Code_Dispersion_1D

algorithm for near and far fields

用matlab写的经验模式分解程序。可作希尔伯特-黄变换，画时频图。(Empirical mode decomposition process Written by matlab .It Can be used for Hilbert- Huang Transform and time-frequency analysis.)

捷联式惯性导航的传递对准，使用matlab语言编写(Transfer alignment of inertial navigation)

DSP_Matlab（附例程）超星电子书+MATLAB例程(DSP_Matlab (attached routine) Superstar book+ MATLAB routine)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

objective-c textfield 下拉菜单实现(objective-c textfield drop-down menu to achieve)

explain the coding and decoding of FEC

该m文件是数字信号处理实验课上的实验4：离散傅里叶变换(The m-file is an experimental four experimental course on digital signal processing: the Discrete Fourier Transform)

说明：  分别为AWGN信道模型下BPSK调制的程序；AWGN信道模型下BPSK调制LDPC编码的程序；AWGN信道模型下BPSK调制、采用具有不同列重的构造矩阵进行LDPC编码的程序；AWGN信道模型下BPSK调制、采用不同的迭代译码次数进行LDPC编码的程序。(LDPC coding program for AWGN channel)

该代码实现了“大津法”，也就是最大类间方差算法，完全由本人自己编写，结果很好。(The code of the " Otsu method" , which is the Otsu algorithm, written entirely by my own, good results.)