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LDPC(Low-density-parity-check，低密度奇偶校验)码是一类具有稀疏校验矩阵的线性分组码，不仅有逼近Shannon限的良好性能，而且译码复杂度较低，结构灵活，是近年信道编码领域的研究热点(LDPC (Low-density-parity-check, low-density parity check) codes are a class of sparse check matrix of linear block codes, is not only good performance approaching Shannon limit, and the decoding complexity low, flexible structure , the field of channel coding in recent years the research focus)

An calculator base on Matlab code

i found this one on math work site hope it is helpful

计算亚波长光栅衍射效率,PBS,即偏振光分离(calculate subwave grating diffraction efficiency)

OFDM信道估计MATLAB仿真程序，包含高斯信道和瑞利莱斯衰落信道，算法包括LS,MMSE,LMMSE,ALMMSE等(OFDM channel estimation MATLAB simulation program, including the Gaussian channel Rice and Rayleigh fading channel, algorithms include LS, MMSE, LMMSE, ALMMSE etc.)

图论研究中的图着色问题的matlab程序，非常好用啊！(Study of Graph Theory Graph Coloring Problem of matlab program, very easy to use ah!)

cohere(x,y,M) computes the coherence function using successive DFTs of length with a Hanning window and 50 overlap. (The window and overlap can be controlled via additional optional arguments.) We see a coherence peak at frequency cycles/sample, as expected, but there are also two rather large coherence samples on either side of the main peak. These are expected as well, since the true cross-spectrum for this case is a critically sampled Hanning window transform. (A window transform is critically sampled whenever the window length equals the DFT length.)

Multivariate curve resolution

用matlab设计的四种fir滤波器，低通、高通、带通、带阻等四种滤波器(Matlab design four kinds of fir filter, low-pass, high-pass, band-pass, rejection and so on four kind of filter.)

基于MATLAB的GPS软件接收机捕获与跟踪算法实现(MATLAB-based software GPS receiver acquisition and tracking algorithm)