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LDPC码既低密度奇偶校验码（Low Density Parity Check Code，LDPC），它由Robert G.Gallager博士于1963年提出的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，目前已广泛应用于深空通信、光纤通信、卫星数字视频和音频广播等领域。LDPC码已成为第四代通信系统(4G) (LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder.)

TSP 问题模拟退火算法的matlab示例(TSP simulated annealing algorithm matlab example)

用来实现二维离散傅里叶变换的简单实用程序，在matlab中能快速得到理想结果(To realise 2-D Discrete wavelets transform，easily and effective to reach the ideal result we want！)

uniform quantizer , a quantizer for calcualting the quantized values of the output

doarima.m MATLAB script to do an ARIMA(p,d,q) analysis where d is set but P and q can be vectors of values you want to try. It produces AIC and FPE (final prediction error) values for comparing models. The AIC is different than the one computed by S+, but they both minimize on the same model for the arma22.dat simulated data.

BP神经网络等多种算法预测高铁站客运量，程序下载可直接运行。(BP neural network and other algorithms predict high-speed rail station passenger volume, program downloading can be directly run.)

基于主成分分解的波束形成，对于学习波束形成非常有帮助。(a good example for studying PCI beamforming.)

利用方波调制和调制，可以设置不同的占空比以及幅值(Using a square wave modulation and modulation, can set different duty cycles and the amplitude)

能量谱分析计算,可以得到很精确的幅值、频率、相位估计，双向PCS控制仿真。( Energy spectrum analysis and calculation, You can get a very accurate amplitude, frequency, phase estimation, Two-way PCS control simulation.)

电力电子技术基础基于MATLAB反激变换器仿真电路图。(The power electronic technology base is based on the simulation circuit diagram of the MATLAB flyback converter.)