orbit-satellite-navigation

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.)

ofdm signal to noise ratio

Synthetic Aperture Radar Imaging Simulated in MATLAB

数值计算中机器精度的确定算法 MATLAB源程序 自带注释(machine precision)

双谱法时延估计算法，经过仿真验证效果很好(Dual spectroscopy delay estimation algorithm through simulation works well)

pcm编码，pcm编码pcm编码pcm编码pcm编码pcm编码pcm编码(pcm coding, pcm encoder pcm encoder pcm encoder pcm encoder pcm encoder pcm encoder)

用三种不同的方法（MS/MMSE/ML）估计cp同步的位置(Using three different methods (MS/MMSE/ML) estimate the location of sync cp)

These are Gath Geva and Gustafon Kassel source codes in matlab as implementation of clustering algorithm in Fuzzy approach.

说明：  matlab里面使用三倍中误差法消除观测粗差，去除噪声。(matlab error method which uses three times in the elimination of Gross Errors, remove noise.)

The travelling salesman problem (TSP) or travelling salesperson problem asks the following question: Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city exactly once and returns to the origin city? It is an NP-hard problem in combinatorial optimization, important in operations research and theoretical computer science.