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ID3算法的matlab实现，包含了分类中的所有子函数代码。(ID3 algorithm matlab implementation, including the classification of all the subfunctions code.)

这是一个costas实现的QPSK解调器，这个解调器可以实现一个QPSK调制信号的解调！(it is about a demodulator for QPSK！)

说明：  本程序仿真了电子扫描阵列天线方向图，实现了不同参数情况下栅瓣现象、主瓣宽度和功率增益随扫描角变化情况(This program simulates the electronic scanning array antenna pattern, and realizes the change of grating lobe phenomenon, main lobe width and power gain with scanning angle under different parameters.)

多GPS天线姿态确定程序，包括文件读取、单点定位、双差定位、坐标转换以及姿态确定等。(a MATLAB toolbox for determining the attitude of a rigid platform by means of multiple non-dedicated antennas using global positioning system is presented. The programs embedded in this toolbox cover the RINEX data analysis, single point positioning, differential positioning, coordinate conversion, attitude determination, and other auxiliary functions.)

卫星干扰源定位方面的算法程序，包括三星及四星定位(Algorithm process of satellite interference location , including three-star and the four-star position)

说明：  求解双层规划问题常用的算法有极点算法、直接搜索法、下降法和非数值优化方法(如模拟退火算法、遗传算法等)，遗传算法的求解思路是：首先对上层的决策变量编码，代人下层规划模型，通过求解下层模型的决策变量值，代入上层模型计算适应度值，然后进行交叉、变异、选择操作，最后求出最优解。(Solving Bilevel Programming Problems with pole algorithm commonly used algorithms, direct search method, descent and non-numerical optimization methods (such as simulated annealing, genetic algorithms, etc.), genetic algorithm for solving approaches: the first on the top of the decision variable coding, on behalf of the were lower programming model, by solving the lower model of decision variables values into the upper model on behalf of the fitness value, and then crossover and mutation, select Options, and finally get the best solution.)

ofdm系统模型,包含信道估计 FFT变换 QPSK 16QAM调制 插入导频等,非常全面,(The ofdm system model, including channel estimation, FFT transform, QPSK 16QAM modulation, insertion pilot, etc., is very comprehensive.)

gps卫星位置计算的程序，精确确定卫星的位置(gps satellite position calculation procedures to accurately determine the position of satellites)

说明：  极限学习机ELM对特征值进行分类并对分类结果画图，属于有监督学习，可运行(Extreme Learning Machine ELM classifies eigenvalues and draws classification results. It belongs to supervised learning and can be operated.)

运通GPS第二版 服务器源代码，完整版 结构清晰(yun tong gps SERVER 2ND)