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通信信号数字调制识别源程序，包含六种常见的调制方式(Digital modulation recognition of communication signal source, contains six kinds of common modulation)

对双音信号的LUT基带数字预失真，功放采用saleh模型，附有各文件的组成说明。适合于深入学习功放线性化技术。该仿真对宽带和窄带都做了仿真，对窄带的效果更好，仍然有改进的余地。(This is a simulation program of Matlab for LUT digital baseband predistortion. It is helpful in learning High power amplifier linearity technology. Both of the narrowband and wideband situation is under simulation. The result shows that this shceme fits narrowband situation better.)

用matlab进行平动点轨道的绘制，halo轨道绘制，三维曲线(Libration point orbit of halo rendering, 3D curve)

本程序主要针对多目标优化问题，采用粒子群优化方法进行多目标优化(This program is mainly aimed at multi-objective optimization problem, using particle swarm optimization method for multi-objective optimization)

给定离散地震动加速度数据a、反应谱控制周期点tp、离散时间间隔dt、阻尼比z，计算地震动加速度反应谱rspa以及最大反应值出现的时刻tMax。(Given the discrete ground-motion acceleration data a, the response spectral controlling period tp, the discrete time distance dt, and the damping ratio z, calculate the ground-motion acceleration response spectrum rspa and the time loction of the occurrence of maximum response.)

Double_buck_PI_Control.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(Double_buck_PI_Control.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

在无约束最优化方法中，通过选择搜索方向 k d 而得到的方法主要有四种：最 速下降法，Newton法，共轭方向法，Quasi-Newton (拟牛顿法)。 (Study on the algorithm of several nonlinear conjugate gradient method and the analysis of global convergence)

这个文件为粒子滤波算法的matlab源代码程序。(Particle filter)

simulation of communication systems and software defined radio from the book chapter 3

使用FR共轭梯度法求解无约束问题 输入包括初始点，目标函数和梯度 输出包括最优点和最优解，还有迭代次数(Use FR conjugate gradient method for solving unconstrained problems including initial entry points, the objective function and the gradient of the output, including the advantages and the most optimal solution, as well as the number of iterations)