ruanjianrenyuanxinjin

调制识别是非协作通信中的关键技术之一，在电子对抗、软件无线电等领域 应用十分广泛。该过程介于信号检测与解调之间，由于对传输信号没有过多的先 验信息以及在接收端有很多未知的参数，例如：信号功率，载波频率和相位偏移， 时间信息等，导致对调制方式的盲识别是一项很困难的任务。此外，实际中存在 多径衰落、频率选择性和时变信道等问题，使得这项任务变得更具有挑战性。 (The modulation recognition is one of the key technologies of the non-cooperative communication, such as electronic countermeasures and software defination radio, therefore it is such a significant discipline and orientation in the research of communication field. Obviously, without enough knowledge in transmitter and verified parameters about receivers, for example signal power, carrier frequency and phase offsets and so force, it is hard to get the modulation of blind identification. What is more, for the sake of the multipath fading, frequency-selective and time-varying channels in the real scenarios the task is even harder. )

说明：  车辆动力特性的计算matlab程序，利用matlab实现计算车辆动力特性(The vehicle dynamic characteristics calculation matlab program,using MATLAB to realize the calculation of vehicle dynamic characteristics )

EFG code lagrange for elastic materials

this is the matlab prog

说明：  用matlab的simulink做的对选择式分集进行的测试 及性能验证。(Using matlab to do the simulink of Selective sub-set of testing and performance validation.)

滤波求和方式实现宽带波束形成，基于分段非线性权重值的Pso算法，这个有中文注释，看得明白，通过matlab代码，非归零型差分相位调制信号建模与仿真分析 ，matlab程序运行时导入数据文件作为输入参数，使用拉亚普诺夫指数的公式，抑制载波型差分相位调制。( Filtering summation way broadband beamforming, Based on piecewise nonlinear weight value Pso algorithm, The Chinese have a comment, understand it, By matlab code, NRZ type differential phase modulation signal modeling and simulation analysis, Import data files as input parameters matlab program is running, Raya Punuo Fu index using the formula, Suppressed carrier type differential phase modulation.)

对于一阶系统辨识，分别采用LMS、RLS、仿射投影算法来估计参数(For a first-order system identification, respectively, using LMS, RLS, affine projection algorithm to estimate the parameters)

说明：  此算法为最小二乘参数估计的递推算法。运行后得到辨识参数：a1= -1.4981, a2= 0.7038, b1= 1.0476, b2= 0.4704。(The algorithm for the recursive least squares parameter estimation algorithm. After operation to identify the parameters: a1 =-1.4981, a2 = 0.7038, b1 = 1.0476, b2 = 0.4704.)

傅里叶变换能将满足一定条件的某个函数表示成三角函数(正弦和/或余弦函数)或者它们的积分的线性组合(Fourier transform to meet certain conditions can be expressed as a function of trigonometric functions (sine and/or cosine functions) or their linear combination of the integral)

this code is finite diffrence method