Home_Networking_Basis

matlab程序的一些算法，需要的同学可以直接引用(Matlab procedures some algorithm, the needy students can directly apply)

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，测量BPSK的误码率性能，画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线，请解释在误码率为0.01时，两种合并方式所表现的不同的物理意义。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，分析所设计方案的时间同步精度，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，画出比特信噪比与频率同步误差的关系曲线。 (5 In the three path Rayleigh channel, for direct sequence spread spectrum: (1) Please design a specific DS-CDMA code division guide-assisted channel estimation, receiver, etc were used to benefit the merger, the maximum ratio combining. With the Simulink simulation, BPSK BER performance measure, draw-bit signal to noise ratio and channel estimation mean square error of the curve, draw the signal to noise ratio and bit error rate curve, please explain in bit error rate 0.01, the two methods are combined performance of the different physical meaning. (2) frequency has been set up synchronization, a specific design of DS-CDMA single-stop sliding correlation method of time synchronization, simulation with Simulink (S-Function code their own way), analyze the design of time synchronization accuracy, draw bit signal to noise ratio and capture probability curve. (3) set time has been synchronized, a specific design of DS-CDMA frequency synchronization method, simulation using Simulink ()

关于高维数据降维的非线性方法ＬＬＥ代码，对学习数据降维有帮助(High dimensional data on the nonlinear dimensionality reduction methods LLE code, data dimensionality reduction in learning help)

很经典的国外模式识别教材MATLAB例程(Classic pattern recognition of foreign materials MATLAB routines)

说明：  数字信号处理中最小二乘法对信号进行处理的程序编写(Least squares in digital signal processing the signal processing programming)

说明：  lms algorethem update

QR算法求特征值的原理及实现方法，并附有程序代码。(QR algorithm for eigenvalue of the principle and method, together with program code.)

matlab环境中调用R语言命令和库。文件中附带简单安装步骤和matlab和R混合编程模板。方便matlab用户调用R语言的库。(call the R language commands and libraries matlab environment. File included simple installation steps and matlab mixed programming templates and R. Matlab convenient user calls the R language library.)

统计直方图 matlab 概率密度函数和统计直方图的拟合(Histogram matlab probability density function and a histogram fitting)

针对提出的故障信号，利用awgn加噪，对其进行小波软硬阈值降噪，提出一种改进阈值，利用五种自适应阈值函数sqtwolog、rigrsure、heursure、minimaxi和ddencmp中阈值选取原则，对软阈值、硬阈值和改进阈值进行降噪效果对比。(In view of the proposed fault signal, the wavelet soft and hard threshold de-noising is carried out by AWGN adding noise, and an improved threshold is proposed. The threshold selection principle of five adaptive threshold functions, sqtwolog, rigrsure, heursure, minimaxi and ddencmp, is used to compare the soft threshold, hard threshold and threshold value.)