Fading_CDMA

说明：  高斯分布期望优化（em）算法matlab实现，流量矩阵模型(Optimization of Gaussian distribution expectations (em) algorithm matlab realized, the flow matrix model)

针对OFDM系统，分成链路级仿真和系统级仿真两个部分。为了降低系统级仿真的复杂度，采用链路级仿真的部分结果。(It contains mainly two parts, i.e. link-level simulator and system-level simulator. Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx. Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. SNR mapping table, that can be used for the system-level simulation. System-level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural SNR, and finds the corresponding error rate. Link-level simulator support SISO, 1 by x MRC, 2 by 1 STBC/SFBC, 2 by 2 Alamouti, x by 1 Antenna selection, x by y antenna selection. System-level simulator, currently support only SISO and 1 by 2 MRC. To start with, go into the folder sys_link_simu, and excute the following commond from matlab: sys_link_simu_func(a,b) where a is the link ada)

适应值的选取是一个重要的运算过程，我们应该选择合适的适应值函数，这样才能够很好的选择最佳的变量值(Fitness selection process is an important operation that we should select the appropriate fitness function, so that it can be a good choice of the best value of the variable )

matlab_gui设计程序和相关程序开发，用于gui界面的设计(the process of matlab_gui)

信号谱分析之AR算法，计算信号频谱，用于随机信号分析(The AR_algorithm of analysis of signal，calculating the frequency spectrum ，is used for random signals！)

图像增强 灰度变换增强 空域滤波增强 频域增强 色彩增强 小波增强 (Enhanced gray-scale image enhancement transform spatial filter to enhance the frequency domain to enhance color enhanced wavelet enhanced)

详细介绍matlab、simulink，及视频图像，ppt(an introduction to matlab,simulink and vidio ,ppt.)

System damping model in simulink by a system springs, automovile

Filter Design using matlab

soliton f d t d solver