velmodel

采用有限差分方法模拟计算高斯光束在自由空间传播过程。(Simulation using the finite difference method of Gaussian beams in free space propagation.)

说明：  在MATLAB中编写实现图像的不同级别小波分解算法；2选择合适的小波基；3对经典的几幅黑白和彩色图像进行DWT变换；4实现零树、基于塔式网格矢量量化、基于LBG算法、基于标量量化等小波变换编码；5得到分析比较结果。达到的目的：1综合训练学生编程的能力；2对高数、计算方法、程序设计、数据结构、算法、数字图像处理等课程的复习和运用；3可培养学生的算法设计和分析能力。(in MATLAB prepared to achieve different levels of image wavelet decomposition algorithm; Choice of two small Porgy; Three pairs of classic pieces of black-and-white and color images DWT; Four zero tree, grid-based Tower vector quantization, LBG-based algorithm, based on the scalar quantization Wavelet Transform Coding ; 5 analyzed the results of the comparison. The purpose : a comprehensive training program students; Two pairs of the high number and the method of computation, programming, data structures, algorithms, digital image processing and review of the curriculum used; Three students can develop the algorithm design and analysis.)

说明：  讲述的直接序列扩频通信系统从信号产生，发射，信道传输，接收整个系统的程序(this is matlab for DS_SS system)

说明：  solves air combustion of methane in matlab

function [a,b,err] = shanks(x,p,q) SHANKS Model a signal using Shanks method ---- Usage: [a,b,err] = shanks(x,p,q) The sequence x is modeled as the unit sample response of a filter having a system function of the form H(z) = B(z)/A(z) The polynomials B(z) and A(z) are formed from the vectors b=[b(0), b(1), ... b(q)] a=[1 , a(1), ... a(p)] The input q defines the number of zeros in the model and p defines the number of poles. The modeling error is returned in err.

burg 的matlab程序，可进行功率谱计算(burg of Matlab procedures, the power spectrum can be calculated)

用mlp模型预测，用mlp模型预测，用mlp模型预测(use mlp model for prediction)

多址接入协议仿真——都可以运行仿真出图！(Multiple access protocol simulation)

建立Jakes模型，生成Rayleigh信道。以此为基础，研究不调制，及DSPK等方式的调制下，均衡技术（尤其是迭代均衡）的给误码性能带来的增益。(To build the Jakes model,we can get the Rayleigh channel,on the basis of which we study on the benefit of equilization(Iterative equilization specially) in DSPK modulation.)

该文件采用BBS算法能够实现盲信号的分离，分离效果很好，输入为两种信号的非线性叠加，经过仿真效果很明显！(The document can be achieved using BBS algorithm for blind signal separation, separation a good effect, input non-linear superposition of two kinds of signals, through simulation effect is obvious!)