xiandaixinhaochuli

STK 是卫星仿真工具包，由美国AGI开发的一款在航天工业领域中处于绝对领先地位的商品化分析软件。这里附上的是这个软件的教程。(STK is a satellite simulation tool kit developed by the United States AGI a field in the aerospace industry in the commercialization of the absolute leading position analysis software. Here attached is the software tutorial.)

数字信号的传输：1、实现滚降系数分别为0，0.5，1时信号时域频域和功率谱密度以及眼图的波形，并比较异同。 2、对(2/4/8)PSK,DPSK通信系统进行蒙特卡罗仿真，通过功率谱密度、误比特率来比较他们的性能(采用最佳接收方式)。 (Digital signal transmission: 1, to achieve roll-off coefficients were 0,0.5,1 time domain when the signal frequency and power spectral density, as well as eye-diagram of the waveform, and compare the similarities and differences. 2, (2/4/8) PSK, DPSK communication system, Monte Carlo simulation, through the power spectral density, bit error rate to compare their performance (to adopt the best way to receive).)

一个有趣的matlab编程的俄罗斯方块。编程思想值得一学！J向左，L向右，I变换，S向下。(An interesting matlab programming Tetris. Programming ideas worth learning! J to the left, L to the right, I transform, S down.)

2005年J.S.Smith提出的局域均值分解LMD(Local mean decomposition)的原始文献，该方法可用于故障诊断、特征提取、振动信号分析等多领域，是较EMD更为温和的一种自适应算法，目前是热门研究方法。(This is the original article about LMD——Local mean decompositon. Ihis method is a novel adaptive decomposition. It is more better than EMD and achieve more and more attention.)

DISCRETE FRACTIONAL FOURIER TRANSFORM

Discrete Orthogonal Polynomial Toolbox: DOPBox Version 1.5

emd用MATLAB编程，用幻灯片演示，很形象直观(emd MATLAB programming, using slide shows, a very visual image)

The codes included here require Matlab platform 7.0.0 or higher. The source codes have been written by the students who have undergone this subject. The codes are problem specific and not general. The principle aim was to develop softwares for illustration of computational methods and are generally far from optimal. Knowledge of any computer language is sufficient to change the parameters in the codes. A person well versed in Matlab should be able to modify these codes or write their own. It is a common knowledge that understanding the codes written by others is not a pleasant experience. Therefore, useful comments have been added in the codes to help users.(The codes included here require Matlab platform 7.0.0 or higher. The source codes have been written by the students who have undergone this subject. The codes are problem specific and not general. The principle aim was to develop softwares for illustration of computational methods and are generally far from optimal. Knowledge of any computer language is sufficient to change the parameters in the codes. A person well versed in Matlab should be able to modify these codes or write their own. It is a common knowledge that understanding the codes written by others is not a pleasant experience. Therefore, useful comments have been added in the codes to help users.)

三相并网逆变器下的LCL滤波器的谐波分析 给出逆变器输出电压和网侧电流的各次谐波表达式及其所占基波分量。 (lcl lcl lcl lcl)

说明：  sphereandML是主程序，性能接近最大似然ML检测，调用了spheredecode和spheredecodeinf两个子程序；(ml sd )