QPSK_Rayleigh

数学建模中模拟卫星轨道的matlab源程序，由仿真数据模拟卫星轨道方程中的参数，得到轨道方程。(Matlab source, by mathematical modeling to simulate the satellite orbit parameters in the simulation data analog satellite orbit equation, the orbital equation.)

说明：  实现数字水印的嵌入，提取，以及受攻击后的提取(The realization of digital watermark embedding, extraction, and the extraction after attack)

This is a simulation code for laboratory 0, matlab simulation

用基础知识编的matlab车牌识别的小程序，对于初学者而言有点帮助哦～(With a basic knowledge of license plate recognition matlab series of small programs, for the beginner a little help, oh ~)

波达方向（Direction Of Arrival）估计，又称为谱估计（spectral estimation）、波达角（Angle Of Arrival）估计。一个信源有很多可能的传播路径和到达角。如果几个发射机同时工作，每个信源在接收机处形成潜在的多径分量。因此，接收天线能估计出这些到达角就显得很重要，目的是破译出哪个发射机在工作以及发射机所处的可能位置。通过测量辐射信号的波达方向（DOA全称Direction Of Arrival）或波达角（AOA）来估测辐射源的位置。理论上这种估计只需要两个接收阵元就可以确定辐射源的位置，但在实际中，由于受到角度分辨率、多径和噪声限制，所需阵元通常要多于两个。DOA定位技术原理是利用接收机处的阵列天线和波达方向（DOA）估计技术来确定一个从接收机到信源的波达方向线，即为方向线（LOB），最后利用多个接收机估计的DOA进行三角测量，方向线的交点就是信源的估计位置。(DOA (Direction Of Arrival) estimation , also known as spectral estimation (spectral estimation), angle of arrival (Angle Of Arrival) estimation. There are many possible sources a propagation path and the angle of arrival . If several transmitters simultaneously, a potential source for each multipath component at the receiver. Therefore, the receiving antenna can estimate the angle of arrival becomes very important, which aims to decipher the location of the transmitter at work as well as possible in which the transmitter . By measuring the radiation signal DOA (DOA stands for Direction Of Arrival) or the angle of arrival (AOA) to estimate the location of the radiation source . Theoretically this estimate requires only two receiving array element can determine the position of the radiation source , but in practice , due to the angular resolution , multipath and noise limits , usually required more than two array elements . DOA positioning technology is the use of an array of antennas at)

Small signal stability analysis of a multi machine system

电力传输线阻抗分析 matlab,pi 传输线频率特性分析(Power transmission line impedance analysis matlab, pi the frequency characteristics of transmission line analysis)

说明：  课程设计上编写的qpsk译码的程序，matlab的开发环境，很实用(Curriculum design program written qpsk decoding, matlab development environment, it is practical )

gmdH的MATLAB源代码，是主程序，也就是gmdhbuild.文件。与之配套的测试文件gmdhtest.m、输出误差gmdhpredice.m会接着发出(gmdH the MATLAB source code is the main program, which is gmdhbuild. file. The related test files gmdhtest.m, will then send the output error gmdhpredice.m)

阵列信号处理课件，详细系统的讲解了阵列信号处理的方法与算法(Array signal processing system, detailed explanation of the array signal processing method and algorithm )