periodogram

matlab code to simulate Unscented kalman filter

说明：  三相可带不对称负载的变频器，12个IGBT，精度高，THD<1 (Three-phase inverter can be loaded with asymmetric, 12 IGBT, high accuracy, THD &lt 1 )

说明：  这是关于MIMO的消息传输方式的MATLAB仿真程序。(This is a message transmission on the MIMO mode of MATLAB simulation program)

在采样点之间的频率响应是由各采样点的加权内插函数叠加而形成的，因而有一定的逼近误差。该误差大小取决于理想频率响应的形状，理想频响特性变化越平缓，内插值越接近理想值，逼近误差越小；反之，如果采样点之间的理想频响特性变化越陡，则内插值与理想值之间的误差越大，因而在理想滤波器不连续点的两边，就会产生尖峰，而在通带和阻带就会产生波纹。用频率采样法设计的实际滤波器频率响应如图1所示。由图1可知，实际滤波器的阻带衰减取决于内插函数第一旁瓣幅度值的大小，其大小决定了所设计的滤波器的阻带性能。(Interpolation function superimposed between sampling points of the frequency response is weighted within each sampling point and the formation of, and thus have a certain degree of approximation error. The size of this error depends on the shape of the ideal frequency response and the ideal frequency response characteristic change is more gentle, interpolated and more close to the ideal value, the smaller the approximation errors Conversely, if the sampling point between the ideal frequency response characteristics of the steeper the change, and then the interpolated the larger the error between the ideal value, and thus in the ideal filter both sides of the discontinuity point, will produce spikes occurs ripple in the passband and stopband. Actual design frequency sampling filter frequency response is shown in Figure 1. Figure 1 shows, the actual filter stopband attenuation depending on the interpolation value of the size of the first side-lobe amplitude of the function that determin)

说明：  在VC++平台上的QDPSK编程，QDPSK是一种高性能 的调制技术。(In VC++ platform QDPSK programming, QDPSK is a high performance modulation technique.)

bearing fault matlab codes

三种元胞自动机模拟交通流的程序，分别基于184rule,和双车种的随机换道。考虑车辆长度(Three cellular automaton traffic flow simulation program, were based on random 184rule, and double lane change vehicles. Consider the length of the vehicle)

Algorithm for Frequency estimation

This function calculates discrate fourier transform for vector using the "Fast" method . (recursion )

一个3自由度全车simulink模型，可以进行车辆动力学及相关控制的研究(3 degrees of freedom a simulink model of the entire vehicle can be related to vehicle dynamics and control research)