ofdm_simulation

灰色预测模型的matlab程序，用于对时间序列做预测。(Gray prediction model matlab procedure done for time series prediction.)

说明：  BP 算法的实现，分别包含了C++，Matlab，Forturn等几种语言的实现方法

matlab实现lsqr算法的源码，有强烈的参考价值，可用于地球物理反演。(matlab realize lsqr algorithm source code, there is a strong reference value, can be used for geophysical inversion.)

dc motor simulation in matlab

采用AR法模拟风速，计算时间较短，但精度相对于谐波叠加法略差(AR method using simulated wind speed, the calculation time is shorter, but the accuracy is slightly worse relative to the harmonic superposition)

虽然奇异值分解（SVD）和特征值分解（EVD的）是行之有效的，可以通过先进的设施设备先进的算法，它不是通常所说，有一个内在的迹象，可以显着影响的不确定性的结论计算及诠释来自其结果。我们提供一个解决方案，标志模糊的问题确定了从奇异向量的内积和个人数据载体签署奇异向量的迹象。该数据可能有不同的载体，但它有它自身的定位和实际意义的选择方向，其中多数的向量点。这可以通过评估发现了内心的签署标志产品的总和。(Although the Singular Value Decomposition (SVD) and eigenvalue decomposition (EVD) are well-established and can be computed via state-of-the-art algorithms, it is not commonly mentioned that there is an intrinsic sign indeterminacy that can significantly impact the conclusions and interpretations drawn from their results. We provide a solution to the sign ambiguity problem by determining the sign of the singular vector from the sign of the inner product of the singular vector and the individual data vectors. The data vectors may have different orientation but it makes intuitive as well as practical sense to choose the direction in which the majority of the vectors point. This can be found by assessing the sign of the sum of the signed inner products. )

模拟二维平面干涉图，I(x,y,t)=a(x,y)+b(x,y)*cos(ph(x,y)+w*t)(Simulation of two-dimensional interference pattern)

This is my simulation of PMSM. Hope you can edit and use it to your exercise. It is not actually correct but I think it will be useful for you.

OFDM SYSTEM SIMULATION SORCE

matlab自学经典教程，对初学者入门帮助较大(matlab self-classic guide more helpful to the beginner)