feijeng

CSI in a channel no awgn

G-P算法计算关联维数，可以运用在混沌时间序列的瓦斯浓度预测研究中(GP algorithm to calculate the correlation dimension, you can use the gas concentration in the prediction of chaotic time series in)

这是MATLAB图形界面设计（英文原版），有需要的下下来看吧(MATLAB graphical interface design (English original), there is a need in the next down and see)

光伏发电的MATLAB仿真模型（mdl文件），电MPPT采用的是扰动观测法（P&O),与大家分享！(Photovoltaic power generation MATLAB simulation model (mdl file), electric MPPT is the disturbance observer Act (P & O), to share with you!)

NC-OFDM在六径瑞利衰落信道下的性能分析(NC-OFDM in the six path Rayleigh fading channel performance analysis)

用matlab进行科学计算和工程应用的教程(Using matlab tutorials scientific computing and engineering applications)

coherent detection matlab simulink

BP神经网络容易陷于局部极小值，PSO算法在无约束非线性函数优化方面性能优越，通常可以直接找寻到全局最优解，即使不能搜多到全局最优解，也距离全局最优点不远。当然，基本PSO算法陷入局部极值也是有的。对于这个缺点目前还没有找到比较有效、省市的解决方案。本案例实现利用PSO算法和BP算法共同训练神经网络，先将网络进行PSO算法训练，然后BP算法接着进行小范围精细搜索，PSO算法训练神经网络的本质就是将输出误差函数（即能量函数）看成目标函数，PSO对能量函数进行全局寻找最小值。(BP neural networks are prone to local minimum values. The PS algorithm has superior performance in the optimization of unconstrained nonlinear functions. It can usually find the global optimal solution directly. Even if it can not find more global optimal solutions, it is not far from the global best. Of course, there is also a local extreme of the basic PO algorithm. For this shortcoming, there is no more effective, provincial and municipal solution. This case realizes the use of the SO algorithm and the BP algorithm to train the neural network. First, the network is trained in the SO algorithm, and then the BP algorithm is followed by a small range of fine searches. The essence of the PO algorithm training neural network is to regard the output error function(ie, the energy function) as the objective function, and the PO seeks a global minimum value for the energy function.)

this code can be use in prediction filter of seismic data.

随机信号功率谱分析 (1) 生成信号，被淹没在在噪声中； (2) 试用周期图法估计信号的功率谱； (3) 选用不同窗，使用修正周期图法估计信号的功率谱； (4) 对一段语音信号，使用LD算法估计其功率谱； (5) 详细列出功率谱估计的步骤和原理。 (power spectral analys)