SIFT

信道仿真的很好程序，可以实现不同参数情况下的信道仿真，比如超宽带系统的室内多径环境信道仿真(channel simulation is a good procedure, can be achieved under different parameters of the channel simulation. For example, UWB system indoor multi-path channel simulation environment)

主成分分析(Principal Component Analysis, 简称PCA)是一种常用的基于变量协方差矩阵对信息进行处理、压缩和抽提的有效方法。 (The principal component analysis (Principal Component Analysis, PCA) is a common covariance matrix of information processing, compression and extraction.)

模拟两个相干的的窄带信号。阵列的阵元数为10，快拍数为200，信号入射方向分别为20°，60°，阵元间距为入射信号波长的1／2，信噪比为20dB。分别用MUSIC算法和改进MUSIC算法进行仿真。仿真结果如下图所示(MUSIC algorithm is improved compared with the simulation of signal coherent MUSIC algorithm. Two coherent analog narrowband signal. Array element number of the array 10, the number of snapshots 200, a signal incident directions, respectively 20 °, 60 °, array element spacing is 1/2 of the wavelength of the incident signal, SNR is 20dB. Respectively MUSIC MUSIC algorithm and improved algorithm simulation.)

kalman滤波器的Matlab验证，以及迭代算法的实现(kalman filter Matlab validation, and iterative algorithm)

butterworth lowpass filter used for finding speech signal.

能量熵的计算，小波包分析提取振动信号中的特征频率，借鉴了主成分分析算法（PCA）。( Energy entropy calculation, Wavelet packet analysis to extract vibration signal characteristic frequency, It draws on principal component analysis algorithm (PCA).)

matlab processing and realization of the voice, very useful

说明：  基于MATLAB/SIMULINK的光伏电池模型，可调整电压电流光照温度(Photovoltaic cell model )

DISCRETE COSINE TRANSFORM, SINE TRANSFORM, HADAMARD KERNEL, HAAR KERNEL , MEDIAN FILTERING

说明：  神经网络激活函数代码，有代码有图，可以直接用来学习使用。(Neural network activation function code, there are codes and graphs, can be directly used to learn to use.)