123reasurchmethod

针对HHT中存在的边界效应，提出了镜像拖延发改进EMD的分解过程。并提供了英文原版文献便于理解。适用于HHT研究的提高研究学习(improved HHT base on masking technology. in order to reduce the end effect in hilbert huang transform)

等间距线性阵列，阵元间距d= λ /2，等幅加权，目标方位φr = 0°，无噪声。 分别仿真计算阵元数M=8 、16时的阵列方向图，定性分析产生的原因。（可通过3dB波束宽度计算公式说明） (Equally spaced linear array, the array element spacing d = λ/2, equal amplitude weighted target azimuth φr = 0, no noise. , Respectively, the number of array elements M = 8 and 16 when the array pattern, qualitative analysis to produce simulation. (Available by 3dB beamwidth formula noted))

Mann-Kendall检验方法的matlab程序(The matlab model for Mann-Kendall test method)

STATCOM working model with voltage satbility

灰色关联算法的MATLAB仿真实现，可用于态势预测(MATLAB simulation gray correlation algorithm, can be used to predict the trend)

采用经典FFT算法对dqpsk信号进行频率估计，并在高斯信道下绘制估计结果图。(The classical FFT algorithm is used to estimate the frequency of DQPSK signal, and the estimation result graph is drawn in the Gaussian channel.)

Jafarkhani differential STBC matlab procedure, at different signal to noise ratio, the system compares the SER and BER. The use of 2-fat one admission, Rayleigh fading channel

：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T (hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号频谱 ) xlabel( f /Hz ) subplot(212) plot(f,abs(y1)/N) title( 低通滤波，截止频率90Hz ) xlabel( f /Hz ))

programas de matlab, para aplicaciones de ax=b

本程序可以实现求函数的信噪比及函数的均方差(The variance of this program can realize the function of SNR and function)