xihua

This m-file simulates MPSK (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-limited channel).

Nonlinear Optimization Applications

自适应滤波算法，变步长nlms算法、wena滤波算法(Adaptive filtering algorithm, variable step-size nlms algorithm, wena filtering algorithm)

说明：  一个学习bp算法的MATLAB源代码，仅作学习交流之用(A learning algorithm bp MATLAB source code used only for study and exchange)

利用matlab的基本方法，求出矩阵的逆，体现matlab的矩阵功能。(Matlab using the basic method to derive the inverse matrix, the matrix reflect the matlab function.)

说明：  matlab下利用相位相关对待匹配图像完成配准(matlab treated under the matching images using phase correlation to complete registration)

Numerical Methods Newton-Raphson

把HHT和神经网络结合起来，识别出是否故障。对于HHT变换，这里用到的是它的IMF分解，然后用能量理论来判别哪些模组是虚假分量，哪些是是真实分量。对于EMD分解后的谱进行特征提取 ，利用的理论基础就是模糊熵。计算出真实 分量的模糊熵，作为输入层；输出层为两个神经元，为0（故障 ）1（正常 （正常 ）判别该信号是否出现故障。(The combination of HHT and neural network to identify whether the fault. For the HHT transform, here is the use of its IMF decomposition, and then use the energy theory to determine which module is false, which is true component. The theoretical basis for the feature extraction of the spectrum after EMD decomposition is fuzzy entropy. The fuzzy entropy of the real component is calculated, as the input layer, the output layer is two neurons, which is 0 (fault) 1 (normal) to determine whether the signal is faulty.)

自己写的关于弹载SAR的源程序，对初学者非常有用！(Write your own source code on missile-borne SAR, and very useful for beginners!)

全通滤波器对相位抖动和相位偏差进行相位调整(All pass filter adjusts phase jitter and phase offset by phase adjustment.)