xt_connlimit

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.)

Read ECG signal from MIT-BIT for signal processing. Basically used in MATLAB and other signal processing tools.

说明：  多尺度熵，用于对图像和各类数字信号进行处理(multiscale entropy used for the signal processing)

DPSK信号调制解调干扰性能分析，自己写的代码仅供参考！(DPSK signal modulation and demodulation performance analysis of interference, to write the code for reference purposes only!)

无线WIFI 2.4GHz天线制作资料，DIY资料(WIFI 2.4GHz wireless data antenna production, DIY information)

Beyond software architecture

method of false position with Aitken s D2-method

数字通信中的锁相环（PLL）完整程序，包括噪声处理，可用于GPS的的跟踪和捕获(the matlab code of PLL ,including how to deal with the noise ,which can be used to acquiring and tracking on GPS)

改变北天原点的卡尔曼滤波程序，基于matlab6.2实现(Change the origin of the north-day Kalman filter procedures to achieve based on matlab6.2)

声源波达方向估计，可以画出声源的方位二维图，(Sound source direction of arrival estimation, you can draw out loud the source of two-dimensional map of the azimuth,)