watermark-for-beginners

用周期图法求出的功率谱曲线和burg算法求出的AR功率谱曲线(p=50)(Periodogram calculated using the power spectrum curves and burg algorithm to derive the AR power spectral curve (p = 50))

说明：  利用粒子群算法优化svm参数，得到高精度的svm模型(The parameters of SVM are optimized by particle swarm optimization (PSO), and the SVM model with high precision is obtained)

A C Test --- The 0x10 Best Questions for Would-be Embedded Programmers(A C Test--- The 0x10 Best Questions for Would-be Embedded Programmers)

数字滤波器设计文档(自己作设计时用的ppt)(Digital Filter Design Documents (for their design of ppt))

HSV空间 基于火焰动态特征和运动检测的火灾检测(Based on the dynamic characteristics of the flame of fire detection and motion detection)

接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。 首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。 (The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program. First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af)

实现雷达的测速和测距，并观测雷达的多普勒效应(Achieve moving target radar speed and ranging, and realize the moving target of the Doppler effect)

说明：  数字电子技术基本元件--触发器 的程序, 支持多种触发器图形显示.(Trigger)

人工神经网络中的RBF方法 Matlab函数文件 可以方便调用(RBF Artificial Neural Networks)

光子晶体点缺陷程序，特别是做光子晶体缺陷的同行，可以借鉴一下。(Photonic crystal point defect procedures, especially peers to do the photonic crystal defects, can learn.)