modulasi_qam

这是一个改进的SFLA（混合蛙跳算法），使用MATLAB 实现，代码简单并且实用，欢迎下载。(This is an improved the SFLA (shuffled frog leaping algorithm), using MATLAB to achieve, the code is simple and practical, welcome to download.)

这是用于通信系统中MIMO干扰对齐的算法，此算法通过对齐多小区干扰，提高通信系统的性能。(This is used in the MIMO communication system of interference alignment algorithm that by aligning the multi-cell interference and improve performance of the communication system.)

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。(First, according to the characteristics of the short training word correlation operation, the signal reaching the detector, when the detected correlation value is greater than the threshold after a certain number of times that a signal arrives. And then the characteristics of long training word, the correlation operation for the FFT window starting position of an OFDM symbol estimate. The estimated position of the FFT window, the first small frequency offset in the time domain estimation, the two long training word small frequency offset compensation, the FFT operation, the FFT result of the operation for integer frequency offset estimate. These parameter estimation is completed, the data can be demodulated on. The first portion of the data for a complete frequency offset compensation, and based on the estimated FFT window position of the FFT operation to obtain frequency domain data, demodulated. Then corresponding to the position of the pilot subcarriers are extracted on pilot inform)

线性调频脉冲雷达信号的整个处理流程，包括脉冲压缩、MTI、MTD。代码规整，注释详细。(The whole LFM radar pulse signal processing,concluding match filtering、MTI、MTD.the code is clear and complex, the code annotation is detailed. )

这是matlab的相关ppt，基本的一些操作和讲解，方便初学者更快的熟悉。(This is related to matlab ppt, and explain some of the basic operations, faster familiar easy for beginners.)

说明：  模糊控制PID的simulink仿真(Simulink simulation of fuzzy PID control)

先进PID控制方法的matlab仿真刘金坤编著有编好的程序很有用 (Advanced PID control method for a matlab simulation program has made very good use)

A Fractional Order PID Tuning Algorithm for A Class of Fractional Order Plants

循环冗余校验(CRC)的生成多项式为CRC-16: x16+x15+x2+1。(CRC-16: x16+x15+x2+1.)

CLIPS Language ( C Language Integrated Production System ) Document