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本设计研究了纠错码及循环冗余校验码的原理，以及利用MATLAB对其进行了编程和编译仿真，实现了CRC循环冗余校验码的编码及校验，在接收端收到通过校验的码.(This design research the error correcting code and cyclic redundancy check code principle, and the use of the MATLAB programming and compile the simulation, realized the CRC cyclic redundancy check code coding and check, at the receiving end received through the check code.)

principal component analysis(PCA)主成分分析，Matlab实例代码(principal component analysis(PCA))

improvment of leach protocol

Matlab的模拟退火算法工具箱。并附有sample文件夹，有助于初学者进行学习测试。(The Matlab simulated annealing algorithm toolbox. With the sample folder, will help beginners learn the test.)

几个简单的遗传算法例子，一般有点相关基础的都能看懂，很容易的。(Few simple examples of the genetic algorithm, based on the general correlation can understand a little bit, very easy.)

本程序仿真了16QAM信号的载波相偏估计的HOS算法，整个算法实现分为（1）模拟发送端发送16QAM信号；（2）加入相偏来模拟通过信道后有相偏的测试信号；（3）利用HOS算法进行相偏估计与纠正；（4）输出星座图。(This procedure simulated a 16QAM signal carrier phase offset estimate of the HOS algorithm, the algorithm is divided into (1) analog transmitter to send 16QAM signal (2) by the inclusion of partial to simulate the channel after the phase offset of the test signal (3 ) algorithm using HOS phase offset estimate and correction (4) output constellation.)

说明：  计算四阶累积量 基于四阶累积量的DOA估计方法，同MUSIC-like方法一样，有很好的估计性能(Fourth order cumulant calculation of fourth-order cumulant based DOA estimation methods, with the MUSIC-like methods, have a good estimation performance)

一个简单的标准二阶线性自抗扰控制算法案例，用于初学者参考(A simple standard second order linear disturbance rejection control algorithm case, the reference for beginners)

GMSK信号调制和解调的仿真代码，包含一比特差分、2比特差分、鉴频等常用GMSK解调方案.之前上传的GMSK Modem差分相干、2比特差分解调存在问题。(GMSK demodulation schemes including one bit differential decoding, two bit differential decoding, differential coherent and digital frequency discriminating methods.)

sift算法的演示matlab程序 包括特征点的选取，算子的生成以及图像的自动匹配(sift the demonstration of the algorithm matlab program Including the selection of feature points, the automatic matching of the count of word generation and image)