snake

产生LFM信号-分析其频谱-运用频域匹配滤波器.m(LFM signal is generated- An analysis of the spectrum- the use of the frequency domain matched filter m.)

自己用matlab编写的滤波反投影重建程序，分别用空域卷积和频域乘积两种方式编写，滤波函数可以选择S_L或者R_L函数( filtered back projection reconstruction program, write in two types: airspace and frequency domain convolution , filter function can be selected R_L or S_L)

matlab简单示例练习,matlab2010版本，实用的教程算例。。。(Matlab simple example exercise)

matlab中值滤波源代码，对于图像处理的人员有一定的参考意义。。(median filter matlab source code for image processing personnel have some reference value. .)

说明：  半监督学习(Semi-Supervised Learning，SSL)是模式识别和机器学习领域研究的重点问题，是监督学习与无监督学习相结合的一种学习方法。半监督学习使用大量的未标记数据，以及同时使用标记数据，来进行模式识别工作。当使用半监督学习时，将会要求尽量少的人员来从事工作，同时，又能够带来比较高的准确性，因此，半监督学习目前正越来越受到人们的重视。(Semi-Supervised Learning (SSL) is a key issue in the field of pattern recognition and machine learning. It is a learning method combining supervised learning with unsupervised learning. Semi-supervised learning uses a large number of unlabeled data, as well as labeled data, for pattern recognition. When using semi-supervised learning, it will require as few people as possible to work, and at the same time, it can bring relatively high accuracy. Therefore, semi-supervised learning is receiving more and more attention.)

一个很好的灰预测Matlab程序，需要者速度下哦！(Gray predicted a good Matlab program for those who need speed Oh!)

说明：  非常全的GPS-MATLAB源代码，其中有很多的小程序，便于读者使用(Very full of GPS-MATLAB source code, many of them small program, easy to readers to use)

一篇很好的介绍11n物理层技术的文章，建议做相关工作的可以看看(ieee_circuits_systems wireless LAN Comes of Age Understanding the IEEE 802.11n Amendment)

仿真程序：首先需要用一个随机发生器产生（0.1）内的均匀随机数，然后再将该序列映射到对应的幅度电平｛Am｝。然后将这个范围再分成4个相等的区间，这些子区间分别对应于4个信号比特的符号00，01，10，11。检测器观察到r=Am+n，并且计算r和4种可能传输的信号幅度之间的距离，它的输出Bm就是相应于最小距离的信号电平。Bm与真正的的传输信号幅度比较，差错计数器用来对检测器产生的差错计数。(Simulation program: first need to use a random generator (0.1) the uniform random number, then the sequence is mapped to the corresponding amplitude level {Am}. Then this range has been divided into four equal intervals, these sub-intervals corresponding to four signal bits of the symbol 00,01,10,11. Detector observed r = Am+ n, and calculate r and 4 possible transmission distance between the signal amplitude, its output corresponding to the minimum distance Bm is the signal level. Bm and the real rate of transmission of the signal comparison, error detection counter is used to generate the error count.)

淘宝里卖的mpu6050模块，采用硬件卡尔曼滤波直接输出姿态角，省去大家复杂的IIC编写 (mpu6050 Data processing)