DS_CDMA

说明：  伪随机码或称PN码，是扩频通信中不可缺少的一种序列。扩频通信，简单的说来就是通过一组相关性很强的伪随机序列，使原有的信号按照伪随机序列的特性出现。从波形上看，原有信号完全淹没于随机的噪声中，达到隐藏信号和抗干扰的目的。接受方只要有相同的伪随机序列，就可以通过伪随机序列很强的相关性将信号还原出来。而m序列，是扩频系统中最长用的伪随机序列。下面的代码就是基于matlab的生成m序列的代码，通过改变初始多项式的值，就可以生成不同阶数的m序列。(Pseudo-random code or PN code, spread spectrum communication is indispensable to a sequence. Spread spectrum communication, a simple to say that the adoption of a group of highly related to pseudo-random sequence, so that the original signal in accordance with the characteristics of pseudo-random sequence there. From the wave point of view, the original signal completely submerged in the random noise to hide the purpose of signal and interference. As long as the recipient has the same pseudo-random sequence, the pseudo-random sequence can be a strong correlation to restore the signal out. And m sequence spread spectrum system is the longest of the pseudo-random sequence used. The following code is generated based on m sequences of matlab code, by changing the value of the initial polynomial, we can generate a different order of the m sequence.)

包含两个部分：1传统粒子群算法优化BP神经网络 2改进的粒子群算法优化BP神经网络源代码(It consists of two parts: a traditional particle swarm optimization BP neural network 2 Improved particle swarm optimization BP neural network source code)

这是多个matlab源程序，主要功能是灰度图像和二值图像进行腐蚀和膨胀；dwt水印程序，猫脸变换程序。(This is a matlab source, the main function is to grayscale and binary image erosion and dilation)

This describes Alamouti coding in Genereal

异步电动机的变频调速，采用IGBT全桥逆变器(Variable-Frequency Induction Motor Drive)

转换测量卡尔曼滤波器综合应用实现，包括子程序(Converted Measurement Kalman filter integrated application implementations, including subroutines)

这个是基于matlab制作的KNN 识别器的写法(This is K-Nearest Neighbour classifier used in pattern recognition.)

MatLab7编程基础ppt, 适合新手(MatLab7 programming basics ppt, for novice)

Matlab program for railway abnormal detection and imaging,including GUI, open dlg, processing dlg and source code.

组合导航及滤波算法，组合导航及滤波算法组合导航及滤波算法(Navigation and filtering algorithms, integrated navigation and filtering algorithm and filter algorithm Navigation)