DFsystem

implementation of 1D dwt in matlab

说明：  此程序为DS-CDMA链路中加入基于子空间的PASTd多用户检测方法。系统中采用m序列阔频，可以通过高斯信道或瑞利信道。可以直接运行得到不同信噪比下的误码率曲线。(This procedure for the DS-CDMA link by adding space-based sub-PASTd multi-user detection methods. System m sequence used in wide-band, you can channel through the Gaussian or Rayleigh channel. Can be directly run different SNR BER curves.)

产生L＝31的GOLD序列，它由两个移位寄存器输出的模2相加而产生(have L = 31 GOLD sequence, which consists of two shift register output mode and have a combined total of 2)

基于OFDM技术的无线局域网系统设计，要求按照IEEE802.11a协议的要求，使用Simulink构建发送端和接收端。首先在高斯噪声信道的要求下，产生它特有的帧格式。(OFDM-based wireless LAN system design technology requirements in accordance with the requirements of IEEE802.11a protocol, using Simulink to build the transmitter and receiver. First, at the request of the Gaussian noise channel, resulting in its unique frame format.)

该文档介绍了空域、频域图像增强的基本内容，并包含MATLAB程序(This document describes the spatial frequency domain image enhancement of the basic content and contains the MATLAB program)

说明：  求瞬时频率必不可少，MATLAB系统不自带的，下载后放在MATLAB到toolbox，然后在EMD文件夹下，更新MATLAB路径即可。运行emd即可出现频谱分析图。(It is necessary to find the instantaneous frequency. The MATLAB system does not come with it. After downloading, it is placed in the MATLAB to toolbox. Then, under the EMD folder, the MATLAB path can be updated. The spectrum analysis diagram can appear when EMD is run.)

说明：  实现卡尔曼滤波，可以看出，滤波过程是以不断地“预测—修正”的递推方式进行计算，先进行预测值计算，再根据观测值得到的新信息和kalman 增益（加权项），对预测值进行修正。由滤波值可以得到预测，又由预测可以得到滤波，其滤波和预测相互作用，并不要求存储任何观测数据，可以进行实时处理。(Kalman filtering, can be seen, the filtering process is constantly &quot forecast- Fixed&quot recursive manner calculated to predict the value of the first, and then according to the new information should be observed and the kalman gain (weighted items), on predictive value of the amendment. Value can be predicted by the filter, but also can be filtered by the forecast, and its interaction filtering and prediction, does not require the storage of any observational data, real-time processing.)

基于matlab 搭建的跳频系统的源代码。(Frequency hopping systems built based on matlab source code.)

一本matlab入门书籍的附带程序文件，很丰富，对于matlab初学者来说很有用！(A matlab entry books attached program files, very rich, very useful for matlab beginner!)

Small signal stability