仿真OFDM传输系统

ldpc编码，在加性高斯白噪声情况下描述出它的误码率随信噪比变化的情况(ldpc coding, in the additive white Gaussian noise cases, describe its bit error rate with signal to noise ratio the changes in the)

An XPath package started shipping as part of Java 5, so we can use it from MATLAB. This is a simple example showing how to use XPath from MATLAB.

由于衰减对于地震数据的影响，本程序改进质心频移法，求取VSP数据的Q值，具有比较好的稳定性和实用性。(Q inversion for VSP data)

计算ECG压缩程式，使用A100纪录，使用MATLAB撰写(Calculate ECG compression program, using A100 records, written using MATLAB)

关于matlab中文件打开关闭读取等操作的命令解释(Open the file on matlab operations such as close reading command interpreter)

this code provide to understanding SVM

平方根升余弦滤波器的设计.pdf ,很好的一篇介绍平方根升余弦滤波器的文章 (Design and implementation of square·——root raised cosine roll—Off digital filte)

It is a simulation OFDM with CP. there are modulator, FFT/IFFT, channel AWGN.

由于卫星与用户接收机二者的连线方向上存在相对运动，因此引起了载波和伪码的多普勒效应，再加上接收机晶体震荡频率漂移和卫星时钟频漂等原因。接收机实际接收到的卫星载波中心频率一般不再等于信号被发射时的标称频率，这就需要接收机在载波频率一维对信号进行搜索。同时，由于卫星到接收机的距离时刻变化，加上接收机始终相对于GPS时间的偏差又并不固定，因而接收信号的伪码相位值也在改变，所以接收机也要在码相位一维对信号进行搜索。扩频信号的捕获是一个对目标信号频率域和相位域进行的二维搜索过程。(Because of the relative motion between the two of the satellite and the user receiver, the Doppler effect of the carrier and pseudo-code is caused, and the frequency drift of the oscillation of the receiver crystal and the frequency drift of the satellite clock are added. The frequency of the satellite carrier center that the receiver actually receives is generally no longer equal to the nominal frequency of the signal being transmitted, which requires the receiver to search the signal in one dimension of the carrier frequency. At the same time, because the distance between the satellite to the receiver is changed, the deviation of the receiver always relative to the GPS time is not fixed, so the pseudo code phase value of the received signal is also changing, so the receiver also searches for the signal in the code phase. The acquisition of spread spectrum signal is a two-dimensional search process for the frequency domain and phase domain of the target signal)

《MATLAB R2008图形与动画编程实例教程》的源代码--第三章(" MATLAB R2008 examples of graphics and animation programming tutorial" source code- Chapter III)