M

We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.

％help avifile 可以把屏幕图片做成avi ％也可以用如下打开和播放avi ％ mv=aviread( 14.avi ) ％ movie(mv) ％ 指定源目录 str_src ％ 指定图片个数，PICNum( Help avifile can make avi screen images can also be used as follows to open and play avi mv = aviread (14.avi) movie (mv) specify the source directory specified str_src picture number, PICNum)

这个代码是用Matlab写的心形代码，是通过点的形式编写的，看起来很有意思。(This code is written using Matlab heart-shaped code, through the form of written, looks very interesting.)

Encrypt a picture using DES

semi supervised Isomap,matlab codes.

说明：  CDMA的matlab实现，程序中介绍了CDMA实现的算法以及实现的结果(CDMA, matlab implementation, the program introduces CDMA implementation algorithm and the results achieved)

matlab用于进行母线负荷预测，选择K作为样本的时间长度，T为连续预测的时间。数据格式为2个表格，一个是负荷数据一个是日期。(matlab used for bus load forecasting, K as the length of the sample, T is continuous forecast time. The data format is two forms, one is a load of data is a date.)

用功率谱进行跳频信号的检测，是一个行之有效的办法(With the power spectrum frequency hopping signal detection, is an effective way to)

利用bp系统预测北京98-05公交客运量(Bp system in predicting the use of public transportation passenger Beijing 98-05)

matlab的二值化代码,将一副路面的图形中的边界线,显示出来(matlab' s binary code, a road graph of the boundary line, displayed)