doppler

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.

用matlab编写的三维魔方模拟显示，直接运行first.m即可(Three-dimensional cube simulation using matlab display, can be run directly first.m)

在mit心电数据库下载的txt格式的心电信号(In the MIT ecg download a database of ecg signals the TXT format )

利用公式画图 BPSK、BOC的理想自相关函数，以及数字畸变自相关函数情况下的相关函数(Using the formula to draw BPSK, the ideal autocorrelation function of BOC, and digital autocorrelation function in the case of correlation function)

隐马尔科夫链作为故障诊断和识别的手段，有事例和程序详解(Hidden Markov chain as a means of fault diagnosis and identification, there are detailed examples and procedures)

关于光OFDM中非对称限幅ACO-OFDM 中采用不同进制调制的MATLAB程序，有BER性能仿真(About MATLAB program with asymmetric modulation in asymmetrically-limited ACO-OFDM in optical OFDM, with BER performance simulation)

基于SVR的非线性系统的辨识和校验，辨识信号为幅值为2的随机信号(Nonlinear systems based on SVR identification and validation, identification signal is a random signal amplitude of 2)

说明：  利用matlab实现牛顿迭代法在实数域和复数域上近似求解方程(Using MATLAB to realize Newton iteration method to approximate the equation in real and complex fields)

this program basically implementation of new scheduling algorithm in NS3 for LTE/4G. it is developed in ns3 which is open source platform used cpp.

用于脑部分割的一个简单的MATLAB程序(For brain segmentation with a simple MATLAB program)