gaojieqiyizhi

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.

分段异常信号实验，几个不同频率的信号叠加用HHT方法进行分解，是我做实验用的信号，验证无误，(Abnormal signal sub-experiment, several different frequency signal superimposed with the HHT method of decomposition, I did experiment with the signal, verify the correct)

图像模板匹配计算，逐象素移动计算当前模板数据，提取图像特征点(image template matching, pixel-by-mobile current template data, image feature extraction point)

The file introduces a method for maximum power point tracking of a photovoltaic array by incremental conductance.

说明：  《精通MTLAB最优化计算》第12章 二次规划 源码(&quot The most proficient MTLAB Optimization&quot Chapter 12 quadratic programming source code)

通过matlab对excel进行读、写、存等各类操作的一个小程序。(matlab for excel)

雷达信号压缩，一维信号的生成以及如何让拖尾压缩。(The radar signal compression, the generation of one-dimensional signals as well as how tailing compression.)

时差法在超声波测量流量中的应用程序,原吗利用相关法求得时差(time difference in ultrasonic flow measurement applications, the original use of the relevant law? Seek TDOA)

利用近远场外推做圆柱体雷达散射截面，并用fdtd方法。(Make use of the near and far field extrapolation cylinder RCS and use fdtd method.)

对光纤系统中的NRZ时域和频域特性进行了描述，值得一看(fiber NRZ system of time-domain and frequency domain characteristics of the description of an eye-catcher)