pupil-center

查找ldpc校验矩阵中的6环，并将其记录到txt文件中(Find ldpc check matrix of the six rings, and its records to a txt file)

基于平方包络的PSK 信号的码元速率估计。(Symbol rate is estimated based on square envelope QPSK signal. mpsk function and test_signal in cwt compressed package.)

利用matlab写成的窄带噪声发生，高斯白噪声的生成程序，构成不同频率的调制信号。( Using matlab written narrowband noise occurs, Gaussian white noise generator, Constituting the modulated signals of different frequencies.)

MATLAB实现快速正交变换，与传统的FFT算法相比拥有更高的分辨率，但是运算时间较大， 在目标检测、频率分析、降噪方面都有着广泛的应用(MATLAB to achieved FOS_convert, compared with the traditional FFT algorithm has a higher resolution, but the computation time is large, the target detection, frequency analysis, noise reduction have a wide range of applications)

function PSNR2 = psnr(I,I_iter) 计算峰值信噪比 I : 原始信号 I_iter : 加噪信号(function PSNR2 = psnr (I, I_iter) calculate the peak signal to noise ratio I: the original signal I_iter: adding noise signal)

本程序利用平方环实现载波同步，使用锁相环进行跟踪相位偏移(This program makes use of the square ring to achieve carrier synchronization, with the use of PLL to track the phase shift)

一种贪婪算法：正交匹配追踪算法的matlab代码(matlab code of orthogonal match pursuit algorithm)

这是一本MATLAB仿真参考书，对于初学者很有帮助(This is a MATLAB simulation of reference, useful for beginners)

用music算法实现对一个正弦信号频率的估计(Realization of a sinusoidal signal frequency estimation algorithm with music)

基于MATLAB的通信系统仿真应用实例详解，这是第1卷。(MATLAB-based simulation of communication systems application examples explain, this is the first volume one.)