OpenSURF_version1c(1)

数字水印MATLAB编程中长用到的一些函数，Z字扫描和NC值计算，希望有帮助(MATLAB programming in digital watermarking used in some of the function of a long, Z word scan and NC values, hopes to help)

说明：  数据通信中误码检测机制的研究，使用MATLAB对二维奇偶校验码进行测试(Studies of Error Detection Techniques in Data Communications，two-dimensional parity check is simulated through MATLAB)

it just show the different type of signals and their matlab codes

16-QAM constelation Source code for 16-QAM constelation for various signal to noise ratio levels in dB

ldpc译码算法 实现ldpc的译码 20个字(ldpc the)

该程序基本涵盖了OFDM-16QAM系统传输的全过程，除了调制解调外，有添加循环前缀，加窗的过程。生成图像有各个阶段的时域、频域图，以及发射前后的星座图。(This basically covers the whole process of OFDM transmission- 16 qam system, in addition to the modem, have add cyclic prefix, plus the window procedure. Generate the image at various stages of time domain and frequency domain graph, and before and after the launch of the constellation diagram.)

信号为两个正弦信号加高斯白噪声，用levinson递推法进行功率谱估计。(Signal for two sinusoidal signal plus Gaussian white noise, with levinson recursive power spectrum estimation method.)

EOF 计算时空场X的EOF前10个模态.每个空间型的方差解释率 对应的时间系数 (特征向量)的特征值(EOF space field X, calculating the first 10 EOF modes. Each space type of variance explained by the corresponding time coefficients (eigenvectors) and eigenvalues)

判断一组数据服从何种分布：正态分布判，断泊松分布判断，γ分布判断，指数分布判断，rayleigh分布判断(Determine a set of data obey what distribution )

基于matlab 设计的滤波器程序，很实用。内容包括 FIR数字滤波器的设计、IIR数字滤波器的设计、FFT频谱分析及应用等。(wave filter of matlab )