PSNR_Stegnography

基于hough变换的圆形检测，非常好用。(Based on hough transform circle detection, very easy to use.)

说明：  五点三次平滑法可用作时域和频域信号平滑处理。对时域作用是减少混入振动信号中的高频随机噪声。对频域是能使谱曲线光滑。(Three five-point smoothing method can be used as time domain and frequency domain signal smoothing. Effect on the time domain vibration signals to reduce high-frequency mixed with random noise. On the frequency domain is the spectral curve can smooth.)

Matching pursuit algorithm

信号处理中短时傅里叶变换（STFT）的实现，可用于实时系统，实时语音处理或者分段的FFT计算，亲测可用，拿走不谢！(The implementation of short time Fourier transform (STFT) in signal processing can be used for real-time system, real-time speech processing or segmented FFT calculation!)

说明：  利用matlab的gui设计的带有输入和输出功能的界面图形，可视性很强，自己独立编写，原始数据和图形，学习非常值得(Uses the Matlab GUI design to have the input and output function the interface graph, the visibility is very strong, writes independently, the original data and the graph, the study is very worthwhile.)

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)

Code in Matlab to find the wave and the radius of fiber.

关于无线信道的多普勒谱 无线信道中的多普勒谱有一种经典谱请解释产生这种谱形状的机理；(1. On the radio channel of the Doppler spectrum (2) wireless channel Doppler spectrum has a classic spectrum (classic spectrum), please explain such a spectral shape of the mechanism )

说明：  例题全部代码. 薛定宇, 陈阳泉. 高等应用数学问题的Matlab求解.(All the code examples. Xue Dingyu, Chen Yangquan. MATLAB to solve higher applied mathematical problems.)

基于高阶循环累积量的SQAM信号调制识别算法(Order cyclic cumulant based modulation recognition algorithm SQAM)