ber_rayleigh-channel

自己编的谱减语音增强谱减算法程序，带噪语音按帧处理的，利用寂静帧的语音段来估计噪声。(Own spectrum minus minus algorithm for spectral speech enhancement procedure of Noisy Speech by the frame of the treatment, the use of silence the voice frame to estimate the noise above.)

对两径瑞利衰落信道进行matlab仿真。使用同一载波通过两条瑞利信道，并显示输出结果，包括相移等变化。(Path of the two Rayleigh fading channel for matlab simulation. Using the same carrier passed two Rayleigh channel, and display the output results, including phase-shifting and other changes.)

两种先进的数字图像混沌加密方法,用MATLAB实现.经过调试.(Two kinds of advanced chaotic encryption methods, and use MATLAB to achieve. After debugging.)

说明：  使用维纳滤波器对信号进行处理，得到噪声状况下的信号，这个滤波器是数字信号处理中非常经典的一个。代码里还提供了维纳的AR参数估计(Wiener filter to use signal processing, noise signal conditions, this filter is digital signal processing in a very classic. There is also a code of the AR Wiener Parameter Estimation)

程序仿真了瑞利信道，分析和大量实测表明，多径效应使接收信号包络变化接近瑞利分布。在典型移动通信中，衰落深度达30dB左右，衰落速率约30~40次/秒。(Rayleigh channel simulation procedures, analysis and extensive test shows that the received signal multipath effect changes in the envelope close to the Rayleigh distribution. In a typical mobile communication, fading depth of about 30dB, the decline rate of about 30 to 40 times/sec.)

小波包分析提取振动信号中的特征频率，实现串口的数据采集，已经调试成功.内含m文件，可直接运行。( Wavelet packet analysis to extract vibration signal characteristic frequency, Achieve serial data acquisition, Has been successful debugging. M contains files can be directly run.)

we have a photo camera with DC Motor and closed loop controller is equal k/s^2+s+k. first,we shoul find ZOH,then we identify the system with ARX model that na=nb=2 Here,we want to identify the Dynamic Linear System. we use different inputs such as normal distribution,uniform distribution,...

Particle swarm optimization With linkage operator

锁相环和锁频环在数字costas环中的应用.pdf 一篇关于costa环路的新颖设计方案，包含大量的仿真图和性能分析，对学习锁相环有很大帮助(And frequency-locked loop PLL digital costas loop in the application. Pdf a novel about the costa loop design, contains a large number of simulation map and performance analysis are very helpful for learning PLL)

说明：  配电网潮流计算（40个节点），采用前推后代的方法(distribution network power flow calculation)