Digital_PAM_Communications

here is a code for some basic operations on speech signal..

td-scdma链路仿真扩频加扰，绝对能用。(td-scdma Link Simulation spectrum scrambling, absolutely can be used.)

matlab中创建m文件-S函数需要的模板(matlab m-files-S function in the preparation of the template)

对16进制的QAM调制信号的matlab仿真 已完美运行通过(On the 16-band QAM modulated signal matlab simulation has been run through a perfect)

分析了正弦信号分辨率问题，当采样频率相同时，点数越多，分辨率越高，频谱特性误差越小( Analysis the problem of resolution in a sinusoidal signal.When the sampling frequency is the same, the more points,the higher the resolution,and the error spectral characteristic is smaller.)

parks maclean algorithm for low pass filtering

这是一种优化的FCM算法 可以自动确定分类数 有关于c,m的改进(This is an optimization of the FCM algorithm to automatically determine the number of categories on the c, m improvement)

说明：  专家PID程序m源文件，可用于各种控制，算法已经验证(Expert PID program m source files, can be used for a variety of control algorithms has been verified)

微分方程（这里指的是常微分方程）指含有一次、二次、乃至高次微分未知数的方程。是解决偏微分方程、数理方程的基础。有许多特殊函数，都是为了无法得出多项函数或超越函数型式的解析解的微分方程而定义出来。这些特殊函数之所以重要，是因为它们描述了自然界中的某些现象，例如，电子的活动、鼓皮的振动、钟摆的摆动等等。(Differential equations (in this case is the ordinary differential equation) means containing one, two, and even high-differential equations unknowns. Is to solve the partial differential equations, mathematical equations based. There are many special functions, are not drawn to a number of functions or functions beyond the type of analytical solution of differential equations which define them. These special functions are important because they describe the nature of certain phenomena, for example, electronic activities, drum skin vibrations, pendulum swing, and so on)

微粒群(PSO)优化算法进行图像匹配程序，MATLAB版。(Particle swarm optimization (PSO) algorithm for optimized image matching program, MATLAB version.)