How-add-awgn-to-signal

在matlab下编程，实现对不同生硬的识别，效果非常好，能识别差别很小的不同声音。(At under matlab programming, implementation of different identification blunt, very good results to identify small differences in different voices.)

包含两个代码，分别是全局直方图均衡和局部直方图均衡，适用于不同情形(Global and local histogram equalization)

关于双模激光器的几个程序，可以直接使用。(Several programs for dual-mode lasers can be used directly.)

OFDM的调制代码，对于OFDM的调制可以加深理解(OFDM modulation code, for better understanding of OFDM modulation can be)

simple psk(phase shift key)

加窗程序，包含了各种分析窗，经过调试已经通过！(Windowed program, including a variety of analysis window, after debugging has passed!)

信号测量时，传感器优化布置的条件数方法。提供自由度信息，输出不同数量传感器的最优布置方案。(signal measurement, the sensor layout optimization of several methods. Provide freedom of information, the number of different sensor output optimal layout of the program.)

该程序用Matlab实现hilbert-huang变换，含EMD，HHT，边际谱等，有一些实例，较完善。(The program uses Matlab to achieve hilbert-huang transform, including EMD, HHT, the marginal spectra, there are some instances better.)

利用PID控制算法实现曲线的拟合跟踪，分别对阶跃曲线和正弦曲线进行控制，并比较拟合的误差曲线(Using the PID control algorithm curve fitting tracking, respectively, on the step and sinusoidal curve control, and compare the error curve fitting)

这本书介绍了matlab的变成方法和基本的数值算法在matlab上的实现，初学者可以看看(This book describes the methods and become the basic numerical algorithms are implemented on matlab matlab, the beginner can look)