ofdm_signal_PSD

This code is about migration of seismic data.

小波分析非常好的学习资料，都是源码，希望对大家有所帮助！(Wavelet analysis is very good learning materials, all source code, want to help you!)

nonlinear amplifier effect on ofdm

超声波系统下的FFT仿真程序,可以将主要频率的波长滤波出来(FFT simulation program of ultrasonic system, can filter out the main frequency wavelength )

- Stone column play important role in infrastructure, improving soft soil. The behaviour of stone column, however, remains far well understood

分为5个部分： 3.1 M文件 3.2 程序控制结构 3.3 函数文件 3.4 程序举例 3.5 程序调试(Divided into five parts: 3.1 M Document Control 3.2 Functions 3.3 Document Structure 3.4 program debugging program, for example 3.5)

说明：  这是瑞利信道德仿真模型，用matlab 写的，比较使用方便。(letter moral simulation model was made using Matlab and relatively easy to use.)

simulink的仿真有两个阶段：一个为初始化，这个阶段主要是设置一些参数，像系统的输入输出个数、状态初值、采样时间等；第二个阶段就是运行阶段，这个 阶段里要进行计算输出、更新离散状态、计算连续状态等等，这个阶段需要反复运行，直至结束。(simulink simulation has two phases: one for initialization, this stage is mainly to set some parameters, such as the number of input and output system, initial state, the sampling time second stage is the operational phase, the Stages to calculate the output, update the discrete state, continuous calculation of the state, etc., this stage requires repeated runs to the end.)

根据横波纵波的原理演示横波与纵波的形成过程(formation of transverse and longitudinal waves)

Mass of Image for Image Moment Calculation.