fdtd_1d

这是一个OFDM系统的信道估计仿真MATLAB，分析了基于训练序列的估计方法(This is an OFDM system channel estimation simulation MATLAB, analysis of the estimation method based on training sequence)

matlab模拟把RF信号和LO信号输入到mixer里得到IF信号。(simulate for put the LO signal and the RF signal into the mixer to get the IF signal.)

应用LMS算法去除噪声，纯净信号为各种数字调制信号，本程序中选的是数字调幅信号8ASK，噪声是高斯白噪声，信噪比可以任意指定。(Application of LMS algorithm to remove noise, clean signal for a variety of digital modulation signal, this procedure is successful digital AM signal 8ASK, noise is white Gaussian noise, signal to noise ratio can be specified.)

说明：  现在手头有一个matlab程序，是关于如何改变坐标轴范围的。跟大家分享下！(change the range of the axis)

Continue to upload, you should upload at least five source codes/documents, you can download more than 200 sourcecodes/documents after administrator checking the files you uploaded. Thank you!

matlab simulation of four quadrant chopper

说明：  一套水文时间序列分析程序，包含去趋势，拟合，提取周期等(matlab，used for hydrogen analyse)

《Matlab遗传算法工具箱及应用》Sheffield大学gatbs工具箱所有算例下载及调试说明(" Matlab toolbox and application of genetic algorithms" Sheffield University, all gatbs toolbox download and debug an example that)

How to start or stop a windows NT service.

实现希尔伯特-黄变换的功能，并带有一段测试数据。希尔伯特-黄变换是使用EMD分解将信号分解为本征模态函数（IMF），然后求得IMF分量的瞬时频率。其对于非稳态和非线性信号具有优良的效果。(The function plot_hht is a realization of the Hilbert-Huang transform (HHT). The HHT decomposes a signal into intrinsic mode functions (or IMFs), and obtain the instantaneous frequency data. It is designed to work well for data that are nonstationary and nonlinear.)