Fdtd_1

EMD分解可以运行的MATLAB程序用于经验模态分解(Empirical Mode Decomposition Decomposition The program can be run very well with a lot of support to download)

将Hex格式的数据转成Mif格式，供FPGA搭建系统时初始化RAM.(Hex format data will be converted into Mif format for initialization when the FPGA set up the system RAM.)

用MATLAB GUI工具搭建的电机上位机程序。包括串口功能模块，转速在线画图模块和位置在线画图模块，非常适用于电机调速过程的调试和演示工作。(The host motor control program using MATLAB GUI tools is built.Including the serial port function module, speed online plotting module and position online plotting module which is applicable for debugging and demonstration during the motor control project.)

说明：  绕线式异步电动机带负荷启动，其转子串联电阻分级投切(Wound rotor induction motor with a load start, its rotor graded series resistance switching)

说明：  cluster selection based on fuzzy rules

本程序是利用单端电气量依据行波原理实现故障测距的程序，需要较高的采样率以提高精度。(This procedure uses traveling wave principle of the single-terminal electrical information in accordance with the procedure of fault location, it requires a higher sampling rate in order to improve accuracy.)

这是一个bpsk的循环谱程序，实现了bpsk的三维循环谱图，自己写的，希望对大家有帮助。(his is a loop BPSK spectrum program, realized the 3 d of BPSK cyclic spectrum diagram, write their own, I hope it can help you.)

,在强干扰中提取信号,不仅要求有一定的信噪比,而且必须对信号作恒虚警处理.在自动检测系统中,对一定的检测门限来说,当干扰电平增大几分贝,虚警率就会大大增加,致使显示器画面饱和或计算机过载,这时即使有足够大的信噪比,也不可能做出正确的判决.为此在自动检测雷达中,必须具备恒虚警处(, extracting signal in strong interference, not only requires a certain signal-to-noise ratio, and must make constant false alarm processing for signal. In the automatic detection system, for a certain detection threshold, when the noise level increases, a few decibels will greatly increase the false alarm rate, led display screen saturated or computer overload, even if there is enough SNR at this moment, it is impossible to make the right decision. Therefore in the automatic detection of radar, must have a constant false alarm)

选取windows系统自带的ding.wav信号作为分析对象，在Matlab软件平台下，利用函数wavread对音频信号进行采样，记住采样频率和采样点数，听一下原始声音sound(y, fs, bits)。 （2）音频信号的频谱分析，先画出音频信号的时域波形；然后对音频号进行快速傅里叶变换fft(y,N)，N取32768，画出信号的频谱特性，加深对频谱特性的理解。 （3）根据频谱，反演时域特性，画出时域波形。寻找幅值最大的两个频率，此频率除以fft点数在乘以采样频率就是信号的主频，即可合成信号的时域图形，听一下声音。 （4）对原音频信号进行1024点的分段付立业分析meshgrid （5）根据主要频线合成音频，并画出时域图形，试听合成效果。 （6）采用线性插值（linspace）和傅立业反变换(fliplr, ifft)分别合成音频，并画出时域图形，试听效果。 (err)

matlab编写的对二值图像的数字水印添加与提取程序。压缩包中有示例图片。可以添加水印，结果肉眼不易分辨出变化，不影响使用。可加入信息长度达100个字节。提取时可验证是否被修改过，如修改不严重，可提取隐藏信息，如果修改过多，则只能确定是否有修改，而不知道隐藏的信息是什么(matlab prepared binary image of the digital watermark added and extraction procedures. Compression package has sample images. Can add watermarks, the results of the changes are not easily distinguishable from the naked eye, does not affect use. Can be added to the information length of 100 bytes. Verifiable extraction has been modified, such as modification is not serious, can extract hidden information, if too many modifications, you can only determine whether changes were needed, they do not know what information is hidden)