FilterInMatlab

基于FFT的比值算法，是用比值法实现的MATLAB程序。 (Based on the ratio of FFT algorithm, is the ratio method using the MATLAB program realize.)

利用matlab对图像进行灰度调整、拉伸处理和边缘检测(Use matlab image grayscale adjustment, stretch processing and edge detection)

用Matlab作图时，特别是所作的图是要用于科研论文投稿时，对图的大小有一定要求。但用缺省设置作图时，图的大小不能控制，而且常常有大块的空白。本程序可控制图的大小和位置，并能自动去掉空白。(Using Matlab mapping, especially of the map is to be used for scientific research papers submission, the size of the map has a certain requirement. However, when using default settings mapping, map the size of control, often have large gaps. This procedure can control the map size and position, and can automatically remove blank.)

说明：  数字滤波器的设计,用双线性变换设计N阶巴特沃斯低通数字滤波器。(The design of the digital filter, using bilinear transformation design N order butterworth low-pass digital filter.)

差分检测的程序，包括一个调制程序，以及两个检测程序：一个是比较复杂但是易于理解的，一个是简便方法。对于理解调制解调的初学者来说，很有帮助(Differential detection procedures, including a modulation process, as well as two testing procedures: one is more complicated but easy-to-understand, one is the easy way. For understanding the modulation and demodulation for beginners, very helpful)

说明：  这是利用改进的kalman滤波来处理GPS信号，通过与传统的kalman滤波比较得到较好的效果。直接解压，就可以导入work里运行。(This is the improved GPS kalman filter to process the signal, by comparison with the traditional kalman filter get better results. Direct decompression to work can be imported to run. )

matlab得接收机放入仿真程序，很有参考价值，值得学习一下(matlab get the receiver into the emulation program, useful and worth learning about)

说明：  提取ERP,从matlab的数据文件中提取出脑电数据，并通过输入的信噪比进行滤波，这是第二部分 脑电数据文件(abstract ERP)

This is the JPEG compression

语音信号的iir滤波器设计,从带有噪音的信号中提取原始声音.目前，MP3播放器一般功率放大器的工作频率范围就是这个范围。但是大部分有用的和可理解的信息的频率在200到3500Hz之间。所以我们可以在这个范围间滤波，达到使声音可理解的要求。现将数字滤波器的设计指标设为通带截止频率fb=600HZ,阻带频率fc=1200HZ,通带波纹Ap=1dB，阻带波纹As=40dB,要求确定H(z)。(design of the iir filter, get the original voice without noise)