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Design a linear phase minimum order FIR Band Stop filter to stop the frequency band 0.45π to 0.55π with atleast 60dB attenuation at the edges. Further -3dB frequencies are required to be at 0.3π and 0.7π. 1. Plot the frequency response of the psuedo magnitude function using (a)rectangular window, (b)Hann window and (c) Hamming window. 2. Plot the frequency response for Rectangular and Hamming window for a length of 1024 to demonstrate the fact that the increase in the length, doesn t reduce undershoot and overshoot in Rectangular window.

形态学的膨胀，腐蚀，细化的MATLAB的源代码，对初学者有用(Morphological expansion, corrosion, thinning of MATLAB source code, useful for beginners)

说明：  将小波变换应用于信号消噪,去除冗余分量后，提取信号主要特征(the wavelet can be applied to the signal denoise and feature extraction)

平滑处理是信号分析的预处理方法之一，本程序采用5点滑动平均法对信号进行平滑处理(Smooth processing is one of the pretreatment method of signal analysis, this program uses the 5 moving average method to smooth signal.)

用matlab实现升余弦滤波器的设计，其中滚降系数可以根据自己需要自动调节(Using matlab to achieve raised cosine filter design, roll-off factor which can automatically adjust according to their needs)

This is the project is image compression based dwt algorithm

用matlab编程，程序将PCA算法用于图像中物体轮廓提取，可以看到在轮廓处，特征值会出现剧烈震荡(With matlab programming, program the PCA algorithm is used to extract the outline of objects in the image, you can see in the outline at the eigenvalues ​ ​ will be turbulent)

matlab 源程序，对于编程的同学很用，大家看看吧(Matlab source for programming with the very students, we look at it)

基于Matlab的移动通信中多径衰落信道的仿真基于多径传输和多普勒频移的 瑞利（Rayleigh）信道的仿真 主要考虑不同条件下的仿真(Matlab-based mobile communications in the multipath fading channel simulation based multi-path transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation the main consideration of the simulation under different conditions)

基带条件下QPSK误码率仿真，具有很大参考价值(Under the conditions of the baseband QPSK BER simulation, has great reference value)