Codes

例4：在sinc(t)信号中叠加噪声，分析对应频谱 fs=100 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=2 时间窗大小 ( x=x+0.1*randn(1,N) x=awgn(x,-10, measured ) figure plot(t,x) title( 时域信号图 ) xlabel( t /s ) y=fft(x,N) figure if mod(N,2)~=0 N=N-1 end f=linspace(0,fs/2,N/2) plot(f,abs(y(1:N/2))*2/N) title( 叠加噪声的sinc(t)信号频谱 ) xlabel( f /Hz ) figure y0=y(1:N/2) P=y0.*conj(y0)/N P=10*log10(P) plot(f,P) title( 功率谱 ) xlabel( f /Hz ) )

二维与三维光子晶体的光子禁带仿真程序代码(Two-dimensional and three-dimensional photonic crystal photonic bandgap simulation code)

Matlab的GUI教程，教初学者快捷方便地学习GUI的使用编程方法。(Matlab GUI tutorials, teach beginners quick and convenient to learn the use of GUI programming method. )

关于MOPA结构光纤激光器的程序，介绍了MOPA光纤激光器的发展现状，了解国外先进水平(About MOPA MOPA structure of fiber laser program introduced the developing situation of fiber laser learn foreign advanced level )

实现物种功能的语音处理：倒谱、时域、频谱、语谱图以及功率谱，并加有详尽的注释。另外还可以保存图像，一倍后来研究！matlab ＧＵＩ编程(Voice processing functions to achieve species: cepstrum, time domain, frequency spectrum, spectrogram and power spectrum, and add detailed comments. It also can save the image, doubled and later research!)

基于MATLAB的语音识别描述，描述清楚，系统的描述了语音识别的方法，具有较高的参考价值。(Description and recognition based on MATLAB description is clear, the system described in speech recognition. The method has a high reference value. )

数字信号频域处理的matlab源程序，包括dct，butterworth，lowpass等(Frequency-domain digital signal processing matlab source, including dct, butterworth, lowpass, etc.)

基于Kumaresan和Tufts提出的music改进方法，以减小计算复杂度(Kumaresan and Tufts-based music made by improved method to reduce the computational complexity)

介绍matlab相关组件的功能，便于安装时能够正确选择(Introduction matlab function of related components, easy to install right choice)

基于最短时间的三次样条插值，可用于机械臂轨迹规划(Based on the shortest time three spline interpolation, it can be used for trajectory planning of manipulator.)