tongjifft

频谱分析和滤波器设计 ppt文件 MATLAB表述的信号和系统， 用MATLAB与信号流图求系统 频谱分析 离散频谱与连续频谱的转换(Spectrum analysis and filter design ppt file MATLAB expression signals and systems using MATLAB and signal flow diagram for the system spectral analysis of discrete spectrum and continuous spectrum conversion)

DES3200实验系统的模拟信号输出通道产生一个1KHz 的方波,然后利用信号输入通道对产生的方进行低通滤波,得到一个1KHz 的正弦信号，并使用CCS 的图形显示工具显示输入和输出的波形。这里我们使用的是一个46阶的对称结构的FIR低通滤波器，其采样频率Fs为25KHZ，通带截止频率 1KHZ，阻带截止频率为3KHZ，阻带衰减为-60dB。(DES3200 experimental system analog output channel generates a 1KHz square wave, and then use the signal input channels that produce low-pass filtering the square to get a 1KHz sinusoidal signal, and use the CCS' s graphical display tool shows the input and output waveforms. Here we use a symmetrical structure of 46-order FIR low-pass filter, the sampling frequency Fs to 25KHZ, passband cutoff frequency 1KHZ, stopband cutoff frequency 3KHZ, stop-band attenuation is-60dB.)

Program to simulate Rayleigh fading using a p-th order autoregressive model AR(p) according to ％ Baddour s work: "Autoregressive modeling for fading channel simulation"(Program to simulate using Rayleigh fading a p-th order autoregressive model AR (p) accord % ing to Baddour's work : "autoregressive modeling for fading channel's imulation ")

1、 生成多周期线性调频信号，并对其进行频谱分析； 2、 对仿真生成的信号利用两种窗口函数进行STFT变换生成时频分析图(1, to generate multi-cycle chirp signal, and its spectrum analysis 2, the signal generated by the simulation window function using two STFT transform to generate time-frequency analysis chart)

说明：  这是一个用MATLAB写的db4小波程序，有主程序等(this is a function file write in matlab,embrace a main function )

使用matlab来仿真，是卫星导航电文调制，扩频后，产生.mat文件(Matlab simulation satellite navigation message modulation, spreading generate. Mat file)

说明：  MATLAB及在电子信息课程中的应用例题索引与程序(MATLAB and electronic information in the application of the curriculum and procedures of Example Index)

在这里设计的是时分复用系统，就是要将三路8比特数据复用到同一信道上进行传输(Here is the design of time division multiplexing system, is to take the road three 8 bit data multiplexed onto the same channel for transmission)

对光场相机成像过程及空间域重对焦的仿真，来自MIT,输入图像即可得到光场图像，改变聚焦参数可得到不同对焦平面上的图像(Light field image processing and refocusing)

一天征服傅里叶变换，对傅里叶变换做了浅显易懂的分析，对学习数字信号处理有帮助。(One day conquer the Fourier transform, made accessible for the Fourier transform analysis, is helpful to study digital signal processing.)