Learning-to-Program-with-MATLAB_-Building-GUI-Too

Spectral analysis of Gaussian pulses

1. 给一段原始的语音信号（可以是自己录制的一段语音），加上一频率为3.8kHz的高频余弦噪声和频率为3.6kHz的高频正弦噪声（幅度自己可以选择），用窗函数设计一滤波器（要求最小阻带衰减为50dB）对加噪后的语音信号进行滤波，画出滤波器的频率响应曲线，画出滤波前后的时域图和频谱图。 需要用到的函数： fir1 用窗函数设计FIR滤波器的函数 2. 用GUI设计一界面（如图1所示）完成如下功能： 1） 输入一语音信号，画出语音信号的时域图和频谱图； 2） 对语音信号加噪处理，画出加噪后的时域图和频谱图； 3） 给定滤波器的性能指标，采用几种不同的方法设计滤波器对加噪信后进行滤波，画出各滤波器的频率响应曲线，画出滤波后的时域图和频谱图。 (1. to some of the original speech signal (which can be a voice you record yourself), plus a cosine frequency of 3.8kHz frequency noise and frequency of 3.6kHz frequency sinusoidal noise (in the range that they can choose), with a window function to design a filter (requires a minimum stop band attenuation is 50dB) after adding noise to the speech signal is filtered, the filter frequency response curve to draw, draw diagrams and time-domain spectrum before and after filtering. Need to use the function: function fir1 with window function design FIR filter design 2. Using a GUI interface (Figure 1) complete the following functions: 1) an input speech signal, the speech signal in the time domain to draw graphs and spectrum 2) adding noise to the speech signal processing, draw diagrams and time-domain plus noise spectrum after 3) to set the filter performance, using several different methods designed to filter letter after adding noise filtering, draw the frequency response curve of each )

OFDM系统中信道估计基于LS改进算法--基于DFT的信道估计算法实现(LS channel estimation in OFDM system based on the improved algorithm based on DFT channel estimation algorithm )

minimum mean square estimator log spectral amplitude is an anhanced technique of the minimum mean square estimator developed by Ephraih and Malah in 1985.It is used for signal processing by improving the Signal to noise Ratio.

展现不同的绘图功能，同时展现不同帧率下的图形图像，给出绘图函数。(To show different graphics, different frame rates while showing graphic images, drawing functions are given.)

说明：  一个标准的粒子群优化算法程序，是用Matlab编程算例。(A standard PSO procedure is the use of Matlab programming examples.)

MATLAB下FFT变换实用2个例子，可以进行绘制fft波形及计算THD(The MATLAB FFT transform practical two examples can draw the fft waveforms and calculate THD)

非平稳时变分析工具箱。现代信号处理的重要工具。(Non-stationary time-dependent analysis toolbox. An important tool in modern signal processing.)

code to get optical flow using sum of robust differences method

说明：  三电平逆变器模型,基于空间矢量算法，信号源为恒定三相交流信号经旋转变化得到控制脉冲信号(three level invetrer model)