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Description: 数字信号处理的应用之一是从含有加性噪声的信号中去除噪声。现有被噪声污染的信号x[k]=s[k]+d[k],式中： 为原始信号d[k]为均匀分布的白噪声。
（1）分别产生50点的序列s[k]和白噪声序列d[k],将二者叠加生成x[k],并在同一张图上绘出x0[k],d[k]和x[k]的序列波形。
（2）均值滤波可以有效去除叠加在低频信号上的噪声。已知3点滑动平均数字滤波器的单位脉冲响应为h[k]=[1,1,1 k=0,1,2],计算y[k]=x[k]*h[k],在同一张图上绘出前50点y[k],s[k]和x[k]的波形，比较序列y[k]和s[k]。
-digital signal processing applications from one containing additive noise signal denoising. Existing noise pollution was a signal x [k] = s [k] d [k], where : of the original signal d [k] uniform distribution of white noise. (1) have 50 points each sequence s [k] and white noise sequence d [k] superposition of the two generation x [k] and the same is likely to draw a map x0 [k] d [k] and x [k] waveform sequence. (2) mean filter can effectively remove superimposed on the low-frequency noise on the signal. 3:00 known moving average digital filter unit for pulse response h [k] = [k = 0,1,2 1,1,1] Calculation y [k] = x [k]* h [k], the same is likely to draw a map before 50 y [k] s [k] and x [k] waveform sequence comparison y [k] s and [k].
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Author: 魏臻 |
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Description: fortran调用matlab的ppt简介，具体自己看，一个简单的例子-fortran calling matlab About the ppt, the specific own view, a simple example
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Author: Ize7gn |
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Description: DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求：
(1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。
-DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.
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Author: wyyy |
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Description: 分别采用维纳滤波和l-d算法设计一个6阶前向线性预测器，给出设计过程，matlab程序。
要求：1、得到预测器的权向量和预测误差功率
2、画出预测阶数和预测误差功率的曲线
3、在使用l-d算法时，假设 ， ，…… 未知
-Wiener filter and were used to design a 6-ld algorithm prior to the linear predictor order, given the design process, matlab program. Requirements: 1, are predictors of weight vectors and the prediction error power of 2, draw the prediction order and the prediction error power, Curve 3, in the use ld algorithms, assumptions, ... ... unknown
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Author: xiaosa |
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Description: Matlab绘制3-D图形的几个例子，很详细，也很全面的介绍了绘制3-D图形的函数，其中最后一个是画直方图的，横向和纵向都有例子。-Matlab 3-D graphics to draw a few examples of very detailed and very comprehensive introduction to drawing 3-D graphics functions, the last one is the histogram drawing, horizontal and vertical are examples.
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Author: 贾晓媛 |
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Description: 有限差分法实验报告
用Matlab中的有限差分法计算槽内电位；
对比解析法和数值法的异同点；
选取一点，绘制收敛曲线；
总的三维电位图-Finite difference method for the experiment report
Matlab finite difference method for calculating the slots in the potential
Comparative analytic method and numerical method the differences and similarities between
Select a bit, draw convergence curves
General 3 d potential figure
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Author: 小林 |
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Description: 自己写的matlab上GUI界面，可以读取行情软件导出的txt格式历史数据，并汇出k线和技术指标，可以通过GUI编辑设置、各种指标及其参数。主图附图指标编辑通过编写脚步实现，有例子。
解压后，将work下的dir.mat中的wkdir变量修改成与你放置的目录一致，也可以就将work放置在"d:/matlab/"下.
read2mat.m从文本中读取数据，并存在与文本文件同名的.mat格式的文件中。
运行kfigure,加载.mat格式文件就可以画出k线图和指标图。其他功能很多和股票软件差不多，大家自己试就行了。-Matlab GUI interface to write their own, you can read the historical data of market software exported txt format, and Export k lines and technical indicators, you can edit the settings through the GUI, various indicators and their parameters. The the main figure drawings indicators edit achieve by writing the footsteps examples. After decompression, modify the work under dir.mat wkdir variable and you are placed in the same directory, will work placed in the " d :/ matlab /" . Read2mat.m to read data from a text, and exist with a text file of the same name. mat format file. The run kfigure, loading mat format file can draw k chart and indicators Figure. Other features and stock software almost everyone own try line.
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Author: 熊伟 |
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Description: 设每位同学自己的学号为n，采用遗传算法求解下面优化问题：
min f(x1,x2)=(4-2.1*x1^2+(x1^4)/3)*x1^2+x1*x2+(-4+4*x2^2)*x2^2+n-20111369
s.t. -3<x1<3 -2<x2<2
函数 为六峰值驼背函数（Six-hump Camel Back Function），要求如下：
（i）mesh()为Matlab中常用的画图函数，请查阅相关书籍或help，掌握mesh用法，画出 的三维图像；
（ii）用遗传算法工具箱求解该优化问题，给出求解结果，画出每代群体的最优适应度、适应度均值图像。
（iii）尝试至少一种提高求解效果的方法，并简单比较、分析。
-Set each student their own student number for n, using the genetic algorithm for solving the following optimization problem:
Min (x1, x2) = f (4-2.1* x1 ^ 2+ (x1 ^ 4)/(3)* x1 ^ 2* x2+ x1+ x2 ^ (4+ 4* 2)* x2 ^ 2+ n- 20111369
S.t.- 3 < x1 < 3-2 "x2" 2
Functions for Six peak hunchback (Six- hump Camel Back Function), the requirements are as follows:
(I) mesh () as that is commonly used in Matlab drawing function, or help please refer to the relevant books, to master the use mesh, draw the 3 d image
(ii) using genetic algorithm toolbox to solve the optimization problem, is given as a result, to draw the best fitness of each generation group, the mean fitness images.
(iii) to try at least a way to improve the effect of solution, and a simple comparison and analysis.
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Author: 天溟 |
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Description: 用Matlab 绘制 3D 字的函数，很好用哦-The function of Matlab to draw 3 d word, very good oh
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Author: whj |
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Description: matlab 图形绘制功能，在直角坐标系或极坐标系下绘制二维和三维图形-Matlab graphics functions in the rectangular coordinate system or polar coordinates draw 2 d and 3 d graphics
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Author: 张焕宝 |
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Description: 在matlab环境下画球，已知球心坐标，半径，根据条件画球，对三维环境有帮助，-Draw the ball under the matlab, helpful to the 3 d environment
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Author: caolijie |
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Description: 利用MATLAB编程实现具有多种方向和频率选择性的Gabor滤波器，绘制一维、二维、三维空域和频域图形，讨论Gabor滤波器在方向和频率上的选择特性。-Using MATLAB programming with multiple direction and frequency selective Gabor filter, draw a d, 2 d, 3 d graphics, airspace and frequency domain to discuss Gabor filter on the choice of direction and frequency characteristics.
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Author: 段绍丽 |
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Description: matlab仿真程序
产生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；
对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50 ，波形采样率为符号率的8倍，画出前20个符
号对应的波形（同时给出前20位信源序列）
改用HDB3码，画出前20个符号对应的波形
改用密勒码，画出前20个符号对应的波形
分别对上述1000个符号的波形进行功率谱估计，画出功率谱
改变信源“0”的概率，观察AMI码的功率谱变化情况-Produce random binary sequence of length 100 The transmission carrier frequency is 10 times the bit rate, draw a sampling rate of 100 times the symbol rate of the BPSK modulation waveform (first 10 bits), its power spectrum Coherent demodulation of assuming the same as the phase of the transmitting and receiving frequencies, and draw the waveform x (t), assuming that the impulse response of the low pass filter 10 consecutive 1 (the remainder is 0), or 12 consecutive 1 (the remainder is 0), y (t) is drawn under the two filters respectively, and the decision output (10 bits) The received carrier frequency is 10.05 times the bit rate, the same initial phase, draw the waveform x (t), assuming that the impulse response of the low pass filter of 10 consecutive 1, shown under two filter y (t), and decision output (20 bits) DPSK and delay differential coherent demodulation, the carrier frequency is 10 times the bit rate, draw a, b, c, d point of the waveform (first 10 bits) DPSK and delay
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Author: 张亦弛 |
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Description: 用matlab绘制图像的简单程序，能显示二维图，各坐标轴的名称及各曲线的意义均能显示(附图)。-Matlab to draw the image of simple procedures, can show 2 d figure, the name of each coordinate axis and the significance of the curve can show.
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Author: 楚彭子 |
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Description: 此程序为用于主成分分析的matlab程序,可以输出贡献率及画出二维散点图-This program for principal component analysis of matlab, can output contribution rate and draw a 2 d scatter plot
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Author: catrdc |
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Description: This program for principal component analysis of matlab, can output contribution rate and draw a 2 d scatter plot
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Author: Ktngepa |
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Description: （1）录制一段语音信号，完成对信号的采样，画出信号的时域波形和频谱图，确定信号的频谱范围；
（2）给信号叠加噪声（噪声类型分为如下几种：a白噪声；b单频噪色（正弦干扰）；c多频噪声（多正弦干扰）；d其它干扰。），画出受噪声干扰的信号时域波形和频谱图；
（3）采用窗函数法设计FIR低通滤波器，画出滤波器的频响特性图；
（4）用所设计的滤波器对受噪声影响的信号进行滤波，画出滤波后语音信号的时域波形图和频谱图；
（5）对滤波前后的信号进行对比，分析信号的变化；回放语音信号，并与原始语音信号对比。((1) record a speech signal, complete the sampling of the signal, draw the time domain waveform and frequency spectrum of the signal, and determine the spectrum range of the signal;
(2) signal superposition noise (noise type is divided into the following: a white noise, B single frequency noise (sinusoidal interference); C multifrequency noise (multi sinusoidal interference); d other interference) Noise signal, time domain waveform and spectrogram are drawn;
(3) the FIR low-pass filter is designed by using the window function method, and the frequency response characteristic of the filter is drawn;
(4) the designed filter is used to filter the signal affected by the noise, and the time domain waveform and spectrogram of the filtered speech signal are drawn;
(5) compare the signals before and after filtering, analyze the change of the signal, replay the speech signal, and compare with the original speech signal)
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Author: 华
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Description: 此程序为用于主成分分析的matlab程序,可以输出贡献率及画出二维散点图(This program for principal component analysis of matlab, can output contribution rate and draw a 2 d scatter plot)
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Author: outibizqg
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Description: 基于ARM Cortex-M4F(TM4C123)单片机 【功能】“闪光灯”在相机的摄像头中有广泛的应用，不同产品的闪光灯特性有所区别，试编程控制光照强度传感器，采集并分析拍照时的闪光特性曲线
?提示与要求
?A/D 采集一次拍照的过程，要涵盖整个闪光的过程
?用定时器触发A/D 采样，采样率不低于1kHz
?将拍照的数据通过UART 送PC 机，用MATLAB 绘图附在报告中(Based on the ARM Cortex-M4F (TM4C123) single chip microcomputer, "flash" is widely used in the camera's camera, the characteristics of the flash lamp of different products are different. The test program controls the light intensity sensor to collect and analyze the flash characteristic curve of the photo.
Hints and requirements
(A/D) the process of collecting a photo to cover the whole process of flash.
Using timer to trigger A/D sampling, the sampling rate is not less than 1kHz
Take the photo data through UART to PC, draw with MATLAB and attach it to the report.)
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Author: Der_steppenwolf |
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Description: 考虑一长度为D，宽度为L的理想均匀面阵天线，并用Matlab画出其二维波束方向图。(Consider an ideal uniform planar array antenna with length D and width L, and draw its two-dimensional beam pattern with MATLAB.)
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Author: sxfylhc |
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