Description: 用来产生嵌入到随机噪声内的正弦波算法的C源程序。-used to produce embedded into random noise sine wave within the algorithm in C source code. Platform: |
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Author:minytian |
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Description: 用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图
-Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Make the rms signal of the three maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform Platform: |
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Author:river |
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Description: fft1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图-fft1. Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Make the rms signal of the three maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform Platform: |
Size: 1024 |
Author:李三 |
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Description: 1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图
-1. Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Made of the three signals in root-mean-square maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform Platform: |
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Author:白杨 |
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Description: 本设计基于数字频率合成技术,采用正弦查找表实现波形产生.直接数字频率合成技术（DDS）是一种先进的电路结构，能在全数字下对输出信号频率进行精确而快速的控制，DDS技术还在解决输出信号频率增量选择方面具有很好的应用，DDS所产生的信号具有频率分辨率高、频率切换速度快、频率切换时相位连续、输出相位噪声低和可以产生任意波形等诸多优点。
文中介绍了DDS的基本原理，对DDS的质谱及其散杂抑制进行了分析。程序设计采用超高速硬件描述语言VHDL描述DDS,在此基础上设计了正弦波、三角波、方波等信号发生器，。完成了软件和硬件的设计，以及实验样机的部分调试。
-The design is based on a digital frequency synthesis technology, to achieve wave synthesis by sine wave look-up tables. Direct Digital Synthesis Technology (DDS) is an advanced circuit structure, the output signal frequency is controlled precisely and rapidly in all-digital process, DDS technology has been applied in output signal frequency increment. DDS signals generated own high frequency resolution, frequency switching speed and continuous phase when frequency switching, low-output phase noise and can generate arbitrary waveform, and so on.
Basic principles of the DDS is introduced in the paper, frequency form and stray inhabitation of the DDS is analyzed. Procedures designed with high-speed hardware description language VHDL describe DDS, and design a sine wave, triangle wave, square-wave signal generator by it.The hardware and software has been designed, prototype and circuit has been tested partly.
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Author:蓝 |
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Description: 一个LMS自适应信号增强。输入信号是一个正弦
波将白噪声。
详细介绍了程序源代码-An LMS adaptive signal enhancement. The input signal is a sine wave with added white noise. The detailed description is in the program source code Platform: |
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Author:jack |
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Description: 产生一个随机信号和两个不同频率但频率间隔很小的正弦信号，要求对两信号之和进行如下分析：
（1） 求该随机信号的自相关性系数、自相关函数，画出对应的图形；
（2） 利用不同的参数建模方法求出两个随机信号的功率谱；
（3） 利用极大似然估计、递推最小二乘法等常用的参数估计方法估计所建模型，包括AR模型、MA模型和ARMA模型的的参数，阶次自定；并与Matlab工具箱里的一些建模函数的运算结果进行比较；
（4） 利用陷波滤波和MUSIC滤波方法对该信号的频谱进行估计；
（5） 利用Wiener滤波、LMS滤波对该含噪声的正弦信号进行去噪声处理；
（6） 假设该信号是一个飞行器的某个方向的线位移信号，可否利用Kalman滤波对该信号进行滤波？
（7） 利用高阶谱理论对该信号进行谱估计和相应的AR模型、MA模型和ARMA模型估计；
（8） 利用小波变换（变换函数可以直接用Matlab里的函数）对该信号进行去噪声处理，并和前面的去噪声方法进行比较。
-Produce a random signal and two different frequency but frequency interval small sine signals, required to make the following analysis of two signals:
(1) for the random signal from the correlation coefficients, the autocorrelation function and draw the corresponding graphics
(2) make use of different parameters modeling method for out two random signal power spectrum
(3) using maximum likelihood estimation, recursive least square method and common parameters estimation method estimates that the model, including AR model, MA model and the parameters of the ARMA model we, order time decided oneself With Matlab toolbox and some of the modeling function is used compared the
(4) use trapped wave filter and MUSIC of the signal filter method of spectrum to estimate
(5) use Wiener filtering, LMS filtering on the sinusoidal signal with noise to noise treatment
(6) assumes the signal is a vehicle of a certain direction of displacement signal line, can you use Kalman filtering on the Platform: |
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Author:李思青 |
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Description: 信号时正弦波加正态零均值白噪声，信噪比10db，信号频率2kHZ，采样频率100kHZ，数据长度N=256。
(1). 用周期图法进行谱估计。-Sine wave signal plus zero-mean normal white noise, SNR 10db, frequency 2kHZ, sampling frequency 100kHZ, data length N = 256.
(1) with the periodogram spectral estimation. Platform: |
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Author:郭子子 |
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Description: Simulink是MATLAB最重要的组件之一，它提供一个动态系统建模、仿真和综合分析的集成环境。在该环境中，无需大量书写程序，而只需要通过简单直观的鼠标操作，就可构造出复杂的系统。Simulink具有适应面广、结构和流程清晰及仿真精细、贴近实际、效率高、灵活等优点，并基于以上优点Simulink已被广泛应用于控制理论和数字信号处理的复杂仿真和设计。同时有大量的第三方软件和硬件可应用于或被要求应用于Simulink。-Abstract: In the development of communication technology, communication system simulation technology is a technical focus. This paper will focus on simulation of communication systems in the modem system and the basic principles of anti-noise performance and MATLAB simulation software platform to achieve some common analog modulation. The most important of the most commonly used analog modulation is the sine wave as a carrier perspective modulation and amplitude modulation. Common AM (AM), with bilateral (DSB), residual sideband (VSB) and single sideband (SSB) modulation, Platform: |
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Author:y c |
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Description: 1、分别生成两种信号（正弦波、方波、三角波、锯齿波、Sinc波形等）+噪声（高斯随机噪声、均匀噪声）
要求：频率：学号*100；
幅度：学号/10
相位：学号*pi/180
点数：学号*64
2、同时在一个图形中进行显示：
要求：标注X轴、Y轴、题目、颜色、样式、线型标注等。
3、进行信号分析及结果显示（对结果也要图形标注，同2）
要求：相关分析
卷积运算
求和运算
频谱分析（最大值、测频）
4、对上述原信号及信号分析结果分别存成EXCEL文件、文本文件和二进制文件，命名为名字+班级+学号+后缀-1, respectively, to generate two signals (sine wave, square wave, triangle wave, sawtooth wave, Sinc waveform, etc.)+ noise (Gaussian random noise, uniform noise) requirements: Frequency: No.* 100 margin: Student ID/10 phase: learning* pi/180 Points: No.* 642, in a graphical display: Requirements: X-axis label, Y axis, the title, color, style, linear marked. 3, signal analysis and results display (graphical results also marked with 2) requirements: analysis convolution summation spectrum analysis (maximum frequency measurement) 4, the original signal and the signal analysis results were kept into EXCEL files, text files and binary files, named for Name the+ class++ suffix number Platform: |
Size: 1024 |
Author:吉王飞 |
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Description: 白噪声中单个正弦信号的频率检测与估计
产生，其中是一高斯白噪声，其均值为0，方差为1。用MUSIC方法估计观测数据中正弦波的频率，并给出白噪声方差()un2uσ 与复正弦波的振幅A的估计值。-A single frequency detection and estimation of the sinusoidal signal in white noise, which is a Gaussian white noise with mean 0 and variance 1. MUSIC method to estimate the frequency of sine wave in the observation data, and gives the white noise variance () estimated value of the the un2uσ complex sine wave amplitude A. Platform: |
Size: 1024 |
Author:zee |
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Description: 线性调频信号是典型的脉冲压缩信号，在雷达波形设计中要重要的作用。本实例给出了调频雷达中混入正弦波噪声和高斯噪声时如何抑制噪声从而恢复调频信号的过程-LFM signal is a typical pulse compression signal, the radar waveform design to an important role. This example shows the sine wave frequency modulated radar mixed with noise and Gaussian noise, how to suppress the noise FM signal to the process of recovery Platform: |
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Author:周严 |
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Description: 1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图- 1. Using Matlab generated sine wave, square wave, and the white noise signal, and displays the respective time-domain waveform 2. The FFT transform, showing each spectrum, where the sampling rate, frequency, data length choice 3. Rms signal to make the three maps, power spectra, as well as the number of rms spectra 4. With the inverse Fourier transform IFFT restore the signal and displays the recovered time-domain waveform sinusoidal signal Platform: |
Size: 1024 |
Author:李杰 |
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Description: 1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图-1. Produce sine wave, square wave, and the white noise signal with Matlab, and their time-domain waveform display
2. FFT transform, display each spectrum, where the sampling rate, frequency, length optional data
3. RMS to make maps of the three signals, power spectrum, as well as the number of RMS map
4. Restored by inverse Fourier transform IFFT signal and displays the time domain waveforms sinusoidal signal recovery Platform: |
Size: 1024 |
Author:刘真 |
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Description: 用频率300HZ正弦波调制频率30KHZ的正弦波，采用同步解调，观察调制信号、已调信号、解调信号的波形、频谱以及解调器输入输出信噪比的关系。-300HZ frequency sine wave with a sine wave modulation frequency 30KHZ, using synchronous demodulation, the modulated signal was observed, modulated signal, the waveform of the demodulated signal, and the spectral output of the demodulator input signal to noise ratio relationship. Platform: |
Size: 1024 |
Author:陈扬东 |
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Description: 用LabVIEW编制一个完整应用软件，完成以下功能：
1、产生一个正弦波，叠加一个噪声信号，从界面上可以调整噪声和信号的幅度、频率等参数，此信号作为后续分析的信号源；
2、显示信号的时域波形，点击按钮可以显示信号的幅度谱、功率谱
3、图形上可以显示光标，具有峰值跟踪功能，同时将峰值频率、幅度显示在界面上。
4、点击按钮可以计算显示信号的失真度（THD）、信噪比（SNR）、各次谐波的频率和幅度；-Preparation of a complete application using LabVIEW software, perform the following functions: 1, generates a sine wave, the superposition of a noise signal, the interface can be adjusted from the noise and the signal amplitude, frequency and other parameters, this signal as a follow-up analysis of the signal source 2. time-domain signal waveform display, click the button to display the signal amplitude spectrum, power spectrum 3, you can display a cursor on the graph, with a peak tracking, while the peak frequency, amplitude displayed on the screen. 4, click the button to display the calculated distortion (THD) signal to noise ratio (SNR), each harmonic frequency and amplitude Platform: |
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Author:刘威 |
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Description: 使用低通滤波器从含有噪声的信号中提取有用的正弦波
(见实验指导书 实验九 数字滤波器中的第一题)
目的：用数字滤波器从含有高频噪声的采样数据中提取正弦信号。
要求：①输入信号为一正弦波，并加入一个白噪声的干扰来模拟信号传输中的随机干扰信号（用以模拟含有噪声采样序列）。
（模拟含有噪声采样序列具体可用正弦波信号叠加高频噪声来实现，为了使滤波效果明显，本实验的高频噪声是用高频均匀分布白噪声（Uniform）通过Butterworth高通滤波器过滤生成的，高通滤波器的截止频率设为10倍输入信号频率。）
②在程序中设计一个低通巴特沃斯滤波器，以滤除信号中的噪声分量，提取输入的正弦波信号 。
③可调节信号滤波器的截止频率和阶数，可显示滤波前与滤波后的时域信号。
④给出滤波前与滤波后的频谱特性的显示。
-Using low pass filter extracting useful sine wave signal containing noise(see experiment instruction digital filter in the first nine questions)Objective: to use digital filter sampling data extract containing high frequency noise sine signal.Requirements: (1) the input signal is a sine wave, and add a white noise interference to simulate the random disturbance signal of the signal transmission (to simulate contains noise sampling sequence).(simulated the sampling sequence contains noise available sine wave signal superposition of high frequency noise, in order to make the filtering effect is obvious, the experiment of high frequency noise is Uniform distribution with high frequency white noise (Uniform) by Butterworth high-pass filter to filter generated, high-pass filter cutoff frequency set to 10 times the size of the input signal frequency.)(2) in the program design a low-pass butterworth filter, in order to filter out the noise in the signal component, extract the input sine wav Platform: |
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Author:xy |
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Description: LabWindows_CVI作为一个用于建立自动测试系统的理想软件开发系统，提供了大量用于信号分析处理的函数，满足工程人员的需要。
信号产生实例工程“signal generation.prj”，LabWindows_CVI产生冲击信号、脉冲信号、斜坡信号、正旋信号、噪声信号、三角波信号等，在Graph控件中显示波形。
信号时域分析工程“timedomainanalysis.prj”，介绍了LabWindows_CVI信号的叠加、相关分析及卷积三种常用时域信号处理方式，将处理结果在Graph控件中显示。
信号频域分析工程“frequencydomainanalysis.prj”，介绍了LabWindows_CVI时域信号源FFT变换，可选用不同的加窗方式处理信号源，并利用FFT反变换得到原始信号，结果在。
信号滤波工程“filter.prj”，介绍了利用LabWindows_CVI信号处理函数构建巴特沃斯滤波器，利用信号处理函数构造不同阶次的低通、高通、带通、带阻滤波，结果在Graph控件中显示。-LabWindows_CVI as an ideal software development system for the establishment of an automatic test system provides a large number of functions for signal analysis and processing, to meet the needs of the project staff.
Signal generation example project signal generation.prj , LabWindows_CVI an impact signal, the pulse signal, the ramp signal, sine signal, noise signal, a triangular wave signals, waveform display in Graph control.
Signal time domain analysis project timedomainanalysis.prj , describes the superposition, correlation analysis and time domain convolution of three commonly used signal processing LabWindows_CVI signal, the results will be displayed in Graph control.
Frequency Domain Analysis of Engineering frequencydomainanalysis.prj , describes the time-domain signal source LabWindows_CVI FFT transform, can choose different way to deal with the windowed signal source, and use inverse FFT transform the original signal, resulting in.
Signal filtering project filter.prj Platform: |
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Author:WangJ |
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Description: 声卡示波器，labview，世界上最好的，来自德国-Author: Christian Zeitnitz
Main features:
The PC based Soundcard Oscilloscope receives its data the Soundcard with 44.1kHz and 16 Bit resolution. The data source can be selected in the Windows mixer (Microphone, Line-In or Wave). The frequency range depends on the sound card, but 20-20000Hz should be possible with all modern cards. The low frequency end is limited by the AC coupling of the line-in signal. Be aware, that most microphone inputs are only mono.
The oscilloscope contains in addition a signal generator for 2 channels for sine, square, triangular, sawtooth wave forms and different noise spectra in the frequency range 0 to 20kHz. The signal can be defined by a mathematical formula as well. The signals are available at the speaker output of the sound card. These can be fed back to the oscillocope in order to generate Lissajous figures in the x-y mode.
Download the latest version: scope V1.46
Obtain a commercial license here
Interested in a customized version Platform: |
Size: 29992960 |
Author:haroldharold |
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Description: matlab用设计一个信号发生器,并同时画出信号的时域表示，自相关函数及功率谱。白噪声,单位冲激信号,正弦信号,方波信号,三角波信号-matlab design with a signal generator, and at the same time draw time-domain signal representation, the autocorrelation function and power spectrum. White noise, unit impulse signal, sine signal, square wave signal, triangular wave signal Platform: |
Size: 70656 |
Author:想阿 |
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Search - sine wave with noise