Description: 模拟单边带调幅及解调
基本要求：
产生300 ~ 3400Hz的调制信号，画出时域波形及频谱；
产生载波信号，频率自定义，画出时域波形及频谱；
产生加性高斯白噪声，画出时域波形及频谱；
单边调幅，画出叠加噪声后的调制信号和已调信号的波形及频谱；
设计滤波器，画出幅频响应图；
解调，画出解调后的信号时域波形及频谱，并对比分析。
-Simulation of single sideband amplitude modulation and demodulation basic requirements: 300 ~ 3400Hz generate the modulation signal, draw time-domain waveform and frequency spectrum generated carrier signal, the frequency of self-definition, draw time-domain waveform and frequency spectrum have a high additive Adams white noise, draw time-domain waveform and frequency spectrum unilateralism AM, draw superimposed noise signal and the modulation transfer signal waveform and spectrum design filters, amplitude-frequency response of draw demodulation, After demodulation of the signal to draw time-domain waveform and frequency spectrum, and comparative analysis. Platform: |
Size: 66560 |
Author:严雪峰 |
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Description: 使用Jakes所假设的模型，用来产生信道抽头延迟线模型中的抽头增益过程所需的多普勒频谱成形滤波器有多种实现方法。时域FIR滤波器是最常用的一种实现方法。-Assumed the use of Jakes model, used to generate the channel-tap-tap delay line model of the process gain the necessary Doppler spectrum shaping filter has a variety of implementations. Time domain FIR filter is an implementation of the most commonly used method. Platform: |
Size: 2048 |
Author:wengfh |
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Description: 利用Matlab生成GPS C/A 码的基带信号。
（1）产生卫星PRN 号码为“5”的一组C/A 码；
（2）循环生成25 页的导航数据，GPS 时间可填入一固定的已知数值；
（3）生成C/A 码扩频信号，每个C/A 码码片给出4 个采样数据；
（4）基带信号采用方波信号，电平为0 和1，占空比为50 ％，不加入噪声，进一步生成某个特定的中频信号。-Matlab generated using GPS C/A code base band signal. (1) generation of satellite PRN number is " 5" a set of C/A code (2) loop generates 25 of the navigation data, GPS time can fill a fixed known value (3) to generate C/A code spread spectrum signal, each C/A code chip gives the four sampling data (4) baseband signals using square wave signal, level 0 and 1, 50 duty cycle, not to join the noise generated further a specific frequency signal. Platform: |
Size: 45056 |
Author:李伟 |
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Description: 产生正交的AM信号和FM信号，信号为复信号，含有I路和Q路，FM信号可设置调制指数变量，运行后可看到仿真时域及其频谱图-Generate quadrature AM signal and FM signal, the signal for the complex signal containing I and Q Road Road, FM signal modulation index variable can be set to run after seeing the time-domain simulation and spectrum Platform: |
Size: 1024 |
Author:刘翔 |
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Description: This program can generate 3D surface and terrain from a video source by the image processing technique as well as from a random or fractal source. It is a good base for Remote Sensing, Remote Topography, Radars, GPS and regenerating Earth Terrains from a camera or spectrum analyzing by video sources and make a real 3D map by CNC machines. <<<<<>>>>> How to use: 1: Run the program and with 8, 9, 10, 11 radio buttons (below picture) see random real time noise. Freeze the scene with button number 22 and with another controls new results are ready. 2: Connect to a video source (for example a web cam) and then click at buttons number 18 or 19 and then click on 13 (Brightness) or 14 (Color) radio buttons and see 3d video. Compile: You need OpenGL library for Win32. Platform: |
Size: 228352 |
Author:Rahim |
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Description: 产生噪声调频干扰信号，并画出它的时域和功率谱-Generate noise FM jamming signal, and draw it in time domain and power spectrum Platform: |
Size: 1024 |
Author:吴沁 |
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Description: 根据伪随机序列理论，由混合同余法产生均匀分布的随机数，进而根据中心极限定理来产生高斯噪声。
分析所产生的均匀分布和高斯分布随机信号的均值、方差、自相关等数字特征，估计其概率密度函数并进行分析，估计其功率谱密度并进行分析。说明该高斯噪声是否符合白噪声特性。
对该高斯噪声进行FIR低通滤波，估计输出低通型限带白噪声的功率谱、相关时间等，并结合白噪声通过线性系统相关理论来进行分析。
-According to the theory of pseudo-random sequence, a uniformly distributed random numbers by mixed congruential method to generate Gaussian noise, and then according to the central limit theorem. Produce a uniform distribution of the analysis and the mean of the Gaussian distribution random signals, variance, since the digital characteristics of the correlation, the probability density function is estimated and analyzed, it is estimated that its power spectral density, and analyzed. The Gaussian noise is in line with the characteristics of white noise. FIR low pass filter of the Gaussian noise, the estimated output of low-pass type band-limited white noise power spectrum, time, etc., combined with the white noise to be analyzed by linear system theory. Platform: |
Size: 1024 |
Author:Lee |
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Description: 采用功率谱方式并用AR线性滤波方法生成脉动风速时程数据，能用于结构风载荷的计算。-Using power spectrum and AR linear filtering method to generate fluctuating wind speed time series data, can be used in structure wind load calculation. Platform: |
Size: 7168 |
Author:yanjian |
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Description: Computes the discrete fourier transform of a data set and creates a discrete frequency index vector. Generates a figure and plots data spectrum.Generates a low pas filter and multiplies with data spectrum. Generates a figure
and plots filtered data spectrum.Computes the filtered discrete time data set. Generates a figure and plots the filtered discrete time data set.Generates a high pass filter and multiplies the filter and data spectrum. Generate a figure
and plots the filtered data. Computes the filtered discrete time data set. Generates a figure and plots the filtered discrete time data set. Creates a discrete frequency index vector and simulates a data set. Generates a figure and plots the simulated data set. Create a bandpass filter by multiplying a low pass filter with a cosine function in the discrete time domain. Plots original and filtered data spectrum. Platform: |
Size: 1024 |
Author:sehmontine9 |
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Description: 研究了一种数字中频 GPS 信号生成方法。给出了数字中频信号数学模型，模型考虑了各种因素对信号的影响。通过导航电文分析，提出信号传播时延、多普勒频移以及信号入射方向的估计方法。给出了中频信号产生的流程，对其中时延的设置，信号的上变频、信号幅度设置以及方向信息的导入进行了阐述。对所生成的信号模型进行了仿真分析，给出了信号产生各个阶段的频谱，对所生成的信号进行了相关捕获。仿真结果表明频谱特征符合理论分析，能够被捕获并找出信号时延从而实现定位。证明该信号模型能作为信号源应用于 GPS接收机研制中。-】The paper discusses a digital IF GPS signal generation method, gives the mathematic
model of digital IF signal. This mathematic model takes into account the influence of various
factors. Based on analysis of the navigation data, the method to estimate signal propagation time,
Doppler frequency shift and the coming angle of signal is proposed. The flow to generate IF signal
is given, in which the setting of time delay, the up-frequency conversion, the setting of signal
magnitude and the introduction of direction information are expounded. The signal generation model
is simulated and analyzed, the spectrum of signal in each stage given, and the correlation capture
of the generated signal also done. Simulation indicates that the spectrum is in accord with
theoretical analysis the signal could be captured, thus find the time delay, accomplish the
orientation. The signal model is proved applicable in the research and development of GPS receiver. Platform: |
Size: 1149952 |
Author:luchan |
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Description: 生成一个一定参数的原信号，并附加一个符合均匀分布的随机噪声，分别画出该信号经过均匀采样的频谱图以及经过非均匀采样的频谱和时域图-Generate a certain parameter of the original signal, and attach a line with uniformly distributed random noise were drawn through uniform sampling of the signal spectrum as well as through non-uniform sampling of the spectrum and time domain Platform: |
Size: 1024 |
Author:lakuku |
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Description: 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 Platform: |
Size: 1024 |
Author:胡斌 |
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Description: 产生16路信号，画出16路原始信号的频谱叠加图以及滤波器响应，并画出结果信号的时域和频域波形-Generate 16-channel signal, draw 16 original signal spectrum overlay and a filter response, and draw result signals in time domain and frequency domain waveforms Platform: |
Size: 1024 |
Author:胡斌 |
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Description: 混沌的数值仿真主要包括MATLAB编程、SIMULINK模块构建、EWB仿真以及其他一些相关的软件仿真或数值计算等方法，从而获取混沌吸引子的相图、时域波形图、李氏指数、分叉图和功率谱等。混沌的硬件实验主要包括模拟/数字电路设计与硬件实验、现场可编程门阵列器件（FPGA）、数字信号处理器（DSP）等硬件实现方法来产生混沌信号。本节仅对各种数值仿真方法作简单介绍。-
Chaos numerical simulation including MATLAB programming, SIMULINK module build, EWB simulation and other related software simulation or numerical calculation methods, in order to gain chaotic attractor phase diagram, time-domain waveform, Lipschitz exponent, bifurcation diagrams and power spectrum. Chaos experiment hardware includes analog/digital circuit design and hardware experiments, field-programmable gate array device (FPGA), digital signal processor (DSP) hardware implementation to generate chaotic signals. This section is only a variety of numerical simulation methods for a brief introduction. Platform: |
Size: 154624 |
Author:闵国旗 |
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Description: 利用Matlab生成GPS C/A 码的基带信号。
（1）产生卫星PRN 号码为“5”的一组C/A 码；
（2）循环生成25 页的导航数据，GPS 时间可填入一固定的已知数值；
（3）生成C/A 码扩频信号，每个C/A 码码片给出4 个采样数据；
（4）基带信号采用方波信号，电平为0 和1，占空比为50 ％，
不加入噪声，进一步生成某个特定的中频信号-The baseband signal is generated using Matlab GPS C/A code. (1) generate satellite PRN number " 5" is a set of C/A code (2) loop generates 25 navigation data, GPS time can be filled with a fixed known value (3) generated C/A code spread spectrum signals, each C/A code chip sample data is given 4 (4) a baseband signal using a square wave signal with a level of 0 and a duty cycle of 50 , the noise was not added, and further generates a a specific frequency signal Platform: |
Size: 175104 |
Author:陈伟 |
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Description: 单片机产生音乐源码及上频谱转码工具。
单片机通过控制引脚的高低电平来产生频率，接着再控制输出频率时间就可产生美妙的音乐。-SCM source code and produce music spectrum transcoding tool.
Microcontroller to generate a frequency by controlling the pin high and low, and then again to control the output frequency of time can produce beautiful music. Platform: |
Size: 610304 |
Author:建立 |
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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 to generate sine wave, square wave, and the white noise signal and displays each time-domain waveform 2. FFT transform, display each spectrum, where the sampling rate, frequency, data length optional 3. RMS to make maps of the three signals, power spectrum, as well as the number of rms Atlas 4. Restored by inverse Fourier transform IFFT signal and displays the time domain waveforms sinusoidal signal recovery Platform: |
Size: 1024 |
Author:临风独立 |
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Description: 1、用Matlab产生正弦波，矩形波，并显示各自的时域波形图；
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，要求注明；
3、绘制三种信号的均方根图谱；
4、用IFFT回复信号，并显示恢复的正弦信号时域波形图。
-1, using Matlab to generate sine wave, square wave, and shows the respective time-domain waveform
2, FFT transform, display each spectrum, where the sampling rate, frequency, length of data demand, requirements specified
3, three maps drawn rms signal
4, the reply signal by IFFT, the sinusoidal signal and displays the recovered time-domain waveform. Platform: |
Size: 79872 |
Author:谢明 |
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Description: 可以修改功率谱公式，生成任意一种轨道不平顺时域分析图(The power spectrum formula can be modified to generate an arbitrary track irregularity time domain analysis diagram) Platform: |
Size: 2701312 |
Author:日木天子
|
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Search - generate time spectrum