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Abstract：Noise frequency modulation(FM)jamming。which belongs to blanket jamming。is already become
the main form ofnoise jamming at present。because the wideband was gained by it．Tne spectnlnl ofnoise FM
jamming is analyzed by time domain autocorre
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基于matlab，针对调幅AM、调频FM和调相PM信号，分析在不同的噪声环境，包括高斯白噪声、色噪声、非高斯噪声及正弦干扰中，各种信号的二阶循环谱。可根据需要改变程序中信号或噪声环境，分析结果。,Based on matlab, AM for AM, FM FM and PM phase modulation signals, analysis of noise in different environments, including Gaussian white noise, colored
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FM 的仿真程序，同时加有噪声，还可以看仿真图像，通过修改可以进行相位调制仿真，-FM of the simulation program, plus there is noise at the same time, you can see simulation images, can be carried out by modifying the phase modulation simulation,
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The file calculates and plots FM noise sidebands for a carrier. It also does sinusoidal modulation. This simple way of adding noise to a carrier is useful for simulation of PLLs. It turns out, though, that the mean of the randn function is not as clo
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以前常有的调制识别程序大多是基于MATLAB的，本程序是基于C语言的实用程序，可以识别AM、FM、DSB、LSB、USB、CW、Noise等模拟调制信号的调制类型，是在实际工程中正在应用的实用程序！-Previous common modulation identification procedures are mostly based on MATLAB, and this program is based on the C language utility can identify the
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matlab编写的常见调制模式(am,fm,bpsk,qpsk,mask,16qam等)自动识别动态链接库，可以直接被vc调用，信噪比为>=10dB,-matlab write common modulation (am, fm, bpsk, qpsk, mask, 16qam, etc.) automatically identify dynamic link library, you can directly vc called signal to noise ratio> =
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灵巧噪声干扰,可针对脉冲压缩雷达和PD雷达,具体干扰样式有:三角波调频干扰信号 锯齿波调频干扰信号 马鞍型噪声干扰信号 噪声调相干扰信号 噪声调频干扰信号.-Smart noise interference may be directed to pulse compression radar and PD radar, specifically jamming style are: triangle-wave frequency modulation interference signal s
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Example of AM and FM Modulation with noise
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基于maltab的fm调制系统的设计
含有各种信噪比的调制-The fm modulation system based on maltab design contains a variety of signal to noise ratio of the modulation
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The file calculates and plots FM noise sidebands for a carrier. It also does sinusoidal modulation. This simple way of adding noise to a carrier is useful for simulation of PLLs. It turns out, though, that the mean of the randn function is not as clo
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调频电路的matlab simulink 仿真-The objectives of this laboratory are:
To investigate frequency modulation characteristics in the frequency domain.
To implement a classical double-tuned FM demodulator and measure its characteristics.
To implement a mod
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各种干扰信号,包括噪声调频干扰,噪声调相干扰,噪声调幅干扰,射频噪声干扰-A variety of interfering signals, including noise FM interference, noise, phase modulation, interference, noise AM interference, RF noise
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根据干扰信号波形样式的不同，压制性干扰可分为噪声调幅干扰、噪声调频干扰、噪声调相干扰。就是用噪声或类似噪声的干扰信号遮盖或淹没有用信号，阻止雷达检测目标信息。它的基本原理是：任何一部雷达都有外部噪声和内部噪声，雷达对目标的检测是在这些噪声中进行的，其检测又是基于一定的概率准则的。一般来说，如果目标信号能量S与噪声能量N相比（信噪比S/N），超过检测门限D，则可以保证一定的虚警概率Pfa的条件下达到可检测目标回波所要求的检测概率Pd，简称为可发现目标，否则便称为不可发现目标。-Blanket Ja
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仿真FM系统的调制解调全过程，有相干解调，非相干解调，包括大小信噪比的分析，十分完整~包含程序以及仿真结果。都是自己完成的，还有写程序中的一些问题和心得，希望对大家有帮助-The whole process of simulation FM system modulation and demodulation, coherent demodulation, non-coherent demodulation analysis, including the size of the signal-t
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噪声干扰信号的Matlab仿真
噪声调幅、调频、调相信号的Matlab仿真-Matlab simulation noise signal noise AM, FM, phase modulation signal Matlab simulation
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包括相位编码（含二相BPSK和四相QPSK）、线性调频LFM、非线性调频NLFM、脉冲幅度调制(PAM)信号、带噪FSK频率编码信号等的信号源码，是很好的产生各种雷达信号的程序资源。-Including the phase encoding (including two-phase four-phase BPSK and QPSK), LFM LFM, non-linear FM NLFM, pulse amplitude modulation (PAM) signal with noise s
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fm调制信号在不同噪声情况下的解调信号分析-fm modulation signal in the case of different noise signal is demodulated
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该程序为遮盖性干扰中的噪声调频干扰、噪声调相干扰、噪声调幅干扰等实验仿真(The program is simulated by noise, FM jamming, noise phase modulation jamming, noise amplitude modulation jamming and so on.)
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An important feature of FM and PM is that they can provide much better protection to the message against the channel noise as compared to the linear (amplitude) modulation schemes. Also, because of their constant amplitude nature, they can withstand
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产生一个高斯白噪声
利用MATLAB自带的fir1函数产生一个低通滤波器，限制高斯白噪声的带宽，由此产生了视频噪声。
利用产生的视频噪声，分别代入噪声调幅干扰的时域表达式，并且进行100次的积累后求平均值，对其进行快速傅里叶变换后，由此画出噪声调幅干扰的频域波形。
重复上述步骤，分别代入噪声调频干扰与噪声调相干扰的时域表达式，分别画出其频域波形与时域波形。(Generate a Gauss white noise
The fir1 function of MATLAB is used to ge
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