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高斯噪声的产生

[英]Gaussian noise generation

原文 2014-07-31 06:37:26 5 1 signal-processing/ gnu/ discrete-mathematics/ digital/ gnuradio

I want to generate Gaussian noise in GNU Radio companion.I have studied that by feeding a VCO with a saw tooth wave can do that.Can any body explain how the signal from the VCO will have a Gaussian distribution? 我想在GNU Radio伴侣中产生高斯噪声，我已经研究了通过给VCO馈入锯齿波可以做到这一点，任何人都可以解释VCO的信号将如何呈现高斯分布吗？ As i think it will have a uniform distribution because the frequency is first increased and the decreased and all the frequencies will have equal probability of occurrence. 我认为它将具有均匀的分布，因为首先增加和减少频率，并且所有频率都具有相同的发生概率。 Regards, Ali 问候，阿里

1 个解决方案

The easiest way would be to use the channel model blocks available in recent GNU Radio releases. 最简单的方法是使用最新GNU Radio版本中可用的通道模型块。 There's information on this page: http://gnuradio.org/doc/doxygen/page_channels.html 此页面上有信息： http : //gnuradio.org/doc/doxygen/page_channels.html

For simple Additive White Gaussian Noise (AWGN), simply set the noise voltage and ignore the other parameters (which are useful for emulating a more realistic channel, but are not related to your immediate question). 对于简单的加性高斯白噪声（AWGN），只需设置噪声电压并忽略其他参数（这对于模拟更逼真的通道很有用，但与您的紧迫问题无关）。 Bear in mind that you are adding noise, so the number you use for noise voltage is specifying the 'noise floor', as opposed to specifying eg the desired SNR. 请记住，您正在添加噪声，因此用于噪声电压的数字是指定“噪底”，而不是指定例如所需的SNR。