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Re: [Discuss-gnuradio] Frequency discriminator using a frequency to volt
From: |
madengr |
Subject: |
Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter |
Date: |
Thu, 5 Nov 2015 12:26:23 -0700 (MST) |
Could this be modified to, optionally, do the (complex) average after the
FFT. That would give a coherent average assuming no samples are dropped
prior to FFT. Nice for digging signals out of the noise compared to a
normal spectrum analyzer type average.
Lou
Marcus Müller-3 wrote
> Because I find that highly cool, here's what's happening inside the Qt
> frequency sink, even if that might be unrelated to your problem:
>
> * takes in a vector of N samples
> * Computes a discrete Fourier transform (using FFTw's fast fourier
> transform algorithms) of length N
> * computes the square of the magnitude, the logarithm of that,
> normalizes each of the N complex result values
> * optionally: averages each bin individually
> * regularly updates the plot with the N-vector of PSD
--
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- [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, larry ho, 2015/11/04
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Tim K, 2015/11/04
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Marcus Müller, 2015/11/05
- Message not available
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter,
madengr <=
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Marcus Müller, 2015/11/05
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, madengr, 2015/11/06
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Daniele Nicolodi, 2015/11/09
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Marcus Müller, 2015/11/09
- Re: [Discuss-gnuradio] Frequency discriminator using a frequency to voltage converter, Daniele Nicolodi, 2015/11/09