Re: [Discuss-gnuradio] RA:FFT

[Simon Olvhammar]

Ok, thanks.
So it removes fft frames at the output, then frames are lost? What am I missing?
A more concrete question, does e.g. a 10 min measurement contain the same fft data with no respectively with decimation?

Could you explain more in detail how input/output fft frame flow look like, with say decimation at 100?

Den 29 dec 2015 19:31 skrev "Marcus D. Leech" <address@hidden>:

On 12/29/2015 01:01 PM, Simon Olvhammar wrote:

Hi,

I have a question regarding the block RA:FFT in the RA Blocks package.
If I set, for example, the decimation at 100 does this mean that only 1 in 100 items will be kept?
In that case it would occur to me if, I do say a measurement of 100 minutes at a signal, I only get 1 minute of data?

Best regards
Simon

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No, the decimation is applied to FFT *output* frames, after integration.   It is typically the case that in radio astronomy spectrometry
  that you integrate spectra over some time period, since the SNR is typically quite poor.



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