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" <[email protected]>: > 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 >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > 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. > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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