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Re: How to display a part of the GRC spectrum?
From: |
Marcus Müller |
Subject: |
Re: How to display a part of the GRC spectrum? |
Date: |
Fri, 3 Feb 2023 17:09:23 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 |
First of all, that's a high sampling rate!
You would want to shift the signal (e.g using the "Rotator" block, or
just by using a signal source at the shift frequency and a (conjugate)
multiplication), then decimate it by a factor of 3 GHz / 8 MHz = 375.
From a point of view of designing the decimator, decimation by 375 is
quite a mouthful - it requires a filter transition width of
significantly less than 1/375 of the input Nyquist rate. So, it would
seem advisable to do this decimation in a cascade of decimators – in the
extreme case, decimation by 3, by 5, by 5, by 5.
Best regards,
Marcus
On 2/3/23 16:52, George Edwards wrote:
Dear GNURadio Community,
Let's say I build a GRC flowgraph operating at a sample rate of 3 GHz
and wish to display the spectrum over the fixed range of 1GHz +/-
4MHz, how do I get the QT GUI Frequency sink to plot over this range?
Thank you!
George
Re: How to display a part of the GRC spectrum?,
Marcus Müller <=