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Re: [Discuss-gnuradio] Fundamental question on Sampling rate
From: |
CEL |
Subject: |
Re: [Discuss-gnuradio] Fundamental question on Sampling rate |
Date: |
Fri, 27 Apr 2018 13:44:58 +0000 |
Hi Mehtap
On Fri, 2018-04-27 at 15:57 +0300, mehtap özkan wrote:
> Based on your calculations, I have decided to get a LIMESDR-PCIe.
> The sampling rate will be 122,88 MSPS which will give 61.44 MHz I and 61.44
> MHz Q.
I think it is the other way around: The Sampling rates are 61.44 MHz on
I and Q simultaneously. The 122,88 MS/s is just a cumulative rate.
> That will be enough to demodulate a 50 MHz wide QPSK modulated signal.
Probably!
> I am not sure if I can decimate the 122,88 MSPS by 2 and still being able to
> correctly demodulate the signal.
No, you can't. See the sampling theorem.
Best regards,
Marcus
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