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From: | Md. Atiqur Rahman |
Subject: | Re: [Discuss-gnuradio] Delay determination between Tx and Rx signal for limesdr mini with help of gnu radio. |
Date: | Mon, 15 Jul 2019 17:45:41 +0200 |
Dear Marcus,Thank you for your quick reply.Actually, I am very much new in GRC. The GRC is running without giving me any error though. If I use 32KS/s, it stopped working by saying python stop working. Therefore, I am giving 64KS/s.I am following the grc-tutorial, hence that modulation scheme contains equalizer and timing recovery on the transmit side. Shouldn't I use it? please correct me if I am wrong.Sincerely,AtiqurOn Mon, Jul 15, 2019 at 5:05 PM Müller, Marcus (CEL) <address@hidden> wrote:Oh, and why are you doing an equalizer and a timing recovery on the
*transmit* side!?
On Mon, 2019-07-15 at 15:04 +0000, Müller, Marcus (CEL) wrote:
> Also, without knowing, I'm almost certain that 64kS/s is not a possible
> sampling rate for the device. You really might want to read the console
> output very closely!
> On Mon, 2019-07-15 at 14:56 +0000, Müller, Marcus (CEL) wrote:
> > So, first of all:
> >
> > never use "Throttle" in a flow graph with hardware.
> > In fact, GRC will *scream* at you that you shouldn't be doing that!
> >
> > Then: I can't claim to have any knowledge of the limeSDR driver, but
> > unless that driver specifically allows you to start the TX and RX
> > streaming at the exact same instance: That delay is not a deterministic
> > value.
> >
> > Best regards,
> > Marcus
> >
> > On Mon, 2019-07-15 at 16:46 +0200, Md. Atiqur Rahman wrote:
> > > Hello Guys, I am having trouble to find the proper delay point between Rx and Tx signal while running the qpsk modulation scheme on gnu radio to my Limesdr mini board. While I am running the program through limesdr, I realize that it has a greater delay between (as expected). However, until now I am unable to find the proper amount of delay. I am changing the range of the delay from gui range(int type) to find the delay which will give me the synchronized Rx and Tx so that I could ensure that there is no missing data at the receiver side.
> > >
> > > I attach the file here in this email. Hope anybody would like to help. Thanks in advance.
> > >
> > > Sincerely,
> > > Atiqur
> > >
> > > _______________________________________________
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> >
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>
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--Sincerely,Md Atiqur RahmanHochschule Bremen
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