Re: [Discuss-gnuradio] Delay determination between Tx and Rx signal for limesdr mini with help of gnu radio.

[Md. Atiqur Rahman]

Also, should I use timing recovery and equalizer in the receiving side(as it would make more sense). 

My idea is transmitting the data and receiving it simultaneously without losing data. 

Thank you.

 

On Mon, Jul 15, 2019 at 5:40 PM Md. Atiqur Rahman <address@hidden> wrote:

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,

Atiqur

On 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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--

Sincerely,

Md Atiqur Rahman

Hochschule Bremen

--

Sincerely,

Md Atiqur Rahman

Hochschule Bremen