I used Ettus USRP B210.
I had this issue, no matter what modulation schemes I was implementing.
What I noticed was the fact that if the signal power drops below a value, the
whole receiver stopped and even the constellation was not updating.
I think the receiver block diagrams couldn’t recover
the job.
Loop Bandwidth is the famous constant of 2*pi/100.
I use these values and the flowgraph seems to be fine. I hope they do the same
for you.
Cheers.
Sent from Mail for Windows 10
From: Brian
Sent: 04 July 2017 19:12
To: Mojtaba Mansour Abadi
Subject: RE: [Discuss-gnuradio] Fwd: USRP Packet
present therefore no output present
-- Forwarded message --
From: Brian <clarkb...@gmail.com>
Date: 4 July 2017 at 10:38
Subject: RE: [Discuss-gnuradio] USRP Packet Decoder and Encoder
To: Mojtaba Mansour Abadi <mansourabadi.mojt...@gmail.com>
Derek and Mojitaba,
Thanks for
Hi Brian,
>From my experience, if packet decoder is not receiving any detectable preamble
>bit sequence there will be no output.
>From your email I realised that you’re receiving noise-like signal if decoder
>is bypassed. So I also agree with Derek that either you probably are not
>receiving
t the outputs of
>
> ifconfig
>
> for PC1 and PC2.
>
> Also, I don't know anything about the B210 - it may not be possible to
> do what you're trying to do - but try it anyway.
>
> -- Cinaed
>
>
>
> >
> > Cheers.
> >
> > Sincerely,
in /examples/digital/ofdm, however, works fine. But
still I cannot ping the machines.
Cheers.
Regards,
Mansour.
https://www.linkedin.com/in/mojtaba-mansour-abadi-4311b451
Mojtaba Mansour Abadi
Editorial Board
Journal of Advanced Engineering
IGRPS
http://igrps.org/journal-of-advanced-engineering.php
From
-mansour-abadi-4311b451
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graph it back onto the original flow graph.
>
> -- Cinaed
>
>
> On 05/24/2017 10:32 AM, Mojtaba Mansour Abadi wrote:
> > Hi Everyone,
> >
> >
> > I am trying to benefit "Correlation Estimator" block to tag the preamble
> > of the transmit bit
uppose to deteriorate the
demodulation performance?
The flowgraph is attached to the email.
--
Regards,
Mansour.
https://www.linkedin.com/in/mojtaba-mansour-abadi-4311b451
PSK_Mod_Demod.grc
Description: Binary data
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>
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Regards,
Mansour.
https://www.linkedin.com/in/mojtaba-mansour-abadi-4311b451
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ny case, this is known as bpsk - or your case dbpsk - differential
> bpsk.
>
> I would add the CMA Equalizer between the Polyphase clock and Costa Loop.
>
> -- Cinaed
>
>
>
> On 05/17/2017 08:59 AM, Mojtaba Mansour Abadi wrote:
> > Hi Everyone,
> >
> > The flowgraph I
Hi Everyone,
The flowgraph I am implementing is simple and straight forward. I am
modulation a set of data and a known preamble. The modulations I am looking
at are either PSK or QAM. After a block of "Channel Model", I want to
demodulate the signal and obviously, for fair SNR values I should
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