] On
Behalf Of Martin Braun
Sent: Friday, July 17, 2015 3:04 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI Constellation
Sink
On 17.07.2015 14:56, Bill Eaton wrote:
What I meant was that you plot the result of your timing + phase
recovery
into an XY
AFAIK the constellation sink just can't do QAM.
The timing recovery loop is uses only work for PSK type modulation.
(so yeah for 4 QAM is works because it's the same as QPSK)
Cheers,
Sylvain
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Discuss-gnuradio mailing list
On 17.07.2015 05:35, Sylvain Munaut wrote:
AFAIK the constellation sink just can't do QAM.
Yeah, and personally I've always doubted the utility of a dedicated
constellation sink (guess what, it's gone in QT). The reason being, if
the GUI widget has it's own demod chain, you're always plotting
= math.log(qam_points)/math.log(2)
From: Neel Pandeya [mailto:neel.pand...@ettus.com]
Sent: Thursday, July 16, 2015 10:46 PM
To: Bill Eaton
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI Constellation Sink
Could you post your flowgraph
@gnu.org
[mailto:discuss-gnuradio-bounces+billeaton=aeroantenna@gnu.org] On Behalf
Of Bill Eaton
Sent: Friday, July 17, 2015 11:13 AM
To: 'Neel Pandeya'; 'Sylvain Munaut'
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI Constellation Sink
Could
-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI
Constellation Sink
On 17.07.2015 12:43, Bill Eaton wrote:
From Martin Braun:
My preference is to build the demod/sync chain with it's own blocks,
and then just output the complex symbols
into either an X
On Fri, Jul 17, 2015 at 12:23 PM, Martin Braun martin.br...@ettus.com
wrote:
On 17.07.2015 05:35, Sylvain Munaut wrote:
AFAIK the constellation sink just can't do QAM.
Yeah, and personally I've always doubted the utility of a dedicated
constellation sink (guess what, it's gone in QT). The
+billeaton=aeroantenna@gnu.org
[mailto:discuss-gnuradio-bounces+billeaton=aeroantenna@gnu.org] On
Behalf Of Martin Braun
Sent: Friday, July 17, 2015 1:20 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI Constellation
Sink
On 17.07.2015 12:43, Bill
On 17.07.2015 12:43, Bill Eaton wrote:
From Martin Braun:
My preference is to build the demod/sync chain with it's own blocks, and then
just output the complex symbols
into either an X/Y plot (WX) or the QT Constellation Sink
Even an X/Y plot ends up looking funny. I’ve attached a GRC
-bounces+billeaton=aeroantenna@gnu.org] On
Behalf Of Martin Braun
Sent: Friday, July 17, 2015 3:04 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] trouble with QAM mod/ WX GUI Constellation
Sink
On 17.07.2015 14:56, Bill Eaton wrote:
What I meant was that you plot the result
Could you post your flowgraph (the GRC file)?
--Neel
On 16 July 2015 at 18:23, Bill Eaton billea...@aeroantenna.com wrote:
I have a desire to use GNURadio + USRP to run a 16 QAM signal through an
amplifier, demodulate, and calculate BER or EVM or some measure of
linearity. That’s the long
I have a desire to use GNURadio + USRP to run a 16 QAM signal through an
amplifier, demodulate, and calculate BER or EVM or some measure of
linearity. That's the long term goal.
For the short term, I thought I would take baby steps. And I got stuck
trying to make pretty constellation plots. My
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