Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

On 1/28/19 8:49 AM, Luis Felipe Albarracin Sanchez wrote:
> Hello Cinaed,
> 
> Thank you for the response,
> 
> I have detailed your Flowgraph, and I placed a "QT GUI Constellation
> Sink" after the chunks to symbols block, and what I found is that the
> modulation part only modulates in B-PSK, and this is beacuse you set it 
> in the "Chunks to symbol block" with a dimension of "1", once I placed
> different "Symbol Table" and a "dimension" of 2 in the "Chunk to symbol
> block" the correct modulation appeared, but the BER gave really high
> values (even if in the "Constellation Decoder" is set to  QPSK or DQPSK).

I already answered this - it's documented on the flowgraph - and I
answered it in a previous email.

BER only has 2 points - 0,1 - the constellation points aren't used.

The 8PSK decoder outputs 1,0 which creates an inverted pulse relative to
the reference input to the BER - the random number generator - and the
BER sky rockets.

So instead of using -1,1 in the chunks to symbols, I had to use 1,-1.

Is my flowgraph the correct way to calculate the BER? I have no idea.
The only thing I can say about it is the BER is 0 without white noise.

I've never done a BER calculation. When the BER is high on physical
MODEM I buy a new one.

The only thing I know is if you want to calculated bit error rate on the
order of ppm after adding white noise, and the computational error
without adding white noise is on the order percent, then the BER after
adding white noise would be impossible to detect.

And I know very little about QT - I just use the QT GUI blocks for
debugging.

But my intuition tells me you can't change the modulation object on the
fly while the flowgraph is running - but don't let that stop you from
trying.

> 
> I believe you only modulated in BPSK and in the decoder it matched the
> constellation points for -1 and 1, but not for any other constellation
> points, I would appreciate if you correct me if i am wrong.
> 
> Kind regards.
> 
> On Mon, Jan 28, 2019 at 5:12 AM Cinaed Simson  > wrote:
> 
> On 1/27/19 7:03 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed,
> >
> > Thank you so much for all the work in the BER, i tested both of the
> > flowgraphs and they are very accurate regarding the BER
> measurements, i
> > have a couple of questions if you don´t mind:
> >
> > 1- In the latest flowgraph you sent (my-ber-test.grc from Jan
> 25th) how
> > do you change the modulations in the chunks to symbols block, in the
> > flowgraph you sent me the flowgraph table was fixed with the values of
> > "-1, 1", what line of commands should be place there to switch to
> other
> > modulations?
> 
> Correct - I already explain why.
> >
> > 2- The BER measurements you sent me seem so accurate,
> 
> As I already indicated, you still need to add a complex gaussian noise
> source.
> 
>  I wonder if you
> > could take a look at the flowgraph i sent you
> 
> No, use the last flowgraph I sent you.
> 
> 
> > (my_ber_simulation_LFA.grc), what i did there was connecting a QT GUI
> > Chooser to the functions i thougth would change the constellation
> > selected,  do you have any ideas why  my change is not working, when i
> > change in the QT GUI Chooser?, i would appreciate your help
> regarding this.
> >
> > 3- Attached is a flowgraph i have devloped for doing modulations up to
> > 64 QAM, please take a look at it, and if you have any ideas on how i
> > would make a good BER measurement of higher modulations (32 -QAM and
> > 64-QAM) please let me know. To select the modulatios, the easiest
> way is
> > to define in the default value of the QT GUI chooser the value of
> 3 (for
> > 32-QAM) and the value of 4 (for 64 QAM).
> 
> I not going to look your flowgraph - you should be able to add the QAM
> constellations to the last flowgraph I sent you.
> 
> And to be clear, I don't believe can change the modulation of the
> flowgraph with QT. Since you're the believer, the burden of proof is on
> you.
> 
> You need to first demonstrate you can add the 64QAM, and 32QAM to the
> last flowgraph I sent you with DER 0.
> 
> Then add whatever QT modifications you need to make QT change the
> modulation and demonstrate the BER is 0.
> 
> Or just demonstrate you can add QT code which changes the modulation to
> last flowgraph I set you. If can't make the changes so it has BER of 0,
> adding different of more modulations isn't going to help.
> 
> -- Cinaed
> 
> 
> >
> >
> > Once again thanks a lot for all the help.
> >
> > Kind regards.
> >
> > On Fri, Jan 25, 2019 at 3:20 PM Cinaed Simson
> mailto:cinaed.sim...@gmail.com>
> > >>
> wrote:
> >
> >     It bothered me that the random 

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Luis Felipe Albarracin Sanchez]

Hello Cinaed,

Thank you for the response,

I have detailed your Flowgraph, and I placed a "QT GUI Constellation Sink"
after the chunks to symbols block, and what I found is that the modulation
part only modulates in B-PSK, and this is beacuse you set it  in the
"Chunks to symbol block" with a dimension of "1", once I placed different
"Symbol Table" and a "dimension" of 2 in the "Chunk to symbol block" the
correct modulation appeared, but the BER gave really high values (even if
in the "Constellation Decoder" is set to  QPSK or DQPSK).

I believe you only modulated in BPSK and in the decoder it matched the
constellation points for -1 and 1, but not for any other constellation
points, I would appreciate if you correct me if i am wrong.

Kind regards.

On Mon, Jan 28, 2019 at 5:12 AM Cinaed Simson 
wrote:

> On 1/27/19 7:03 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed,
> >
> > Thank you so much for all the work in the BER, i tested both of the
> > flowgraphs and they are very accurate regarding the BER measurements, i
> > have a couple of questions if you don´t mind:
> >
> > 1- In the latest flowgraph you sent (my-ber-test.grc from Jan 25th) how
> > do you change the modulations in the chunks to symbols block, in the
> > flowgraph you sent me the flowgraph table was fixed with the values of
> > "-1, 1", what line of commands should be place there to switch to other
> > modulations?
>
> Correct - I already explain why.
> >
> > 2- The BER measurements you sent me seem so accurate,
>
> As I already indicated, you still need to add a complex gaussian noise
> source.
>
>  I wonder if you
> > could take a look at the flowgraph i sent you
>
> No, use the last flowgraph I sent you.
>
>
> > (my_ber_simulation_LFA.grc), what i did there was connecting a QT GUI
> > Chooser to the functions i thougth would change the constellation
> > selected,  do you have any ideas why  my change is not working, when i
> > change in the QT GUI Chooser?, i would appreciate your help regarding
> this.
> >
> > 3- Attached is a flowgraph i have devloped for doing modulations up to
> > 64 QAM, please take a look at it, and if you have any ideas on how i
> > would make a good BER measurement of higher modulations (32 -QAM and
> > 64-QAM) please let me know. To select the modulatios, the easiest way is
> > to define in the default value of the QT GUI chooser the value of 3 (for
> > 32-QAM) and the value of 4 (for 64 QAM).
>
> I not going to look your flowgraph - you should be able to add the QAM
> constellations to the last flowgraph I sent you.
>
> And to be clear, I don't believe can change the modulation of the
> flowgraph with QT. Since you're the believer, the burden of proof is on
> you.
>
> You need to first demonstrate you can add the 64QAM, and 32QAM to the
> last flowgraph I sent you with DER 0.
>
> Then add whatever QT modifications you need to make QT change the
> modulation and demonstrate the BER is 0.
>
> Or just demonstrate you can add QT code which changes the modulation to
> last flowgraph I set you. If can't make the changes so it has BER of 0,
> adding different of more modulations isn't going to help.
>
> -- Cinaed
>
>
> >
> >
> > Once again thanks a lot for all the help.
> >
> > Kind regards.
> >
> > On Fri, Jan 25, 2019 at 3:20 PM Cinaed Simson  > > wrote:
> >
> > It bothered me that the random source wasn't working.
> >
> > So I took at it again last night and discovered I needed to unpack a
> bit
> > from the random source stream.
> >
> > Using the random source, the following work:
> >
> >   BPSK
> >   QPSK
> >   8PSK
> >   16QAM
> >
> > using the pull down menu.
> >
> > There is, however, one caveat: for 8PSK you have to enable the
> complex
> > Multiply Const by -1 block after the Chunks to Symbols block.
> >
> > Alternatively, you could change Chunks to Symbols from -1,1 to 1,-1 -
> > but that's many more key strokes then just enabling and disabling the
> > Multiply Const block.
> >
> > They all work with the GLFSR source too and with the same caveat.
> >
> > And you were right you don't need the PSK symbol table - you can use
> > Chunks to Symbols -1,1 (except for 8PKS.)
> >
> > Also, I had to add a unpack k=1 block after the decoder - otherwise
> for
> > DPSK, 8PSK and 16QAM there was a vertical offset and BER sky rockets.
> >
> > The unpack k=1 is not needed for BPSK and QPSK - but it doesn't
> create
> > any problems so I left it enabled.
> >
> > You just need to add the complex noise source
> >
> > Have fun with QT.
> >
> > Actually, there is already a QT menu - the properties of
> Constellation
> > Object. You might want to look at the source - just figure what you
> need
> > to do to keep it open.
> >
> > -- Cinaed
> >
> >
> >
> > --
> > Eng. Luis Felipe Albarracin
> > Msc. Telematics / MBA
> > PMP
> > CCNA/CCDA/CCNP/CCDP/CCIP
> > ITIL v3 Foundation
> > 

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

On 1/27/19 7:03 PM, Luis Felipe Albarracin Sanchez wrote:
> Hello Cinaed,
> 
> Thank you so much for all the work in the BER, i tested both of the
> flowgraphs and they are very accurate regarding the BER measurements, i
> have a couple of questions if you don´t mind:
> 
> 1- In the latest flowgraph you sent (my-ber-test.grc from Jan 25th) how
> do you change the modulations in the chunks to symbols block, in the
> flowgraph you sent me the flowgraph table was fixed with the values of
> "-1, 1", what line of commands should be place there to switch to other
> modulations?

Correct - I already explain why.
> 
> 2- The BER measurements you sent me seem so accurate, 

As I already indicated, you still need to add a complex gaussian noise
source.

 I wonder if you
> could take a look at the flowgraph i sent you

No, use the last flowgraph I sent you.


> (my_ber_simulation_LFA.grc), what i did there was connecting a QT GUI
> Chooser to the functions i thougth would change the constellation
> selected,  do you have any ideas why  my change is not working, when i
> change in the QT GUI Chooser?, i would appreciate your help regarding this.
> 
> 3- Attached is a flowgraph i have devloped for doing modulations up to
> 64 QAM, please take a look at it, and if you have any ideas on how i
> would make a good BER measurement of higher modulations (32 -QAM and
> 64-QAM) please let me know. To select the modulatios, the easiest way is
> to define in the default value of the QT GUI chooser the value of 3 (for
> 32-QAM) and the value of 4 (for 64 QAM).

I not going to look your flowgraph - you should be able to add the QAM
constellations to the last flowgraph I sent you.

And to be clear, I don't believe can change the modulation of the
flowgraph with QT. Since you're the believer, the burden of proof is on
you.

You need to first demonstrate you can add the 64QAM, and 32QAM to the
last flowgraph I sent you with DER 0.

Then add whatever QT modifications you need to make QT change the
modulation and demonstrate the BER is 0.

Or just demonstrate you can add QT code which changes the modulation to
last flowgraph I set you. If can't make the changes so it has BER of 0,
adding different of more modulations isn't going to help.

-- Cinaed


> 
> 
> Once again thanks a lot for all the help.
> 
> Kind regards.
> 
> On Fri, Jan 25, 2019 at 3:20 PM Cinaed Simson  > wrote:
> 
> It bothered me that the random source wasn't working.
> 
> So I took at it again last night and discovered I needed to unpack a bit
> from the random source stream.
> 
> Using the random source, the following work:
> 
>   BPSK
>   QPSK
>   8PSK
>   16QAM
> 
> using the pull down menu.
> 
> There is, however, one caveat: for 8PSK you have to enable the complex
> Multiply Const by -1 block after the Chunks to Symbols block.
> 
> Alternatively, you could change Chunks to Symbols from -1,1 to 1,-1 -
> but that's many more key strokes then just enabling and disabling the
> Multiply Const block.
> 
> They all work with the GLFSR source too and with the same caveat.
> 
> And you were right you don't need the PSK symbol table - you can use
> Chunks to Symbols -1,1 (except for 8PKS.)
> 
> Also, I had to add a unpack k=1 block after the decoder - otherwise for
> DPSK, 8PSK and 16QAM there was a vertical offset and BER sky rockets.
> 
> The unpack k=1 is not needed for BPSK and QPSK - but it doesn't create
> any problems so I left it enabled.
> 
> You just need to add the complex noise source
> 
> Have fun with QT.
> 
> Actually, there is already a QT menu - the properties of Constellation
> Object. You might want to look at the source - just figure what you need
> to do to keep it open.
> 
> -- Cinaed
> 
> 
> 
> -- 
> Eng. Luis Felipe Albarracin
> Msc. Telematics / MBA
> PMP
> CCNA/CCDA/CCNP/CCDP/CCIP
> ITIL v3 Foundation
> "Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"


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Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Luis Felipe Albarracin Sanchez]

Hello Cinaed,

Thank you so much for all the work in the BER, i tested both of the
flowgraphs and they are very accurate regarding the BER measurements, i
have a couple of questions if you don´t mind:

1- In the latest flowgraph you sent (my-ber-test.grc from Jan 25th) how do
you change the modulations in the chunks to symbols block, in the flowgraph
you sent me the flowgraph table was fixed with the values of "-1, 1", what
line of commands should be place there to switch to other modulations?

2- The BER measurements you sent me seem so accurate,  I wonder if you
could take a look at the flowgraph i sent you (my_ber_simulation_LFA.grc),
what i did there was connecting a QT GUI Chooser to the functions i thougth
would change the constellation selected,  do you have any ideas why  my
change is not working, when i change in the QT GUI Chooser?, i would
appreciate your help regarding this.

3- Attached is a flowgraph i have devloped for doing modulations up to 64
QAM, please take a look at it, and if you have any ideas on how i would
make a good BER measurement of higher modulations (32 -QAM and 64-QAM)
please let me know. To select the modulatios, the easiest way is to define
in the default value of the QT GUI chooser the value of 3 (for 32-QAM) and
the value of 4 (for 64 QAM).


Once again thanks a lot for all the help.

Kind regards.

On Fri, Jan 25, 2019 at 3:20 PM Cinaed Simson 
wrote:

> It bothered me that the random source wasn't working.
>
> So I took at it again last night and discovered I needed to unpack a bit
> from the random source stream.
>
> Using the random source, the following work:
>
>   BPSK
>   QPSK
>   8PSK
>   16QAM
>
> using the pull down menu.
>
> There is, however, one caveat: for 8PSK you have to enable the complex
> Multiply Const by -1 block after the Chunks to Symbols block.
>
> Alternatively, you could change Chunks to Symbols from -1,1 to 1,-1 -
> but that's many more key strokes then just enabling and disabling the
> Multiply Const block.
>
> They all work with the GLFSR source too and with the same caveat.
>
> And you were right you don't need the PSK symbol table - you can use
> Chunks to Symbols -1,1 (except for 8PKS.)
>
> Also, I had to add a unpack k=1 block after the decoder - otherwise for
> DPSK, 8PSK and 16QAM there was a vertical offset and BER sky rockets.
>
> The unpack k=1 is not needed for BPSK and QPSK - but it doesn't create
> any problems so I left it enabled.
>
> You just need to add the complex noise source
>
> Have fun with QT.
>
> Actually, there is already a QT menu - the properties of Constellation
> Object. You might want to look at the source - just figure what you need
> to do to keep it open.
>
> -- Cinaed
>


-- 
Eng. Luis Felipe Albarracin
Msc. Telematics / MBA
PMP
CCNA/CCDA/CCNP/CCDP/CCIP
ITIL v3 Foundation
"Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"


Mod_Simple.grc
Description: Binary data
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Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

It bothered me that the random source wasn't working.

So I took at it again last night and discovered I needed to unpack a bit
from the random source stream.

Using the random source, the following work:

  BPSK
  QPSK
  8PSK
  16QAM

using the pull down menu.

There is, however, one caveat: for 8PSK you have to enable the complex
Multiply Const by -1 block after the Chunks to Symbols block.

Alternatively, you could change Chunks to Symbols from -1,1 to 1,-1 -
but that's many more key strokes then just enabling and disabling the
Multiply Const block.

They all work with the GLFSR source too and with the same caveat.

And you were right you don't need the PSK symbol table - you can use
Chunks to Symbols -1,1 (except for 8PKS.)

Also, I had to add a unpack k=1 block after the decoder - otherwise for
DPSK, 8PSK and 16QAM there was a vertical offset and BER sky rockets.

The unpack k=1 is not needed for BPSK and QPSK - but it doesn't create
any problems so I left it enabled.

You just need to add the complex noise source

Have fun with QT.

Actually, there is already a QT menu - the properties of Constellation
Object. You might want to look at the source - just figure what you need
to do to keep it open.

-- Cinaed



  Wed Jan 23 13:59:42 2019
  
options

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  comment
  


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  _enabled
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  _coordinate
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  _rotation
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Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

Okay, I was really trying to get you do a BER calculation just once -
without getting distracted by QT.

If you look at the output of the random number generator, it's output
appears to be unsigned bytes.

But the output of Constellation decoder, appears to be signed bytes.

At the BER inputs, you're comparing unsigned bytes to signed bytes.

Also, you don't know if the byte streams at the BER terminals are in sync.

The actually BER of your flowgraph is on the order of 30%. A signed byte
maybe 14% of the error (1/7)?

It's impossible to compare the output of the random number generator to
the output of the constellation decoder - 4 bytes of the decoder creates
a float which has a magnitude of roughly 100 - which 100 times large
then the random number.

So I replaced replaced the random source with a GLFSR source and the
inputs to the BER line up nicely in the time sink. The BER is 0x10**-6.

And one last point the symbols for bpsk are 0,1 - not -1,1 - the latter
are the constellation points for bpsk.

Just needs some random noise source.

Note, I'm just making this up as I go along - I've never done a BER
calculation.

-- Cinaed


On 1/22/19 8:29 PM, Luis Felipe Albarracin Sanchez wrote:
> Hello Cinaed and all,
> 
> Thanks for the response.
> 
> Mainly I want to change the modulation directly while running the
> flowgraph (either by QT GUI Chooser or other switch), without having
> others in parallel for future control systems implementations.´
> 
> I don´t know if  you have any ideas or guidelines for this.
> 
> Once again thank you.
> 
> Kind Regards.
> 
> On Tue, Jan 22, 2019 at 9:22 PM Cinaed Simson  > wrote:
> 
> On 1/22/19 1:54 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed, Discussion List,
> >
> > Once again thank you for the response,
> >
> > Please believe me that i have gone through tutorials, and i have
> > understood that in the python Top block i could enable/disable
> blocks, i
> > also went through this specific one for modulations:
> >
> > https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
> >
> > An you are totally correct regarding how to modulate properly, 
> > nevertheless what i am trying to do is that while the flowgraph is
> > running, to switch the modulation (even if is not totally tuned) and
> > that i can see that modulation in the QT  GUI.
> >
> > That´s why, if you take a look at my flowgraph you see how I
> create a QT
> > Chooser so I can select the modulation.
> >
> > My main problem is that i can not get it to work, it does not
> switch to
> > other modulation when I switch in the QT Gui while I run the
> flowgraph.>
> > I would appreciate any ideas regarding this, and also i f you (Cianed)
> > could describe me a little more how a Hierarchical Block could help me
> > in this.
> 
> For hierarchical Block - see the tutorials and Google.
> 
> I use QT for passing variables and parameters - but I mainly use the
> command line. So I can't help you with QT.
> 
> See if you can actually calculate BER for a single psk - say BPSK -
> configure by a Constellation Object.
> 
> If that works, then add another Constellation Object - say for QPSK -
> configured - only for QPSK - so now you have 2 Constellation Objects in
> the flowgraph.
> 
> Now run them in parallel using BER Curve.
> 
> -- Cinaed
> 
> 
> 
> >
> > Once again thank you all.
> >
> > Kind regards.
> >
> > On Tue, Jan 22, 2019 at 3:51 PM Cinaed Simson
> mailto:cinaed.sim...@gmail.com>
> > >>
> wrote:
> >
> >     On 1/22/19 8:51 AM, Luis Felipe Albarracin Sanchez wrote:
> >     > Hello Cinaed,
> >     >
> >     > Thank you for the quick response,
> >     >
> >     > I look at your flowgraph, and i appreciate al the
> corrections you
> >     told me.
> >     >
> >     > I must just say that i was guiding myself through the examples
> >     that are
> >     > under the folder digital when you install GNU Radio.
> >
> >     Those examples presume you have already gone through the
> tutorials.
> >
> >     >
> >     > I took your model, and did some changes to mine (attached my
> new file)
> >     > but i still can´t get in the QT GUI to switch between different
> >     > modulations, if i start with 8-QAM  it does not switch to
> QPSK when i
> >     > choose QPSK in the  QT Chooser, i would appreciate if you
> can give me
> >     > any ideas regarding this.
> >
> >     Right click on the Constellation Object, and there's a pull
> down menu
> >     under Constellation Type  - select the one you want.
> >
> >     If that's not what you're looking for then you have to figure
> out how to
>  

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Luis Felipe Albarracin Sanchez]

Hello Cinaed and all,

Thanks for the response.

Mainly I want to change the modulation directly while running the flowgraph
(either by QT GUI Chooser or other switch), without having others in
parallel for future control systems implementations.´

I don´t know if  you have any ideas or guidelines for this.

Once again thank you.

Kind Regards.

On Tue, Jan 22, 2019 at 9:22 PM Cinaed Simson 
wrote:

> On 1/22/19 1:54 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed, Discussion List,
> >
> > Once again thank you for the response,
> >
> > Please believe me that i have gone through tutorials, and i have
> > understood that in the python Top block i could enable/disable blocks, i
> > also went through this specific one for modulations:
> >
> > https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
> >
> > An you are totally correct regarding how to modulate properly,
> > nevertheless what i am trying to do is that while the flowgraph is
> > running, to switch the modulation (even if is not totally tuned) and
> > that i can see that modulation in the QT  GUI.
> >
> > That´s why, if you take a look at my flowgraph you see how I create a QT
> > Chooser so I can select the modulation.
> >
> > My main problem is that i can not get it to work, it does not switch to
> > other modulation when I switch in the QT Gui while I run the flowgraph.>
> > I would appreciate any ideas regarding this, and also i f you (Cianed)
> > could describe me a little more how a Hierarchical Block could help me
> > in this.
>
> For hierarchical Block - see the tutorials and Google.
>
> I use QT for passing variables and parameters - but I mainly use the
> command line. So I can't help you with QT.
>
> See if you can actually calculate BER for a single psk - say BPSK -
> configure by a Constellation Object.
>
> If that works, then add another Constellation Object - say for QPSK -
> configured - only for QPSK - so now you have 2 Constellation Objects in
> the flowgraph.
>
> Now run them in parallel using BER Curve.
>
> -- Cinaed
>
>
>
> >
> > Once again thank you all.
> >
> > Kind regards.
> >
> > On Tue, Jan 22, 2019 at 3:51 PM Cinaed Simson  > > wrote:
> >
> > On 1/22/19 8:51 AM, Luis Felipe Albarracin Sanchez wrote:
> > > Hello Cinaed,
> > >
> > > Thank you for the quick response,
> > >
> > > I look at your flowgraph, and i appreciate al the corrections you
> > told me.
> > >
> > > I must just say that i was guiding myself through the examples
> > that are
> > > under the folder digital when you install GNU Radio.
> >
> > Those examples presume you have already gone through the tutorials.
> >
> > >
> > > I took your model, and did some changes to mine (attached my new
> file)
> > > but i still can´t get in the QT GUI to switch between different
> > > modulations, if i start with 8-QAM  it does not switch to QPSK
> when i
> > > choose QPSK in the  QT Chooser, i would appreciate if you can give
> me
> > > any ideas regarding this.
> >
> > Right click on the Constellation Object, and there's a pull down menu
> > under Constellation Type  - select the one you want.
> >
> > If that's not what you're looking for then you have to figure out
> how to
> > do whatever it is you want to do. And it may require creating a
> > hierarchical block.
> >
> > My advice is to work through the tutorials.
> >
> > -- Cinaed
> >
> >
> > >
> > > Kind regards.
> > >
> > >
> > >
> > > On Tue, Jan 22, 2019 at 1:00 AM Cinaed Simson
> > mailto:cinaed.sim...@gmail.com>
> > > >>
> > wrote:
> > >
> > > On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> > > > Hello all,
> > > >
> > > > I am exploring  the BER measurements in GNU Radio for
> different
> > > > modulations (I know Error Rate is deprecated) but i tried
> > the example
> > > > under the digital folder for BER measurement and I
> > understood all the
> > > > flowgraph.
> > > >
> > > > After this i wanted to change the modulation in the QT GUI
> so i
> > > added a
> > > > QT Gui Chooser as seen in the flowgraph below:
> > > >
> > > > Captura de pantalla de 2019-01-21 18-37-34.png
> > > >
> > > >
> > > > Attached is the flowgraph for reference.
> > > >
> > > > When i add this i expected that the Constellation would
> change
> > > > accordingly, but it does not  when i choose a different
> > constellation
> > > > with the chooser, for instance if the default value in the
> > chooser is
> > > > QPSK it shows at the beginning:
> > > >
> > > > Captura de pantalla de 2019-01-21 18-44-25.png
> > > >
> > > > But  If i switch in the same 

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

On 1/22/19 1:54 PM, Luis Felipe Albarracin Sanchez wrote:
> Hello Cinaed, Discussion List,
> 
> Once again thank you for the response,
> 
> Please believe me that i have gone through tutorials, and i have
> understood that in the python Top block i could enable/disable blocks, i
> also went through this specific one for modulations:
> 
> https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
> 
> An you are totally correct regarding how to modulate properly, 
> nevertheless what i am trying to do is that while the flowgraph is
> running, to switch the modulation (even if is not totally tuned) and
> that i can see that modulation in the QT  GUI.
> 
> That´s why, if you take a look at my flowgraph you see how I create a QT
> Chooser so I can select the modulation.
> 
> My main problem is that i can not get it to work, it does not switch to
> other modulation when I switch in the QT Gui while I run the flowgraph.>
> I would appreciate any ideas regarding this, and also i f you (Cianed)
> could describe me a little more how a Hierarchical Block could help me
> in this.

For hierarchical Block - see the tutorials and Google.

I use QT for passing variables and parameters - but I mainly use the
command line. So I can't help you with QT.

See if you can actually calculate BER for a single psk - say BPSK -
configure by a Constellation Object.

If that works, then add another Constellation Object - say for QPSK -
configured - only for QPSK - so now you have 2 Constellation Objects in
the flowgraph.

Now run them in parallel using BER Curve.

-- Cinaed



> 
> Once again thank you all.
> 
> Kind regards.
> 
> On Tue, Jan 22, 2019 at 3:51 PM Cinaed Simson  > wrote:
> 
> On 1/22/19 8:51 AM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed,
> >
> > Thank you for the quick response,
> >
> > I look at your flowgraph, and i appreciate al the corrections you
> told me.
> >
> > I must just say that i was guiding myself through the examples
> that are
> > under the folder digital when you install GNU Radio.
> 
> Those examples presume you have already gone through the tutorials.
> 
> >
> > I took your model, and did some changes to mine (attached my new file)
> > but i still can´t get in the QT GUI to switch between different
> > modulations, if i start with 8-QAM  it does not switch to QPSK when i
> > choose QPSK in the  QT Chooser, i would appreciate if you can give me
> > any ideas regarding this.
> 
> Right click on the Constellation Object, and there's a pull down menu
> under Constellation Type  - select the one you want.
> 
> If that's not what you're looking for then you have to figure out how to
> do whatever it is you want to do. And it may require creating a
> hierarchical block.
> 
> My advice is to work through the tutorials.
> 
> -- Cinaed
> 
> 
> >
> > Kind regards.
> >
> >
> >
> > On Tue, Jan 22, 2019 at 1:00 AM Cinaed Simson
> mailto:cinaed.sim...@gmail.com>
> > >>
> wrote:
> >
> >     On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> >     > Hello all,
> >     >
> >     > I am exploring  the BER measurements in GNU Radio for different
> >     > modulations (I know Error Rate is deprecated) but i tried
> the example
> >     > under the digital folder for BER measurement and I
> understood all the
> >     > flowgraph.
> >     >
> >     > After this i wanted to change the modulation in the QT GUI so i
> >     added a
> >     > QT Gui Chooser as seen in the flowgraph below:
> >     >
> >     > Captura de pantalla de 2019-01-21 18-37-34.png
> >     >
> >     >
> >     > Attached is the flowgraph for reference.
> >     >
> >     > When i add this i expected that the Constellation would change
> >     > accordingly, but it does not  when i choose a different
> constellation
> >     > with the chooser, for instance if the default value in the
> chooser is
> >     > QPSK it shows at the beginning:
> >     >
> >     > Captura de pantalla de 2019-01-21 18-44-25.png
> >     >
> >     > But  If i switch in the same running time to 8-PSKn it shows:
> >
> >     Everything - I mean everything - was configured with 8PSK
> constellation
> >     data- and incorrectly - even the random number generator!
> >
> >     I'm surprise you could see anything!
> >
> >     Enclosed is the proper way to create a QPSK constellation.
> >
> >     Work through the tutorials at
> >
> >       https://wiki.gnuradio.org/index.php/Tutorials
> >
> >
> >     -- Cinaed
> >
> >
> >     >
> >     > Captura de pantalla de 2019-01-21 18-44-44.png
> >     >
> >     >
> >     > Which is not an 

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Luis Felipe Albarracin Sanchez]

Hello Cinaed, Discussion List,

Once again thank you for the response,

Please believe me that i have gone through tutorials, and i have understood
that in the python Top block i could enable/disable blocks, i also went
through this specific one for modulations:

https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation

An you are totally correct regarding how to modulate properly,
nevertheless what i am trying to do is that while the flowgraph is running,
to switch the modulation (even if is not totally tuned) and that i can see
that modulation in the QT  GUI.

That´s why, if you take a look at my flowgraph you see how I create a QT
Chooser so I can select the modulation.

My main problem is that i can not get it to work, it does not switch to
other modulation when I switch in the QT Gui while I run the flowgraph.

I would appreciate any ideas regarding this, and also i f you (Cianed)
could describe me a little more how a Hierarchical Block could help me in
this.

Once again thank you all.

Kind regards.

On Tue, Jan 22, 2019 at 3:51 PM Cinaed Simson 
wrote:

> On 1/22/19 8:51 AM, Luis Felipe Albarracin Sanchez wrote:
> > Hello Cinaed,
> >
> > Thank you for the quick response,
> >
> > I look at your flowgraph, and i appreciate al the corrections you told
> me.
> >
> > I must just say that i was guiding myself through the examples that are
> > under the folder digital when you install GNU Radio.
>
> Those examples presume you have already gone through the tutorials.
>
> >
> > I took your model, and did some changes to mine (attached my new file)
> > but i still can´t get in the QT GUI to switch between different
> > modulations, if i start with 8-QAM  it does not switch to QPSK when i
> > choose QPSK in the  QT Chooser, i would appreciate if you can give me
> > any ideas regarding this.
>
> Right click on the Constellation Object, and there's a pull down menu
> under Constellation Type  - select the one you want.
>
> If that's not what you're looking for then you have to figure out how to
> do whatever it is you want to do. And it may require creating a
> hierarchical block.
>
> My advice is to work through the tutorials.
>
> -- Cinaed
>
>
> >
> > Kind regards.
> >
> >
> >
> > On Tue, Jan 22, 2019 at 1:00 AM Cinaed Simson  > > wrote:
> >
> > On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> > > Hello all,
> > >
> > > I am exploring  the BER measurements in GNU Radio for different
> > > modulations (I know Error Rate is deprecated) but i tried the
> example
> > > under the digital folder for BER measurement and I understood all
> the
> > > flowgraph.
> > >
> > > After this i wanted to change the modulation in the QT GUI so i
> > added a
> > > QT Gui Chooser as seen in the flowgraph below:
> > >
> > > Captura de pantalla de 2019-01-21 18-37-34.png
> > >
> > >
> > > Attached is the flowgraph for reference.
> > >
> > > When i add this i expected that the Constellation would change
> > > accordingly, but it does not  when i choose a different
> constellation
> > > with the chooser, for instance if the default value in the chooser
> is
> > > QPSK it shows at the beginning:
> > >
> > > Captura de pantalla de 2019-01-21 18-44-25.png
> > >
> > > But  If i switch in the same running time to 8-PSKn it shows:
> >
> > Everything - I mean everything - was configured with 8PSK
> constellation
> > data- and incorrectly - even the random number generator!
> >
> > I'm surprise you could see anything!
> >
> > Enclosed is the proper way to create a QPSK constellation.
> >
> > Work through the tutorials at
> >
> >   https://wiki.gnuradio.org/index.php/Tutorials
> >
> >
> > -- Cinaed
> >
> >
> > >
> > > Captura de pantalla de 2019-01-21 18-44-44.png
> > >
> > >
> > > Which is not an 8-PSK modulation scheme.
> > >
> > > I would appreciate some help,. regarding what i am doing wrong  for
> > > choosing a Modulation through the QT GUI.
> > >
> > > Thanks in advance.
> > >
> > > Kind Regards.
> > >
> > > ___
> > > Discuss-gnuradio mailing list
> > > Discuss-gnuradio@gnu.org 
> > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> > >
> >
> > ___
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org 
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
> >
> >
> > --
> > Eng. Luis Felipe Albarracin
> > Msc. Telematics / MBA
> > PMP
> > CCNA/CCDA/CCNP/CCDP/CCIP
> > ITIL v3 Foundation
> > "Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"
>
>

-- 
Eng. Luis Felipe Albarracin
Msc. Telematics / MBA
PMP
CCNA/CCDA/CCNP/CCDP/CCIP
ITIL v3 Foundation
"Die Grenzen meiner Sprache bedeuten 

Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

On 1/22/19 8:51 AM, Luis Felipe Albarracin Sanchez wrote:
> Hello Cinaed,
> 
> Thank you for the quick response,
> 
> I look at your flowgraph, and i appreciate al the corrections you told me.
> 
> I must just say that i was guiding myself through the examples that are
> under the folder digital when you install GNU Radio.

Those examples presume you have already gone through the tutorials.

> 
> I took your model, and did some changes to mine (attached my new file)
> but i still can´t get in the QT GUI to switch between different
> modulations, if i start with 8-QAM  it does not switch to QPSK when i
> choose QPSK in the  QT Chooser, i would appreciate if you can give me
> any ideas regarding this.

Right click on the Constellation Object, and there's a pull down menu
under Constellation Type  - select the one you want.

If that's not what you're looking for then you have to figure out how to
do whatever it is you want to do. And it may require creating a
hierarchical block.

My advice is to work through the tutorials.

-- Cinaed


> 
> Kind regards.
> 
> 
> 
> On Tue, Jan 22, 2019 at 1:00 AM Cinaed Simson  > wrote:
> 
> On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello all,
> >
> > I am exploring  the BER measurements in GNU Radio for different
> > modulations (I know Error Rate is deprecated) but i tried the example
> > under the digital folder for BER measurement and I understood all the
> > flowgraph.
> >
> > After this i wanted to change the modulation in the QT GUI so i
> added a
> > QT Gui Chooser as seen in the flowgraph below:
> >
> > Captura de pantalla de 2019-01-21 18-37-34.png
> >
> >
> > Attached is the flowgraph for reference.
> >
> > When i add this i expected that the Constellation would change
> > accordingly, but it does not  when i choose a different constellation
> > with the chooser, for instance if the default value in the chooser is
> > QPSK it shows at the beginning:
> >
> > Captura de pantalla de 2019-01-21 18-44-25.png
> >
> > But  If i switch in the same running time to 8-PSKn it shows:
> 
> Everything - I mean everything - was configured with 8PSK constellation
> data- and incorrectly - even the random number generator!
> 
> I'm surprise you could see anything!
> 
> Enclosed is the proper way to create a QPSK constellation.
> 
> Work through the tutorials at
> 
>   https://wiki.gnuradio.org/index.php/Tutorials
> 
> 
> -- Cinaed
> 
> 
> >
> > Captura de pantalla de 2019-01-21 18-44-44.png
> >
> >
> > Which is not an 8-PSK modulation scheme.
> >
> > I would appreciate some help,. regarding what i am doing wrong  for
> > choosing a Modulation through the QT GUI.
> >
> > Thanks in advance.
> >
> > Kind Regards.
> >
> > ___
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org 
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
> 
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> 
> 
> -- 
> Eng. Luis Felipe Albarracin
> Msc. Telematics / MBA
> PMP
> CCNA/CCDA/CCNP/CCDP/CCIP
> ITIL v3 Foundation
> "Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"


___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
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Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Luis Felipe Albarracin Sanchez]

Hello Cinaed,

Thank you for the quick response,

I look at your flowgraph, and i appreciate al the corrections you told me.

I must just say that i was guiding myself through the examples that are
under the folder digital when you install GNU Radio.

I took your model, and did some changes to mine (attached my new file) but
i still can´t get in the QT GUI to switch between different modulations, if
i start with 8-QAM  it does not switch to QPSK when i choose QPSK in the
QT Chooser, i would appreciate if you can give me any ideas regarding this.

Kind regards.



On Tue, Jan 22, 2019 at 1:00 AM Cinaed Simson 
wrote:

> On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> > Hello all,
> >
> > I am exploring  the BER measurements in GNU Radio for different
> > modulations (I know Error Rate is deprecated) but i tried the example
> > under the digital folder for BER measurement and I understood all the
> > flowgraph.
> >
> > After this i wanted to change the modulation in the QT GUI so i added a
> > QT Gui Chooser as seen in the flowgraph below:
> >
> > Captura de pantalla de 2019-01-21 18-37-34.png
> >
> >
> > Attached is the flowgraph for reference.
> >
> > When i add this i expected that the Constellation would change
> > accordingly, but it does not  when i choose a different constellation
> > with the chooser, for instance if the default value in the chooser is
> > QPSK it shows at the beginning:
> >
> > Captura de pantalla de 2019-01-21 18-44-25.png
> >
> > But  If i switch in the same running time to 8-PSKn it shows:
>
> Everything - I mean everything - was configured with 8PSK constellation
> data- and incorrectly - even the random number generator!
>
> I'm surprise you could see anything!
>
> Enclosed is the proper way to create a QPSK constellation.
>
> Work through the tutorials at
>
>   https://wiki.gnuradio.org/index.php/Tutorials
>
>
> -- Cinaed
>
>
> >
> > Captura de pantalla de 2019-01-21 18-44-44.png
> >
> >
> > Which is not an 8-PSK modulation scheme.
> >
> > I would appreciate some help,. regarding what i am doing wrong  for
> > choosing a Modulation through the QT GUI.
> >
> > Thanks in advance.
> >
> > Kind Regards.
> >
> > ___
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>


-- 
Eng. Luis Felipe Albarracin
Msc. Telematics / MBA
PMP
CCNA/CCDA/CCNP/CCDP/CCIP
ITIL v3 Foundation
"Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"


my-ber_simulation_LFA.grc
Description: Binary data
___
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Re: [Discuss-gnuradio] BER Example - With QT Gui Chooser for Different Modulations Issue

[Cinaed Simson]

On 1/21/19 3:47 PM, Luis Felipe Albarracin Sanchez wrote:
> Hello all,
> 
> I am exploring  the BER measurements in GNU Radio for different
> modulations (I know Error Rate is deprecated) but i tried the example
> under the digital folder for BER measurement and I understood all the
> flowgraph.
> 
> After this i wanted to change the modulation in the QT GUI so i added a
> QT Gui Chooser as seen in the flowgraph below:
> 
> Captura de pantalla de 2019-01-21 18-37-34.png
> 
> 
> Attached is the flowgraph for reference.
> 
> When i add this i expected that the Constellation would change
> accordingly, but it does not  when i choose a different constellation
> with the chooser, for instance if the default value in the chooser is
> QPSK it shows at the beginning:
> 
> Captura de pantalla de 2019-01-21 18-44-25.png
> 
> But  If i switch in the same running time to 8-PSKn it shows:

Everything - I mean everything - was configured with 8PSK constellation
data- and incorrectly - even the random number generator!

I'm surprise you could see anything!

Enclosed is the proper way to create a QPSK constellation.

Work through the tutorials at

  https://wiki.gnuradio.org/index.php/Tutorials


-- Cinaed


> 
> Captura de pantalla de 2019-01-21 18-44-44.png
> 
> 
> Which is not an 8-PSK modulation scheme.
> 
> I would appreciate some help,. regarding what i am doing wrong  for
> choosing a Modulation through the QT GUI.
> 
> Thanks in advance.
> 
> Kind Regards.
> 
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 




  Sat Jul 12 13:50:53 2014
  
options

  author
  Example


  window_size
  1280, 1024


  category
  Custom


  comment
  


  description
  Adjust the noise and constellation... see what happens!


  _enabled
  True


  _coordinate
  (16, 10)


  _rotation
  0


  generate_options
  qt_gui


  hier_block_src_path
  .:


  id
  ber_simulation


  max_nouts
  0


  qt_qss_theme
  


  realtime_scheduling
  


  run_command
  {python} -u {filename}


  run_options
  prompt


  run
  True


  sizing_mode
  fixed


  thread_safe_setters
  


  title
  BER Simulation


  placement
  (0,0)

  
  
variable_qtgui_range

  comment
  


  value
  10


  _enabled
  0


  _coordinate
  (317, 281)


  gui_hint
  


  _rotation
  0


  id
  EbN0


  label
  Eb / N0 (dB)


  min_len
  200


  orient
  Qt.Horizontal


  start
  -10


  step
  1


  stop
  200


  rangeType
  float


  widget
  counter

  
  
variable_qtgui_chooser

  comment
  


  value
  2


  _enabled
  0


  _coordinate
  (152, 404)


  gui_hint
  


  _rotation
  0


  id
  Option1


  label0
  BPSK


  label1
  QPSK


  label2
  8PSK


  label3
  


  label4
  


  label
  


  labels
  []


  num_opts
  3


  option0
  0


  option1
  1


  option2
  2


  option3
  3


  option4
  4


  options
  [0, 1, 2]


  orient
  Qt.QVBoxLayout


  type
  int


  widget
  combo_box

  
  
variable

  comment
  


  _enabled
  0


  _coordinate
  (116, 310)


  _rotation
  0


  id
  const


  value
  (digital.constellation_bpsk(), digital.constellation_qpsk(), digital.constellation_8psk())

  
  
variable_constellation

  comment
  


  const_points
  digital.psk_4()[0]


  type
  calcdist


  dims
  digital.qpsk_constellation().dimensionality()


  _enabled
  1


  _coordinate
  (328, 8)


  _rotation
  0


  id
  qpsk


  rot_sym
  digital.qpsk_constellation().rotational_symmetry()


  soft_dec_lut
  'auto'


  precision
  8


  sym_map
  digital.psk_4()[1]

  
  
variable

  comment
  


  _enabled
  1


  _coordinate
  (736, 36)