Re: [Discuss-gnuradio] Question on state machine implementation in GNURadio

2015-05-31 Thread Marcus Müller 
Hi Anil,

On 05/31/2015 07:36 AM, Anil Kumar Yerrapragada wrote:
> Hi
>
> I was just wondering if it is possible to implement a state machine
> logic using GNURadio. Where each state is a block and incoming data
> passes through these states.
No. I don't know what you really have in mind, but blocks are blocks and
not states.
> I want to be able to control which block gets executed when, based on
> some state transition logic which I will define.
You can always halt the flow graph and reconfigure it; for the problem
you've described I'd definitely use the tagged stream logic I tried to
explain.
>
> For example in a receiver model, energy detect, synchronisation,
> channel estimation, equalisation and detection could be the states and
> each state would operate on incoming data based on a transition logic.
You should have a look at reconfiguration. But much more, I think it's a
good idea to have a look at existing frameworks -- maybe you'd want to
understand the ofdm_rx example in gr-digital/examples?

Best regards,
Marcus

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Re: [Discuss-gnuradio] [trellis - ofdm]

2015-05-31 Thread dcardona 
Hello Rita's pcf

I'm trying to use the trellis encoder with the ofdm mod and the ofdm demod
too. 
Could you please tell me why it can't be used just by connecting the trellis
encoder's output with the ofdm mod's input.

Did you find a way to do this?

Please forgive me for my english



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Re: [Discuss-gnuradio] [trellis - ofdm]

2015-05-31 Thread Marcus Müller 
Hi DCardona,

you should be able to do that -- could you explain what *doesn't work*?
Your problem description is too vague to help you.
By the way, your English is excellent; don't worry.

but: who is Rita, and what's her pcf?

Best regards,
Marcus

On 05/31/2015 04:39 PM, dcardona wrote:
> Hello Rita's pcf
>
> I'm trying to use the trellis encoder with the ofdm mod and the ofdm demod
> too. 
> Could you please tell me why it can't be used just by connecting the trellis
> encoder's output with the ofdm mod's input.
>
> Did you find a way to do this?
>
> Please forgive me for my english
>
>
>
> --
> View this message in context: 
> http://gnuradio.4.n7.nabble.com/trellis-ofdm-tp29324p53950.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
>
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Re: [Discuss-gnuradio] SDRA, Programme complete

2015-05-31 Thread Stefano Sinagra 
2015-05-30 23:09 GMT+02:00 Iluta V :

>
> PS. To whom it may concern:  95% of hotels are sold out in the town
> already.
>

Btw if you can get any transportation, there's quite a few cheaper and nice
places in a 20km radius, most of which don't appear on the usual hotel
booking websites.

The HamRadio event is a pretty major one and many of us tend to book in
January or so to make sure we get the hotels we like.

Best regards

Stefano
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Re: [Discuss-gnuradio] [trellis - ofdm]

2015-05-31 Thread dcardona 
Hi Marcus

Thank you for your quick response.

I think it works. I mean, i'm using an Error Rate block to compare the
Trellis Enoder's output and the Viterbi Combos' output (I'm also doing this
with the PCCC Encoder and the PCCC Decoder Combo blocks) and the results is
0 (like it should be).  But i'm not sure if i'm missing something because
the Viterbi Combo block (and the PCCC Decoder Combo) uses a constellation
parameter, doesnt that mean that it decodes and demodulates at the same
time? 
The OFDM Mod block makes a digital modulation, and the OFDM Demod block
demodulates it.
So, am I demodulating twice? I am new at this and i don't know if I am
wrong.

I'm sending you my flowgraph, if you could see it, i would be really
gratefull.

Thank you very much.

Pd: I though Rita's pcf was a user and I was answering a post. Sorry if I
was wrong. Like I said, I'm new at this.
FUNCIONA__INTENTOCOMPLETO_PCC_OFDMMOD_OFDMDEMOD_ErrorRate_VECTOR.grc

  



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[Discuss-gnuradio] Using theme with QTGUI qss files makes transition lines between points on QT GUI Constellation Sink

2015-05-31 Thread John Murphy 
The new GRC theme system using qss files looks pretty neat and seems very
user configurable. Thanks.

To use this, with my build-gnuradio installed setup, I had to create a new
file under my home user folder at /home/me/.gnuradio/config.conf and I had
to add the following to that file.

[QTGUI]
qss = /usr/local/share/gnuradio/themes/alt.qss

To go back to the normal theme I just commented out that line, like so...

[QTGUI]
#qss = /usr/local/share/gnuradio/themes/alt.qss

All this works just fine.

*BUT*

I did run into one issue using this with a QT GUI Constellation Sink.

The constellation points have the lines turned on running between them (ie
so they look like a transition diagram instead of what I think of as a
constellation diagram).

So before I asked for help here I thought I'd have some fun with it and
tried some stuff on my own.

I tried adding the following to the alt.qss file in my
/usr/local/share/gnuradio/themes folder (had to change file permissions on
the qss files to do this with my editor - but I am guessing the permissions
change is not an issue).

ConstellationDisplayPlot {
qproperty-line_style1: None;
qproperty-line_style2: None;
qproperty-line_style3: None;
}

I put this between the VectorDIsplayPlot entries and the QwtPlotCanvas
entries.
I also tried replacing the similar lines in DisplayPlot with the selections
for "None" I show above.

None of that changed the constellation to remove the lines between points.

To make sure I was having 'some' effect, I tried making the background for
the whole plot an ugly green color (changing the top QWidget
background-color) and that worked, so I am at least affecting something
with that file if I had the syntax and context correct.

I did the requesite Google search on "QtCore.Qt.DashLine" to see if there
was a syntax aside from "None" that would be correct, but while I could
find syntax for several other line choices I did not a find syntax for a
choice for no line. So it is possible the issue is deeper than just a qss
configuration line.

*SO*

Any idea how to make the QT constellation plots not have the transition
lines between points when using one of the qss sheets?

Thanks,
- John
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Re: [Discuss-gnuradio] SDRA, Programme complete

2015-05-31 Thread Markus Heller 
Dear Iluta,

in SDRA we don't have a specific talk on extraterrestrial radio
applications, but the entire HAMRADIO event is on Space Applicatons. 

So it depends on which event you plan to attend. 

Generally you can say that the entire event is a lot of fun and allows
people to bring their own stuff. 

If you have some specific experiments you want to report about, you are
still free to make a poster and present the poster in front of the
entrance of the SDRA. We will support you with this plan. 

vy73
markus
dl8rds


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[Discuss-gnuradio] Getting together in Korea to talk SDR

2015-05-31 Thread Matt Ettus 
Friends in the Seoul area,

I will be visiting between June 2nd and June 7th, and will have some
free time.  I would love to get together with USRP and GNU Radio users
while I'm there.  I'd be up for anything from talking about SDR over
lunch/dinner, all the way through giving a presentation about USRPs
and RFNoC to a group at your university, club, or company.

Please contact me off list if you'd be interested in getting together!
 This is my first time in Korea, and I am excited to be going.

Thanks,
Matt Ettus

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[Discuss-gnuradio] UHD on Windows 7

2015-05-31 Thread Jakub Jebbjeb 
Hello
I'm trying to figure out uhd on Windows 7. I install 
uhd_003.008.003-release_Win64_VS2013.exe and install Microsoft visual C++ 
redistributable ver 12.0.30501 and when I try uhd_find_devices command i have 
response that at my system there is not find MSVCP120.dll

Jakub
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Re: [Discuss-gnuradio] Using theme with QTGUI qss files makes transition lines between points on QT GUI Constellation Sink

2015-05-31 Thread Seth Hitefield 
Try removing these lines from the DisplayPlot {} section:

qproperty-line_style1: SolidLine;
qproperty-line_style2: DashLine;
qproperty-line_style3: DotLine;

Since the lines are also in Frequency plot and Vector plot sections, that 
change should not affect them. 
It might mess up a Time plot, but then you can just add those lines to that 
section to fix it.

— Seth

> On May 31, 2015, at 12.36, John Murphy  
> wrote:
> 
> The new GRC theme system using qss files looks pretty neat and seems very 
> user configurable. Thanks.
> 
> To use this, with my build-gnuradio installed setup, I had to create a new 
> file under my home user folder at /home/me/.gnuradio/config.conf and I had to 
> add the following to that file.
> 
> [QTGUI]
> qss = /usr/local/share/gnuradio/themes/alt.qss
> 
> To go back to the normal theme I just commented out that line, like so...
> 
> [QTGUI]
> #qss = /usr/local/share/gnuradio/themes/alt.qss
> 
> All this works just fine.
> 
> *BUT*
> 
> I did run into one issue using this with a QT GUI Constellation Sink.
> 
> The constellation points have the lines turned on running between them (ie so 
> they look like a transition diagram instead of what I think of as a 
> constellation diagram).
> 
> So before I asked for help here I thought I'd have some fun with it and tried 
> some stuff on my own.
> 
> I tried adding the following to the alt.qss file in my 
> /usr/local/share/gnuradio/themes folder (had to change file permissions on 
> the qss files to do this with my editor - but I am guessing the permissions 
> change is not an issue).
> 
> ConstellationDisplayPlot {
> qproperty-line_style1: None;
> qproperty-line_style2: None;
> qproperty-line_style3: None;
> }
> 
> I put this between the VectorDIsplayPlot entries and the QwtPlotCanvas 
> entries.
> I also tried replacing the similar lines in DisplayPlot with the selections 
> for "None" I show above.
> 
> None of that changed the constellation to remove the lines between points.
> 
> To make sure I was having 'some' effect, I tried making the background for 
> the whole plot an ugly green color (changing the top QWidget 
> background-color) and that worked, so I am at least affecting something with 
> that file if I had the syntax and context correct.
> 
> I did the requesite Google search on "QtCore.Qt.DashLine" to see if there was 
> a syntax aside from "None" that would be correct, but while I could find 
> syntax for several other line choices I did not a find syntax for a choice 
> for no line. So it is possible the issue is deeper than just a qss 
> configuration line.
> 
> *SO*
> 
> Any idea how to make the QT constellation plots not have the transition lines 
> between points when using one of the qss sheets?
> 
> Thanks,
> - John
> 
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[Discuss-gnuradio] USRP2/Gnuradio - satellite application

2015-05-31 Thread Abdeslam Bourkane 
Good evening,

I will appreciate  your help and guidance. since 3 weeks I'm trying to
implement  an application
 to derive the sky noise and attenuation from a beacon satellite signal.
Using gnuardio and USRP2 (Ettus N210) I'm able to receive the and see the
beacon signal at a defined frequency (FFT plot). What I need is write an
application in python or C++ that allow to me to retrieve and plot the
skynoise and attenuation values.
The problem I have is when using the blocks in gnuradio how to retrieve the
signal power so then I can use a math formulas to derive both attenuation
and skynoise and then plot them again in new graph to show them?

I would appreciate any help from your side.

Thank you and best regards

*Abdeslam Bourkane*
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Re: [Discuss-gnuradio] USRP2/Gnuradio - satellite application

2015-05-31 Thread Marcus Müller 
Hi Abdeslam,

I assume you already have definite formulas that define the estimator
for these two numbers.
Unless you can directly "click together" that estimator in GRC, you will
most likely have to implement it.
In many cases, doing this in Python is rather easy (especially if you
come from a python or matlab background),
so I'd recommend reading at least the first 3 chapters of
https://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials

Best regards,
Marcus

On 06/01/2015 06:16 AM, Abdeslam Bourkane wrote:
> Good evening,
>
> I will appreciate  your help and guidance. since 3 weeks I'm trying to
> implement  an application 
>  to derive the sky noise and attenuation from a beacon satellite
> signal. Using gnuardio and USRP2 (Ettus N210) I'm able to receive the
> and see the beacon signal at a defined frequency (FFT plot). What I
> need is write an application in python or C++ that allow to me to
> retrieve and plot the skynoise and attenuation values. 
> The problem I have is when using the blocks in gnuradio how to
> retrieve the signal power so then I can use a math formulas to derive
> both attenuation and skynoise and then plot them again in new graph to
> show them?
>
> I would appreciate any help from your side.
>
> Thank you and best regards
>
> *Abdeslam Bourkane*
>
>
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Re: [Discuss-gnuradio] USRP2/Gnuradio - satellite application

2015-05-31 Thread Sylvain Munaut 
Hi,

> The problem I have is when using the blocks in gnuradio how to retrieve the
> signal power

You mean you want the signal power as a dBm value ?

Just won't happen ... Too many things in the chain, you'd have to
calibrate it for a specific freq / board / gain / temp / phase of the
moon / ...


Cheers,

   Sylvain

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