Re: [Discuss-gnuradio] Discuss-gnuradio Digest, Vol 140, Issue 9

[gsm voip]

On 09-Jul-2014, at 9:31 pm, address@hidden wrote:

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> Today's Topics:
> 
>   1. Morse code (CW) decoder for GNURadio (Vanush Vaswani)
>   2. Re: unable to install gnuradio-3.4.2 (Ralph A. Schmid, dk5ras)
>   3. Re: No 'source' in Gnuradio Companion (Andre-John Mas)
>   4. BER measurement for QAM transmission with USRP   wirelessly
>      (Sun Wenbin)
>   5. 'Counts' in WX Scope Plot (jsam45)
>   6. Re: 'Counts' in WX Scope Plot (Marcus M?ller)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 8 Jul 2014 20:10:34 +1000
> From: Vanush Vaswani <address@hidden>
> To: "address@hidden" <address@hidden>
> Subject: [Discuss-gnuradio] Morse code (CW) decoder for GNURadio
> Message-ID:
>       <address@hidden>
> Content-Type: text/plain; charset=UTF-8
> 
> Dear all, I am looking for a morse code decoder for gnuradio, does
> anyone have a link?
> 
> Regards
> Vanush
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Tue, 8 Jul 2014 11:19:24 +0200
> From: "Ralph A. Schmid, dk5ras" <address@hidden>
> To: 'Marcus M?ller' <address@hidden>,
>       <address@hidden>
> Subject: Re: [Discuss-gnuradio] unable to install gnuradio-3.4.2
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Usually 3.4.2 is used when OpenBTS together with an USRP1 should work. BTDT
> :)
Yes correct Ralph, but when I am trying to install with downgraded python 
(before it was up and running on 2.6 while 12.04 comes with 2.7 pre installed) 
seeing lot of problems, I think main issue is with auto tools, as I upgraded 
python to 2.7 again but did not ./bootstrap, but direct ./configure, make and 
sudo make install, everything seems fine now
Thanks guys
> 
> 
> Ralph.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> From: address@hidden
> [mailto:address@hidden On Behalf Of
> Marcus M?ller
> Sent: Monday, July 7, 2014 4:22 PM
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] unable to install gnuradio-3.4.2
> 
> 
> 
> Hello um, nameless!
> 
> I could imagine that a lot of tools, possibly including py_compile have
> changed significantly since 3.4.2 (October 2011), although you also are
> using a strongly outdated Ubuntu, so things might still match.
> 
> The problem is that most people on here are actively developing and using
> recent versions of GNU Radio with state of the art operating systems, so it
> might be hard for us to reproduce your issue. You should try to downgrade
> your python and see if that helps, that's the only idea I can think of right
> now. There was an issue that was fixed around mid-2011 with the automake
> tools that revolved around the --destdir flag, but I can't really remember;
> that fix should, however, be included in Ubuntu 12.04.
> 
> There's too many things that changed since 3.4.2 since then. By the way: I'm
> not totally clear why you actually would want to use 3.4.2; the build system
> is intimidating compared to the current, CMake-based one, making error
> search a lot more painful, and many aspects of GNU Radio should still be
> compliant to 3.6.5, which is the preferred version to use if you're bound to
> the old pre-3.7 API.
> 
> All the best,
> Marcus
> 
> 
> 
> On 07.07.2014 15:36, gsmandvoip wrote:
> 
> Hi list,
> try to install older version of gnuradio (3.4.2 with gcc-4.4 on ubuntu
> 12.04) but after successful make, when trying make install, getting
> following errors:
> 
> 
> test -z "/usr/local/lib/python2.7/dist-packages/gruel/pmt" || /bin/mkdir -p
> "/usr/local/lib/python2.7/dist-packages/gruel/pmt"
> /usr/bin/install -c -m 644 pmt_swig.py
> '/usr/local/lib/python2.7/dist-packages/gruel/pmt'
> ../../../py-compile: Missing argument to --destdir.
> make[7]: *** [install-pmt_swig_pythonPYTHON] Error 1
> 
> 
> tried on Google a lot but no luck, please point out whats going wrong
> here???
> 
> 
> 
> 
> 
> 
> 
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> ------------------------------
> 
> Message: 3
> Date: Tue, 8 Jul 2014 09:19:30 -0400
> From: Andre-John Mas <address@hidden>
> To: Martin Braun <address@hidden>
> Cc: "address@hidden" <address@hidden>
> Subject: Re: [Discuss-gnuradio] No 'source' in Gnuradio Companion
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="us-ascii"
> 
> 
>> On 7 Jul 2014, at 18:18, "Martin Braun" <address@hidden> wrote:
>> 
>>> On 07/07/2014 10:43 PM, Andre-John Mas wrote:
>>> Hi,
>>> 
>>> I have just installed gnuradio companion on MacOS X, by means of
>>> MacPorts, in the hope of using it with rtl-sdr. The issue is I don't
>>> see any 'source' item available for me to specify my input, when I
>>> look at the right hand pane. Is there something I should have
>>> configured or where I can find this?
>> 
>> With Ctrl-F (or /) you can start a search. What kind of source are you
>> looking for? The osmosdr/rtlsdr source? Do you have gr-osmosdr (and
>> deps) installed?
> 
> Looks like that was my issue.  Installing the "gr-osmosdr" port solved this. 
> 
> Thanks
> 
> Andre
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Wed, 9 Jul 2014 16:51:57 +0800
> From: Sun Wenbin <address@hidden>
> To: "address@hidden" <address@hidden>
> Subject: [Discuss-gnuradio] BER measurement for QAM transmission with
>       USRP    wirelessly
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="gb2312"
> 
> Good day everyone,
> Cool. Got it working. Thank you Vanush Vaswani for your reply.
> By the way, does anyone knows how does QAM Mod takes in and QAM Demod output 
> their data?
> 
> Similarly i found out that they are both not identical but cant figure out 
> how the data is formed.
> Thanks for your time reading.
> Regards,Sun
>> From: address@hidden
>> Date: Fri, 4 Jul 2014 18:53:21 +1000
>> Subject: Re: [Discuss-gnuradio] BER measurement for GMSK transmission with 
>> USRP wirelessly
>> To: address@hidden
>> CC: address@hidden
>> 
>> GMSK Mod takes in packed bytes, Demod outputs unpacked bytes (e.g. 1
>> bit per byte). You may need to perform a conversion. Best way to
>> figure out is to post a screenshot of your flowgraph.
>> 
>> On Fri, Jul 4, 2014 at 6:18 PM, Sun Wenbin <address@hidden> wrote:
>>> Good day everyone,
>>> 
>>> My sincere apology in advance if this question has been asked before, but i
>>> tried search thru the archives but to no avail.
>>> 
>>> 
>>> Currently, I am trying to calculate the BER for GMSK, But first I started
>>> off on a perfect channel without USRP.
>>> 
>>> 
>>> My current block diagram is as follows:
>>> 
>>> "Random Source"
>>> 0s and 1s, 10^6 windows -> "Throttle" -> "GMSK Mod (default settings)" ->
>>> "GMSK Demod (default settings)" -> "Error Rate Block"
>>> 
>>> I am feeding in "Error Rate block" with the random source and the "GMSK
>>> Demod" Output.
>>> 
>>> I am getting BER of 50%... Anyone knows what is wrong?
>>> 
>>> In fact, I saved the input and output as binary files. I found out that they
>>> are not very identical especially in terms of binary length. I tried input 9
>>> bits of binary and I obtained 63 bits from the GMSK Demod Output.
>>> 
>>> Is there something that is missing?
>>> 
>>> Hope someone can advise me. Thank you :)
>>> 
>>> Best Regards,
>>> Sun
>>> 
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>> 
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> ------------------------------
> 
> Message: 5
> Date: Wed, 9 Jul 2014 02:09:30 -0700 (PDT)
> From: jsam45 <address@hidden>
> To: address@hidden
> Subject: [Discuss-gnuradio] 'Counts' in WX Scope Plot
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset=us-ascii
> 
> The vertical axis in Scope Plot is labelled as Counts. What does it mean? How
> is it related to the physical parameters of the signal like amplitude/power?
> 
> 
> 
> --
> View this message in context: 
> http://gnuradio.4.n7.nabble.com/Counts-in-WX-Scope-Plot-tp49248.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
> 
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Wed, 09 Jul 2014 12:04:04 +0200
> From: Marcus M?ller <address@hidden>
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] 'Counts' in WX Scope Plot
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Hi Joseph (hope that's the right name, if not, please correct me ;) ),
> 
> well, GNU Radio is software defined radio; the data it processes are
> simply numbers, so its unit is 1.
> If your signal comes from an ADC, then it *might be* proportional to
> Volts at the receiver; however, you usually do a lot of processing after
> receiving, so using Volts as a unit is kind of wrong, because none of
> the components consider these numbers to represent a voltage. If you
> happen to square your signal, the display would be proportional to
> power, instead, so there's no way to tell you "the scope sink displays
> physical entity <insert>"; it all depends on what you let it display.
> 
> I hope that helped a little,
> 
> Greetings,
> Marcus M?ller
> 
> On 09.07.2014 11:09, jsam45 wrote:
>> The vertical axis in Scope Plot is labelled as Counts. What does it mean? How
>> is it related to the physical parameters of the signal like amplitude/power?
>> 
>> 
>> 
>> --
>> View this message in context: 
>> http://gnuradio.4.n7.nabble.com/Counts-in-WX-Scope-Plot-tp49248.html
>> Sent from the GnuRadio mailing list archive at Nabble.com.
>> 
>> _______________________________________________
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