Hi , i am using 16 qam mdulation transmission and reception on gnuradio , I have to do synchronization at reciever side ,I am using correlate and sync block i get the peak but i want to know how to remove preamble from my frame after this block , so please help in this regard
On May 15, 2017 9:03 PM, <discuss-gnuradio-requ...@gnu.org> wrote: > Send Discuss-gnuradio mailing list submissions to > discuss-gnuradio@gnu.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > or, via email, send a message with subject or body 'help' to > discuss-gnuradio-requ...@gnu.org > > You can reach the person managing the list at > discuss-gnuradio-ow...@gnu.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Discuss-gnuradio digest..." > > > Today's Topics: > > 1. Re: GFSK mod/demod does not work OK with wav file (Fernando) > 2. Re: GFSK mod/demod does not work OK with wav file (Cinaed Simson) > 3. Attribute Error (Ayan Chatterjee) > 4. How to write data periodically in file sink (Deepak Gautam) > 5. Re: How to write data periodically in file sink > (Moritz Luca Schmid) > 6. DARPA Hackfest information (Tom Rondeau) > 7. Re: Attribute Error (West, Nathan) > 8. Re: Custom C++ blocks on E310 (Jessica Iwamoto) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 14 May 2017 22:06:52 +0200 > From: Fernando <ferna...@samara.com.es> > Cc: GNURadio Discussion List <discuss-gnuradio@gnu.org> > Subject: Re: [Discuss-gnuradio] GFSK mod/demod does not work OK with > wav file > Message-ID: <b53f32f9-9c0d-389b-e65b-8b377ed10...@samara.com.es> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > With 8 samples/symbol there was aU and CPU at 94% (I have three AMD cores) > I have reduced it to 2 s/s as suggested Cinaed, then aU dissapear and > CPU is at 70%, sound is a little better but still intermittent. > File is sampled at 44100 and with direct connection from wav file source > to audio sink (everything else disabled) it plays fine > > regards > > > > On 12/05/17 22:51, Ben Hilburn wrote: > > Hi Fernando - > > > > Are there are errors / warnings / printouts happening in your GRC log > > window or in your terminal? Do you see `aU` getting printed, by chance? > > > > Also, just to be certain, your wavefile was recorded at 44.1kHz and > > not at something like 48kHz? > > > > Cheers, > > Ben > > > > On Fri, May 12, 2017 at 10:14 AM, Fernando <ferna...@samara.com.es > > <mailto:ferna...@samara.com.es>> wrote: > > > > I'm playing with a GFSK modulator demodulator from here: > > > > https://www.scribd.com/doc/254559988/Gaussian-Frequency- > shift-Keying-With-GNU-Radio > > <https://www.scribd.com/doc/254559988/Gaussian-Frequency- > shift-Keying-With-GNU-Radio> > > > > It works fine when transmitting a cosine, but when I transmit a > > audio signal (everything the same) it sounds bad, with noise and > > intermittent sound. > > > > What am I doing wrong? > > > > > > > > regards > > > > > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170514/4128162f/attachment.html> > > ------------------------------ > > Message: 2 > Date: Sun, 14 May 2017 20:33:47 -0700 > From: Cinaed Simson <cinaed.sim...@gmail.com> > To: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] GFSK mod/demod does not work OK with > wav file > Message-ID: <14478539-df32-da75-4a4d-b19dcef98...@gmail.com> > Content-Type: text/plain; charset=utf-8 > > On 05/14/2017 01:06 PM, Fernando wrote: > > With 8 samples/symbol there was aU and CPU at 94% (I have three AMD > cores> I have reduced it to 2 s/s as suggested Cinaed, then aU dissapear and > > CPU is at 70%, sound is a little better but still intermittent. > > File is sampled at 44100 and with direct connection from wav file source > > to audio sink (everything else disabled) it plays fine > > Try turning on the throttle and see what happens. > > > > > regards > > > > > > > > On 12/05/17 22:51, Ben Hilburn wrote: > >> Hi Fernando - > >> > >> Are there are errors / warnings / printouts happening in your GRC log > >> window or in your terminal? Do you see `aU` getting printed, by chance? > >> > >> Also, just to be certain, your wavefile was recorded at 44.1kHz and > >> not at something like 48kHz? > >> > >> Cheers, > >> Ben > >> > >> On Fri, May 12, 2017 at 10:14 AM, Fernando <ferna...@samara.com.es > >> <mailto:ferna...@samara.com.es>> wrote: > >> > >> I'm playing with a GFSK modulator demodulator from here: > >> > >> https://www.scribd.com/doc/254559988/Gaussian-Frequency- > shift-Keying-With-GNU-Radio > >> <https://www.scribd.com/doc/254559988/Gaussian-Frequency- > shift-Keying-With-GNU-Radio> > >> > >> It works fine when transmitting a cosine, but when I transmit a > >> audio signal (everything the same) it sounds bad, with noise and > >> intermittent sound. > >> > >> What am I doing wrong? > >> > >> > >> > >> regards > >> > >> > >> > >> > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> > >> > >> > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > ------------------------------ > > Message: 3 > Date: Mon, 15 May 2017 11:22:17 +0530 > From: Ayan Chatterjee <ayane...@gmail.com> > To: GNURadio Discussion List <discuss-gnuradio@gnu.org> > Subject: [Discuss-gnuradio] Attribute Error > Message-ID: > <CAAtRgAnBO6koXPAFr+Ejtb9RAZK1AA3Jq+9g5YLFWsk5SLDPVQ@mail.gmail. > com> > Content-Type: text/plain; charset="utf-8" > > Hi all, > > I have made an out-of-tree module for a switch. But I am getting this error > while executing -> AttributeError: 'module' object has no attribute 'cc' > > Any suggestions on how to get rid of this. > > Thanks. > > Regards, > Ayan > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/42636025/attachment.html> > > ------------------------------ > > Message: 4 > Date: Mon, 15 May 2017 20:53:57 +0900 > From: Deepak Gautam <dpaak...@gmail.com> > To: discuss-gnuradio@gnu.org > Subject: [Discuss-gnuradio] How to write data periodically in file > sink > Message-ID: > <CAK=1b8rkOOnCaEsDHr3kVj8Dbd6vanBJ9gNgSa=pF8RmP00vjw@mail.gmail. > com> > Content-Type: text/plain; charset="utf-8" > > Currently i am working in the USRP using GNU Radio for my masters work. In > my transmitter side, i send data continuously from file source followed by > UHD Sink at the rate of 25 MSPS. In receiver side, I want to write the data > in every two/three seconds after receiving from receiver USRP. Meaning, > write data for 1 sec (25M samples), then dont write for next 2 second and > again write for 1 sec and so on. Is there any suggestion for this purpose. > I look forward for the resposne > > > Best Regards, > Deepak > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/1de62cf6/attachment.html> > > ------------------------------ > > Message: 5 > Date: Mon, 15 May 2017 14:02:08 +0200 > From: Moritz Luca Schmid <luca.moritz.sch...@gmail.com> > To: Deepak Gautam <dpaak...@gmail.com>, GNURadio Discussion List > <discuss-gnuradio@gnu.org> > Subject: Re: [Discuss-gnuradio] How to write data periodically in file > sink > Message-ID: <113e37ee-1a48-146d-3c0d-bb42dfaec...@gmail.com> > Content-Type: text/plain; charset="windows-1252"; Format="flowed" > > Hey Deepak, > > my first idea is to reconfigure the flowgraph. You could connect and > disconnect your source for the time, you want to write data in your file > sink and the time you don't want to. > > You can find infos about the flowgraphs operations here > <https://gnuradio.org/doc/doxygen/page_operating_fg.html>. > > > Best > > Luca > > > > On 15.05.2017 13:53, Deepak Gautam wrote: > > Currently i am working in the USRP using GNU Radio for my masters > > work. In my transmitter side, i send data continuously from file > > source followed by UHD Sink at the rate of 25 MSPS. In receiver side, > > I want to write the data in every two/three seconds after receiving > > from receiver USRP. Meaning, write data for 1 sec (25M samples), then > > dont write for next 2 second and again write for 1 sec and so on. Is > > there any suggestion for this purpose. I look forward for the resposne > > > > > > Best Regards, > > Deepak > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/496bfba3/attachment.html> > > ------------------------------ > > Message: 6 > Date: Mon, 15 May 2017 09:48:24 -0400 > From: Tom Rondeau <t...@trondeau.com> > To: GNURadio Discussion List <discuss-gnuradio@gnu.org>, > "usrp-us...@lists.ettus.com" <usrp-us...@lists.ettus.com> > Subject: [Discuss-gnuradio] DARPA Hackfest information > Message-ID: > <CA+SzT6gk--5bksmx4WAfBSMVKU2Sik3bpW7gx1f3 > 848bqly...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello software radio experts! > > Over the past couple of weeks, I've been traveling around to engage new > audiences for the DARPA SDR Hackfest coming up in November ( > http://darpahackfest.com/). The current promotion is to get people to the > teaming workshop coming up next Monday in Mountain View, CA ( > https://events.sa-meetings.com/ehome/index.php?eventid=237057&;). > > I wanted to make sure everyone on here knew about what we're doing here to > see about coming to join us and hopefully participate in the Hackfest. > > A lot of the people that I've been meeting on the road lately haven't even > heard of software radio, or if they have, they only have a passing > familiarity with it. It'll be important for them to have a way to connect > with experts and enthusiasts like you. While the Hackfest is about more > than just software radio, SDR is a big part of it, and this community's > abilities are going to be indispensable come November. > > Also coming up this weekend is the Bay Area Maker Faire. I'll be speaking > there about software radio and a bit about the Hackfest. > > Hope to see some of you there! > > Tom > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/a5b3932b/attachment.html> > > ------------------------------ > > Message: 7 > Date: Mon, 15 May 2017 10:43:45 -0400 > From: "West, Nathan" <n...@ostatemail.okstate.edu> > To: Ayan Chatterjee <ayane...@gmail.com> > Cc: GNURadio Discussion List <discuss-gnuradio@gnu.org> > Subject: Re: [Discuss-gnuradio] Attribute Error > Message-ID: > <CALkxiLL20+GTXU6cqJbuHRsvtgpDL2Y9=fE8TJTR > rd6e-8c...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > My guess is that you have a block you've named "cc". It's not linked > against some external library properly. > > On Mon, May 15, 2017 at 1:52 AM, Ayan Chatterjee <ayane...@gmail.com> > wrote: > > > Hi all, > > > > I have made an out-of-tree module for a switch. But I am getting this > > error while executing -> AttributeError: 'module' object has no attribute > > 'cc' > > > > Any suggestions on how to get rid of this. > > > > Thanks. > > > > Regards, > > Ayan > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/8e0da67e/attachment.html> > > ------------------------------ > > Message: 8 > Date: Mon, 15 May 2017 15:38:12 +0000 > From: Jessica Iwamoto <jessica.iwam...@aero.org> > To: Ben Hilburn <bhilb...@gnuradio.org> > Cc: "discuss-gnuradio@gnu.org" <discuss-gnuradio@gnu.org> > Subject: Re: [Discuss-gnuradio] Custom C++ blocks on E310 > Message-ID: > <SN1PR09MB100890FC9E1C6602D4490C8E9BE10@SN1PR09MB1008. > namprd09.prod.outlook.com> > > Content-Type: text/plain; charset="utf-8" > > Hi Ben, > > Here is some of the backtrace from the error. At the top level, the error > starts in the msg_connect function and it looks like it gets tripped up > reading something from memory when checking for a valid message port. > > #0 0xb635c67c in fetch_add (order=boost::memory_order_relaxed, v=1, > storage=@0x6: <error reading variable>) > at /home /prefix /sysroots/armv7ahf-vfp-neon- > oe-linux-gnueabi/usr/include/boost/atomic/detail/ops_gcc_atomic.hpp:100 > #1 fetch_add (order=boost::memory_order_relaxed, v=1, this=0x6) > at /home /prefix /sysroots/armv7ahf-vfp-neon- > oe-linux-gnueabi/usr/include/boost/atomic/detail/atomic_template.hpp:115 > #2 pmt::intrusive_ptr_add_ref (p=0x2) > at /home /prefix /src/gnuradio/gnuradio-runtime/lib/pmt/pmt.cc:69 > #3 0xb63e56e4 in intrusive_ptr (rhs=..., this=0xbeffec7c) > at /home /prefix /sysroots/armv7ahf-vfp-neon- > oe-linux-gnueabi/usr/include/boost/smart_ptr/intrusive_ptr.hpp:92 > #4 gr::flowgraph::check_valid_port (this=this@entry=0x10c578, e=...) > at /home /prefix /src/gnuradio/gnuradio-runtime/lib/flowgraph.cc:162 > #5 0xb63e95d0 in gr::flowgraph::connect (this=this@entry=0x10c578, > src=..., > dst=...) > at /home /prefix /src/gnuradio/gnuradio-runtime/lib/flowgraph.cc:503 > #6 0xb63f4c84 in gr::hier_block2_detail::msg_connect ( > this=this@entry=0x10c528, src=..., srcport=..., dst=..., dstport=...) > at /home /prefix /src/gnuradio/gnuradio-runtime/lib/hier_block2_ > detail.cc:198 > #7 0xb63f1b14 in gr::hier_block2::msg_connect (this=this@entry=0x0, > src=..., > srcport=..., dst=..., dstport=...) > at /home /prefix /src/gnuradio/gnuradio-runtime/lib/hier_block2.cc:104 > #8 0xb5cd6958 in _wrap_top_block_sptr_primitive_msg_connect__SWIG_1 ( > args=<optimized out>) > at /home /prefix_new/src/gnuradio/build-arm/gnuradio-runtime/ > swig/runtime_swigPYTHON_wrap.cxx:47551 > > Thanks, > Jessica > > From: Ben Hilburn [mailto:bhilb...@gnuradio.org] > Sent: Friday, May 12, 2017 1:35 PM > To: Jessica Iwamoto <jessica.iwam...@aero.org> > Cc: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] Custom C++ blocks on E310 > > Hey Jessica - > > The SIGBUS you are receiving indicates that there is likely some funniness > happening with memory addressing / access somewhere. Especially since your > test flowgraph is so simple, using GDB to get a backtrace might point you > to the offending code pretty quickly. For more details on how to do this, > check out this page on our Wiki: https://wiki.gnuradio.org/ > index.php/TutorialsDebugging#Expert_debugging_tools > > Have you tried this already? If so, can you share the backtrace? > > Cheers, > Ben > > > > On Thu, May 11, 2017 at 6:15 PM, Jessica Iwamoto <jessica.iwam...@aero.org > <mailto:jessica.iwam...@aero.org>> wrote: > Hi again, > > Attached is the code that I?m using if anyone would like to try to > replicate my issue. The test_msg_py.py file contains the custom python > block code for a simple message sink. The test_msg_impl.cc, > test_msg_impl.h, and test_msg.h files contain the custom C++ code for a > message sink. The test.py file contains a simple flowgraph that connects a > message strobe to my custom message sink blocks. When I run test.py with > either of the blocks on my desktop, it works correctly. However, when I run > test.py after cross compiling on the E310, it works correctly with the > test_msg_py block and produces the following error with the test_msg block: > Could not find port: in in: > system > Bus error > > Thanks, > Jessica > > From: Discuss-gnuradio [mailto:discuss-gnuradio-bounces+jessica.iwamoto< > mailto:discuss-gnuradio-bounces%2Bjessica.iwamoto>=aero....@gnu.org > <mailto:aero....@gnu.org>] On Behalf Of Jessica Iwamoto > Sent: Wednesday, May 10, 2017 9:53 AM > To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org> > Subject: [Discuss-gnuradio] Custom C++ blocks on E310 > > Hi all, > > I have built custom C++ blocks that work on my PC, but don?t work when > cross compiled for the E310. Specifically, I am trying to build a custom > C++ block with a message port and cross compile it for the E310. I am using > version 3.7.12 of GNU radio and the latest version of the SDK/toolchain for > the E310. I have built a simple message sink block with just a message > input port and put it in a flowgraph with a message strobe. My code runs > correctly on my PC but when I run it on the E310, I get the error: > Could not find port: msg in: > system > Bus error > > I am able to create custom python blocks with message ports and run them > on the E310 and my PC with no issues. Additionally, I am unable to create > custom C++ blocks with normal input and output streams on the E310 (the > program seg faults when I try to connect the custom block to another > block), but they run correctly on my PC. Any suggestions on what could be > causing this? > > Thanks, > Jessica > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org<mailto:Discuss-gnuradio@gnu.org> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.gnu.org/archive/html/discuss-gnuradio/ > attachments/20170515/0f27eb69/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > ------------------------------ > > End of Discuss-gnuradio Digest, Vol 175, Issue 16 > ************************************************* >
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