[Discuss-gnuradio] Channel Estimation in benchmark OFDM Code
Dear All, Does the benchmark OFDM Code perform Channel synchronization ? I am moving through the code however I can't seem to get the part where this is done ? Can anyone give any pointers regarding this ? The number of pilots ? Estimation technique used ? Best Regards, -- Yahya Ezzeldin http://www.ieee.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] What are coase freq. estimation and fine freq. estimation in OFDM? Did the implementation in gnuradio follow the 802.11 standard?
On Tue, Apr 16, 2013 at 12:22:28AM +0800, Yingjie Chen wrote: Thanks for you reply, Tom. Hm, I guess we both have a beard and wear glasses. So what you mean is that gnuradio only use one symbol to do the time frequency (including coarse and fine)synchronization, as well as CSI estimation, is that right? The old stuff yes, the new stuff, if you like. You also said the coarse freq. offset estimation is slight different. Can you show me some references only related to coarse freq. offset estimation in gnuradio. Thanks in advance. digital_ofdm_frame_acquisition.cc or digital_ofdm_chanest_vcvc.cc. Grepping for 'coarse' would have helped you! MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpsNqVMvskvr.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Channel Estimation in benchmark OFDM Code
On Tue, Apr 16, 2013 at 08:21:54AM +0200, Yahya Ezzeldin wrote: Does the benchmark OFDM Code perform Channel synchronization ? I am moving through the code however I can't seem to get the part where this is done ? Can anyone give any pointers regarding this ? The number of pilots ? Estimation technique used ? Hi Yahya, check out my previous email on OFDM. Also, have a look at the blocks in gr-digital/lib. MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpjHcRXg8S4s.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Some new 802.15.4 stuff
Hi Bastian, I am newbie to USRP and Gnuradio. I did make and make install of your project. But when I opened the rx.grc, I got some errors. Could you please take a look what is the cause for that? Thanks in advance. Welcome to GNU Radio Companion 3.6.4.1 Loading: /home/pdv/work/usrp/gr-ieee802-15-4/examples/rx.grc Error: Block key ieee802_15_4_mac_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_rime_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_packet_sink not found in Platform - grc(GNU Radio Companion) Error: Block key blocks_file_sink not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_wireshark_connector not found in Platform - grc(GNU Radio Companion) Error: Connection between digital_clock_recovery_mm_xx_0(0) and ieee802_15_4_packet_sink_0(0) could not be made. sink block id ieee802_15_4_packet_sink_0 not in block ids Error: Connection between ieee802_15_4_packet_sink_0(out) and ieee802_15_4_mac_deframer_0(pdu in) could not be made. source block id ieee802_15_4_packet_sink_0 not in block ids Error: Connection between ieee802_15_4_mac_deframer_0(pdu out) and ieee802_15_4_rime_deframer_0(pdu in) could not be made. source block id ieee802_15_4_mac_deframer_0 not in block ids Error: Connection between ieee802_15_4_rime_deframer_0(pdu out) and gr_socket_pdu_0(pdus) could not be made. source block id ieee802_15_4_rime_deframer_0 not in block ids Error: Connection between ieee802_15_4_packet_sink_0(out) and ieee802_15_4_wireshark_connector_0(in) could not be made. source block id ieee802_15_4_packet_sink_0 not in block ids Error: Connection between ieee802_15_4_wireshark_connector_0(0) and blocks_file_sink_0(0) could not be made. source block id ieee802_15_4_wireshark_connector_0 not in block ids Done Showing: /home/pdv/work/usrp/gr-ieee802-15-4/examples/rx.grc Dingwen 2013/4/15 Bastian Bloessl bastian.bloe...@uibk.ac.at Hi all, I played a bit around with the 802.15.4 blocks [1]. Maybe someone is interested. The changes are: - It has a transceiver flow graph. (That was really easy with the new PDU to tagged stream block) - annotate LQI value in dict of PDUs - CRC check - Wireshark Connector. You can write received packets in a pcap file, that can be read by Wireshark, which has 802.15.4 dissectors. - and the coolest thing: the whole encoding is now done with standard GNU Radio blocks. This includes pulse shaping and the byte to chunk to chip to symbol mapping. It's really cool what you can do with plain GNU Radio. I tested interoperability it with TelosB motes. I guess it compiles only on Linux due to the gettimeofday(?) call. Maybe I messed up my installation as I tried the next branch and didn't uninstall it cleanly. Now some block names are appended with '(old)'. I hope the flow graphs work nevertheless. Have fun, Bastian [1] https://github.com/bastibl/gr-**ieee802-15-4https://github.com/bastibl/gr-ieee802-15-4 -- Dipl.-Inform. Bastian Bloessl Institute of Computer Science University of Innsbruck, Austria Phone: +43 512 507-53288 / Fax: -53079 http://ccs.uibk.ac.at/~**bloessl/ http://ccs.uibk.ac.at/~bloessl/ __**_ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/**listinfo/discuss-gnuradiohttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] ISWCS 2013 Call for Demonstrations
Call for Demonstrations for ISWCS 2013 The Tenth International Symposium on Wireless Communication Systems (ISWCS) to be held in Ilmenau, Germany, 27-30 August 2013 will offer the invaluable opportunity to demonstrate novel, innovative and original research in the area of Software Defined Radio/Cognitive Radio as well as Future Internet technologies. The goal of this demonstration session is to provide an opportunity to bridge the gap between both research fields and to connect world-wide technical researchers in both areas. Therefore, the session will welcome contributions presenting novel and innovative demonstrations in one or both of the above mentioned areas of interest. Submission Requirements: The submissions should include an extended abstract of two pages in accordance with the IEEE author guidelines. The authors should explicitly state what will be demonstrated to the ISWCS audience, and how the attendees will be able to interact, enjoy, and experiment. All submissions must be submitted through EDAS. The proposals will be evaluated by the ISWCS 2013 demo review committee based on the following criteria: – Relevance and novelty of the topic: How important and novel is the proposed demonstration to the community? – Interactivity and originality of the idea: What can the conference attendees observe and how can they interact with the proposed demo? The extended abstracts of accepted demonstrations will be included in the proceedings of ISWCS 2013 and in the IEEE Xplore database. The abstract should include a full list of authors with complete affiliations. At least one author of each accepted demo is required to register and present the demo at the conference. Important Links: - Conference website: http://www.iswcs2013.org - EDAS submission: https://edas.info/newPaper.php?c=13295track=32879 Important Dates: – Demo proposal submission deadline:May 8, 2013 – Notification of acceptance: May 29, 2013 – Camera-ready version of demo papers: June 24, 2013 Demonstration Chairs: - – Andre Puschmann, Ilmenau University of Technology, Germany – Thomas Volkert, Ilmenau University of Technology, Germany Demo Review Committee: -- – Martin Braun, Karlsruhe Institute of Technology, Germany – Paul Sutton, CTVR, Trinity College, Ireland – Joseph Gaeddert, Virginia Tech, USA – Tomaž Šolc, Jožef Stefan Institute, Slovenia – Oliver Waldhorst, Karlsruhe Institute of Technology, Germany – Paul Müller, University of Kaiserslautern, Germany – Thomas Magedanz, TU Berlin/Fraunhofer FOKUS, Germany – Thomas Dreibholz, Simula Innovation AS, Norway – Florian Liers, Ilmenau University of Technology, Germany -- Andre Puschmann Ilmenau University of Technology, Integrated Communication Systems Group Cognitive Radio Network Group Phone: +49 3677 69-4132, Fax: +49 3677 69-1614 Email: andre.puschm...@tu-ilmenau.de, Web: http://www.tu-ilmenau.de/crng Office: Zuse Building, corridor f, room 1071 PGP/GnuPG key: 2C734140 fingerprint: 546F F71F 3185 0388 94C3 FA7A DDE6 00B9 2C73 4140 ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Some new 802.15.4 stuff
Hey Brian, first, thank you for your comment. On 04/15/2013 03:37 PM, Brian Padalino wrote: I think it would be great for the community to get a rundown of the entire standard itself, modulation/demodulation within GNU Radio, how you handled frequency/sampling offsets, etc. I thought about that and as it is all-supervisors-are-at-infocom-week, I tried something... I made an IPython notebook, and reimplemented the transmitter iterative (i.e. non-stream) in python in the browser. I annotated it with text and plots and pictures. It leads the reader step by step through the whole encoding process until we are at complex baseband representation. Than it writes the samples into a file. (The whole stuff happens in the browser, or is controlled through the browser). I included a script, that creates a Linux pipe and starts the file_tx program, which is part of the UHD library. So the samples are really transmitted. I can receive the signal that I send in the browser with my TelosB mote. It's somehow funny and you can look at the signal in every stage of the encoding process. It's a bit hard to describe and maybe some don't have ipython installed. So I made a really, really ugly video [1], but maybe it helps to see what going on. You can have a look at the notebook here [2]. It is a Gist rendered by the notebook viewer. You can download the Gist [3] and run it interactively in your browser. The whole stuff is not prove read, contains a lot of errors, is just 4 fun and should just show the idea. Best, Bastian [1] http://www.youtube.com/watch?v=OKeRCZGHi1E [2] http://nbviewer.ipython.org/5394322 [3] https://gist.github.com/bastibl/5394322 -- Dipl.-Inform. Bastian Bloessl Institute of Computer Science University of Innsbruck, Austria Phone: +43 512 507-53288 / Fax: -53079 http://ccs.uibk.ac.at/~bloessl/ ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Open Source LTE Deployment (OSLD)
Dear open-source community, We'd like to announce the availability of an open-source LTE downlink transmitter and receiver waveform running on the SDR framework ALOE: http://flexnets.github.io/aloe/. The system features: - Downlink channels: PDSCH, PBCH, PCFICH and PDCCH. - End-to-end PHY processing latency of 8 ms, to be further reduced. - UDP sink/source modules. - Waveform development and verification tools. - And many more... Thanks for your interest, Ismael Gomez OSLD Developer ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Values graph fft
hi all I want to save the values that make up the graph of the FFT in a text file (fft_window.py), but when I print the values shown ([-82, -112 -, 100, -93, -103]) , not all the values of the FFT. someone could get all values? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Some new 802.15.4 stuff
Hello Dingwen, On 04/16/2013 11:24 AM, Dingwen Yuan wrote: Welcome to GNU Radio Companion 3.6.4.1 Loading: /home/pdv/work/usrp/gr-ieee802-15-4/examples/rx.grc Error: Block key ieee802_15_4_mac_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_rime_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_packet_sink not found in Platform - I tried to reproduce the error, but without success. I searched in my local installation path and assured that I really uninstalled everything. Then, I did 'git clean -xdf' and 'git reset --hard' in the git repo and installed everything again. I guess the problem is that GRC can't find the XML files. Where do you have your other GRC blocks installed? Was the installation really successful? I'm afraid you are the first tester :) So maybe its a CMake bug and the files are not placed where they are supposed to be placed. Best, Bastian ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Some new 802.15.4 stuff
Hi Bastian, I am using Ubuntu 12.04. I first try to compile the gnuradio with build-gnuradio script. But the system crashed after starting making gnuradio. So later I use the precompiled gnuradio and uhd directly from ettus. It seems that the gnuradio is install in the folder /usr/local/lib/python2.7/dist-packages. I did compile your gr-ieee802-15-4 and everything works all right. After sudo make install, it is installed in /usr/share/gnuradio. So I think the problem is due to the path setting. I will try to set the path properly. Thanks! Dingwen 2013/4/16 Bastian Bloessl bastian.bloe...@uibk.ac.at Hello Dingwen, On 04/16/2013 11:24 AM, Dingwen Yuan wrote: Welcome to GNU Radio Companion 3.6.4.1 Loading: /home/pdv/work/usrp/gr-**ieee802-15-4/examples/rx.grc Error: Block key ieee802_15_4_mac_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_rime_deframer not found in Platform - grc(GNU Radio Companion) Error: Block key ieee802_15_4_packet_sink not found in Platform - I tried to reproduce the error, but without success. I searched in my local installation path and assured that I really uninstalled everything. Then, I did 'git clean -xdf' and 'git reset --hard' in the git repo and installed everything again. I guess the problem is that GRC can't find the XML files. Where do you have your other GRC blocks installed? Was the installation really successful? I'm afraid you are the first tester :) So maybe its a CMake bug and the files are not placed where they are supposed to be placed. Best, Bastian __**_ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/**listinfo/discuss-gnuradiohttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Dev Call April: Thursday, April 18
Hi everyone, as usual, the dev call is on the third Thursday of the month, which is this Thursday, April 18. Europe is now also on daylight savings time, so the time is back to 10 AM Pacific, 1 PM Easter, 19:00 CEST. Topics include: - Wrapping up 3.6 - State of 3.7 - GSoC As usual, the instructions to connect are available on http://gnuradio.org/redmine/projects/gnuradio/wiki/DevelopersCalls. If you want to tune in, or even just listen, *please* make sure your SIP client is installed before. We know the technology isn't great, but right now it's all we have. If you've never done this, invest at least 30 minutes before the call to get your client running. The call is also happening in chat, so you can just point your IRC client to #gnuradio and at least see what topics we're discussing. MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpaRCNjFripV.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] What are coase freq. estimation and fine freq. estimation in OFDM? Did the implementation in gnuradio follow the 802.11 standard?
Hi Martin, I am not able to find the file digital_ofdm_frame_acquisition.cc or digital_ofdm_chanest_vcvc.cc in my gnuradio. I have gnuradio 3.6.2 installed on my ubuntu 10.04. I tried searching in /usr/local/share/gnuradio/examples/digital/ofdm. But there were no c++ files. The find command also doesn't show it. where should i look for that c++ file. On Tue, Apr 16, 2013 at 12:49 PM, Martin Braun (CEL) martin.br...@kit.eduwrote: On Tue, Apr 16, 2013 at 12:22:28AM +0800, Yingjie Chen wrote: Thanks for you reply, Tom. Hm, I guess we both have a beard and wear glasses. So what you mean is that gnuradio only use one symbol to do the time frequency (including coarse and fine)synchronization, as well as CSI estimation, is that right? The old stuff yes, the new stuff, if you like. You also said the coarse freq. offset estimation is slight different. Can you show me some references only related to coarse freq. offset estimation in gnuradio. Thanks in advance. digital_ofdm_frame_acquisition.cc or digital_ofdm_chanest_vcvc.cc. Grepping for 'coarse' would have helped you! MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Regards Karan Talasila ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] What are coase freq. estimation and fine freq. estimation in OFDM? Did the implementation in gnuradio follow the 802.11 standard?
On Tue, Apr 16, 2013 at 06:17:56PM +0530, Karan Talasila wrote: I am not able to find the file digital_ofdm_frame_acquisition.cc or digital_ofdm_chanest_vcvc.cc in my gnuradio. I have gnuradio 3.6.2 installed on my ubuntu 10.04. I tried searching in /usr/local/share/gnuradio/examples/ digital/ofdm. But there were no c++ files. The find command also doesn't show it. where should i look for that c++ file. Hi Karan, there's no signal processing files in 'examples'. I recommend the introductory pages to GNU Radio on the wiki. On Linux, the 'find' command will help. Such as: src/gnuradio % find gr-digital -name digital_ofdm_frame_acquisition.cc gr-digital/lib/digital_ofdm_frame_acquisition.cc There it is. MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpMFloI5chsA.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] linker problem with c++ application on next branch
On Mon, Apr 15, 2013 at 7:34 PM, Johnathan Corgan johnat...@corganlabs.com wrote: On Mon, Apr 15, 2013 at 8:40 AM, Alexandru Csete oz9...@gmail.com wrote: As far as I can see libgnuradio-pmt is a new library and it does not have it's own package, so I assume a -lgnuradio-pmt is missing in the pkg-config file of one of the other packages, perhaps gnuradio-runtime. Thanks, I'll fix this right away. Hi Johnathan, I saw you made the update, however, it seems this wasn't enough as I still get the same build error. This time I also noticed a problem while building gnuradio so maybe the problem is somewhere else. Here is what I do (xubuntu 12.10 64 with gcc 4.6 and 4.7 installed): export CC=/usr/bin/gcc-4.6 export CXX=/usr/bin/g++-4.6 cmake -DCMAKE_INSTALL_PREFIX=/opt/gnuradio/v3.6.4.1-1146-gae625607-next -DENABLE_GR_ATSC=OFF -DENABLE_GR_CTRLPORT=ON .. Then I type make and it builds fine, however, if I just type make again (or make install for that matter) I get an error: alc@PC1927:~/sdr/gnuradio/v3.6.4.1-1146-gae625607-next/build2$ make [ 5%] Built target volk [ 5%] Built target test_all [ 5%] Built target volk_profile [ 6%] Built target pygen_python_volk_modtool_dad04 [ 6%] Built target pygen_python_volk_modtool_f7e51 [ 6%] Built target doxygen_target [ 6%] Built target pmt_generated Linking CXX shared library libgnuradio-pmt-3.7git.so make[2]: *** [gnuradio-runtime/lib/libgnuradio-pmt-3.7git.so.0.0.0] Error 1 make[1]: *** [gnuradio-runtime/lib/CMakeFiles/gnuradio-pmt.dir/all] Error 2 make: *** [all] Error 2 alc@PC1927:~/sdr/gnuradio/v3.6.4.1-1146-gae625607-next/build2$ Subsequent attempts at make are OK, but my application still fails to link. My application (https://github.com/csete/stlm/tree/master/receiver) is also built using cmake. I tried forcing it to gcc 4.6 instead of the default 4.7. It will then give a symbol name in the error message: /usr/bin/ld: CMakeFiles/strx.dir/strx/strx_source_c_impl.cpp.o: undefined reference to symbol 'pmt::intern(std::basic_stringchar, std::char_traitschar, std::allocatorchar const)' /usr/bin/ld: note: 'pmt::intern(std::basic_stringchar, std::char_traitschar, std::allocatorchar const)' is defined in DSO /opt/gnuradio/v3.6.4.1-1146-gae625607-next/lib/libgnuradio-pmt-3.7git.so.0.0.0 so try adding it to the linker command line /opt/gnuradio/v3.6.4.1-1146-gae625607-next/lib/libgnuradio-pmt-3.7git.so.0.0.0: could not read symbols: Invalid operation collect2: ld returned 1 exit status make[2]: *** [strx] Error 1 make[1]: *** [CMakeFiles/strx.dir/all] Error 2 make: *** [all] Error 2 alc@PC1927:~/sdr/stlm.git/receiver/build$ Alex ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Dev Call April: Thursday, April 18
Just a suggestion for those interested in GSoC: Since a main aspect of GSoC is to get people into the community, this would be a suitable place to 'meet' some of the developers. We probably won't be discussing details of GSoC projects, but you would get an idea of the 'bigger picture'. MB On Tue, Apr 16, 2013 at 02:31:00PM +0200, Martin Braun (CEL) wrote: Hi everyone, as usual, the dev call is on the third Thursday of the month, which is this Thursday, April 18. Europe is now also on daylight savings time, so the time is back to 10 AM Pacific, 1 PM Easter, 19:00 CEST. Topics include: - Wrapping up 3.6 - State of 3.7 - GSoC As usual, the instructions to connect are available on http://gnuradio.org/redmine/projects/gnuradio/wiki/DevelopersCalls. If you want to tune in, or even just listen, *please* make sure your SIP client is installed before. We know the technology isn't great, but right now it's all we have. If you've never done this, invest at least 30 minutes before the call to get your client running. The call is also happening in chat, so you can just point your IRC client to #gnuradio and at least see what topics we're discussing. -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpFFU43AT6NT.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] What are coase freq. estimation and fine freq. estimation in OFDM? Did the implementation in gnuradio follow the 802.11 standard?
Martin, Thanks I got it. I am planning to update my ubuntu to 12.04 and then install latest version of gnuradio. should i manually delete all the existing folders and run the installation or does build-gnuradio take care of that. On Tue, Apr 16, 2013 at 6:35 PM, Martin Braun (CEL) martin.br...@kit.eduwrote: On Tue, Apr 16, 2013 at 06:17:56PM +0530, Karan Talasila wrote: I am not able to find the file digital_ofdm_frame_acquisition.cc or digital_ofdm_chanest_vcvc.cc in my gnuradio. I have gnuradio 3.6.2 installed on my ubuntu 10.04. I tried searching in /usr/local/share/gnuradio/examples/ digital/ofdm. But there were no c++ files. The find command also doesn't show it. where should i look for that c++ file. Hi Karan, there's no signal processing files in 'examples'. I recommend the introductory pages to GNU Radio on the wiki. On Linux, the 'find' command will help. Such as: src/gnuradio % find gr-digital -name digital_ofdm_frame_acquisition.cc gr-digital/lib/digital_ofdm_frame_acquisition.cc There it is. MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Regards Karan Talasila ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GSoC 2013: Vector-network analyzer
Greetings! My name is Marcelo Galvão Póvoa, a Computer Science graduate student from UNICAMP, Brazil. I am interested in participating in GSoC and the Vector-network analyzer project idea caught my attention. As some background about my experience, I worked as intern in a small Design House company that develops DTV demodulators using hardware and software via DSP solutions. I learned from experience how a signal analyzer can be useful in the development process. :) I am not familiar with GNU Radio, but hopefully I know about the main theoretical concepts that go along with it. I have just built the platform and I will take at look at the tutorials. On the other hand, I can code in both C++ and Python but have never used Qt, but I guess it's not hard to learn. I have a few questions about the project: - Is there any vector analyzer tool (maybe external) already available to be used with GNU Radio? - I see that some wanted features are listed on the wiki, but is the project supposed to be based on some reference design? - Is it feasible to do this project without RF hardware but just via simulation? Of course, someone else could also perform tests in a real scenario and report back. I am looking forward to your reply. Marcelo ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] gnuradio bug tracker update
Hi all, This is an update to let everyone know what exciting bugs are available to be fixed in the bug tracker (http://gnuradio.org/redmine/issues). Missing -mfpu=neon in CFLAGS/CXXFLAGS when building for ARM and NEON is supported but not gcc's default (Although if I understand Philip's comment this is a problem with CMake?) http://gnuradio.org/redmine/issues/526 The audio source block is not implemented for gr-audio windows. It is not obvious if we even need this or if portaudio is sufficient. If anyone has used gnuradio on windows with audio it would be lovely if they could look into/make a decision on this. http://gnuradio.org/redmine/issues/521 throwing an exception inside gr_hier_block2 ctor leads to a crash at exit http://gnuradio.org/redmine/issues/528 Bug 532: runtime_error without LANG=C http://gnuradio.org/redmine/issues/532 Implement variable number of inputs and outputs for hierarchical blocks. This would be a really useful feature, but will be non-trivial to add. http://gnuradio.org/redmine/issues/390 Finally there are a few GRC issues which are assigned to me and Josh, but I'm pretty confident neither of us would mind, if someone else assigned themselves instead. http://gnuradio.org/redmine/issues/519 http://gnuradio.org/redmine/issues/489 http://gnuradio.org/redmine/issues/487 Thanks in advance, Ben ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
