Re: [Discuss-gnuradio] Exception : Could not connect to ControlPort endpoint

This is definitely a case where the application is not nearly as user-friendly as it could be. gr-ctrlport-monitor takes two arguments: an address/hostname and a port. A controlport server must already be running at that host:port, otherwise there's nothing to connect to. On Thu, Mar 17, 2016 at 1

Re: [Discuss-gnuradio] (no subject)

Yeah, in my haste I mistakenly clicked on the mailing list which has the same icon as another of my contacts. Sent from Windows Mail From: Martin Braun Sent: ‎Thursday‎, ‎March‎ ‎17‎, ‎2016 ‎10‎:‎20‎ ‎PM To: Henry Barton Cc: discuss-gnuradio@gnu.org Congrats! ... Although this wa

Re: [Discuss-gnuradio] diminishing returns with increasing frequency offset

What's your sampling rate? The further you go towards the edge of your Nyquist zone, the more the anti-aliasing filter might be kicking in. Cheers, Martin On 03/17/2016 10:23 AM, tom x wrote: > Hi, > > My setup is a USRP N210 receiving from a transmitter sending a few > packets a second. (The pa

Re: [Discuss-gnuradio] How to create a python block

On Thu, 2016-03-17 at 11:41 -0700, Martin Braun wrote: > Current GRC on master allows you to type Python code directly into > the > flow graph to be executed as a block. Simply insert a 'Python block'. > This is a great help. Thank you. > M > > On 03/16/2016 02:34 PM, Dennis Glatting wrote:

Re: [Discuss-gnuradio] dive into gnu-radio

You are not in the same boat, by far. I'm an EE RF/MW hardware guy with zero formal software training (other than a FORTRAN undergrad course requirement; if that hints to my age). SDR is a rather new field that requires a LOT of cross discipline; it's software + radio. I have been messing with

Re: [Discuss-gnuradio] dive into gnu-radio

Hi Martijn: Two cents from me, a relative non-technical newbie, also a long-time amateur radio operator. My educational and professional background is in computing science and a bit of math. I first found gnuradio a few years ago, and had a similar experience to yours. I played around with i

[Discuss-gnuradio] Measuring execution time of functions within block returns strange results.

Ive been trying to determine which functions and/or code sections are the more computationally consuming within a work() function of a block. For doing this in ubuntu, which is my OS, almost all the references i found recommend to use clock_t clock() found in time.h. This function does not work wi

[Discuss-gnuradio] (no subject)

I studied enough for ch 1-2 and was able to get 100, 87, 100, and 95 on the 4 assignments.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] OFDM Training Sequence

Mateusz, the sync words are both for the Schmidl & Cox synchronization. Also, they're defined in the frequency domain, so you won't see the 'two identical parts here'. Rather, you skip every 2nd carrier. Cheers, Martin On 03/17/2016 04:47 AM, Mateusz wrote: > Hey, I do my Bachelor Thesis on OFDM

[Discuss-gnuradio] diminishing returns with increasing frequency offset

Hi, My setup is a USRP N210 receiving from a transmitter sending a few packets a second. (The packets are decoded with Bloessl's 802.15.4 PHY block if it matters) Let's say the transmitter is sending data on frequency f_t. I set the USRP to receive on f_t plus an offset f_o. The next block is a

Re: [Discuss-gnuradio] Data Formatting in GNURadio (WiFi)

Depends on your choice of types. Are you using floating point complex values, or fixed-point? M On 03/16/2016 05:07 PM, Abhinav Jadon wrote: > Hi, > I wrote a matlab scripts that generates the wifi packets for a given > payload. > The output is of the format > I dumped the output in a bin file.

Re: [Discuss-gnuradio] Pybombs 2: how to use "--config" parameter, how to disable "forcebuild" of gnuradio

To disable gnuradio's forcebuild from the command line, run: $ pybombs config --package gnuradio forcebuild False This will persistently disable forcebuilding for GNU Radio. With --config, you can only change the global config settings (i.e. the ones in the config: section in your config.yml fil

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

You *can* have 2 rx channels in an N210 (by means of dual DDC chains), but you probably haven't set the subdev spec appropriately (Something like 'A:0 A:0', depending on your daughterboard, check the UHD manual). Cheers, Martin On 03/18/2016 08:53 AM, Nikos Balkanas wrote: > Hi, > > You can have

Re: [Discuss-gnuradio] Massive underruns when transmitting with gr-ieee802-11 on an B210 USRP

On 03/17/2016 02:13 PM, Gonzalo Arcos wrote: -- Detected Device: B210 -- Operating over USB 2. UHD Warning: The total sum of rates (20.00 MSps on 1 channels) exceeds the maximum capacity of the connection. This can cause underruns (U). I refer you to the above messages^^^

Re: [Discuss-gnuradio] gr-ettus AttributeError

Nikos, Thank you for the reply! I did include the device3, and the problem turned out to be not installing gr-ettus correctly. I did not close the GRC when installing it, which I think may cause the prblem. After reinstalling it, it is ok now :) Zhihong 2016年3月18日星期五，Nikos Balkanas 写道： > Hi Zh

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

I stand corrected. Didn't even know that N210s took daugterboards :(​ Nikos On Fri, Mar 18, 2016 at 6:39 PM, Martin Braun wrote: > You *can* have 2 rx channels in an N210 (by means of dual DDC chains), > but you probably haven't set the subdev spec appropriately (Something > like 'A:0 A:0', dep

Re: [Discuss-gnuradio] lack of understanding the different formats to store samples

IQ files are binary files with the raw stream and no headers. Depending on sample resolution, these are complex pairs of either floats or bytes. Conversion of bytes to floats is given by the code: float f; byte b; f = (b - 127)/128; HTH Nikos On Wed, Mar 16, 2016 at 4:04 PM, Henry Barton wr

Re: [Discuss-gnuradio] Two Daughterboards

Ok thanks! Thought the channels referred to the TX/RX and RX2 on one daughterboard and not daughterboard_0 and daughterboard_1. It's interesting that up to 32 channels can be selected considering the limitation for 2 daughterboards, what am I missing? Best regards Simon On 2016-03-16 22:10,

[Discuss-gnuradio] How to create a python block

This is probably a dumb question but someone has to ask them... I have a run graph with c++ blocks: a receiver block, a transmitter block, and a manipulator block. I want to have the manipulator block editable from the run graph where the user can insert python code. Specifically: 1) The block h

[Discuss-gnuradio] Exception : Could not connect to ControlPort endpoint

Hello all, I am trying to run gr-ctrlport-monitor. I get this error when I lunch a command gr-ctrlport-monitor ~/.gnuradio$ gr-ctrlport-monitor Could not connect to ControlPort endpoint at None:9090.Exception socket.error: (32, 'Broken pipe') in > ignoredCan you help me please to fix this error

Re: [Discuss-gnuradio] How to create a python block

On Wed, 2016-03-16 at 16:58 -0400, James Humphries wrote: > Hi Dennis, > > Have you seen these: > > https://gnuradio.org/doc/doxygen/page_python_blocks.html > > and > > http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GN > U_Radio_in_Python > > They have some good info on how

Re: [Discuss-gnuradio] OOT- Modules version numbering scheme

This is a really good Q. I don't think modtool imposes/suggests anything, but that's probably worth changing. Can you please post a feature request on gnuradio.org? Thanks! Martin On 03/13/2016 04:33 AM, Volker Schroer wrote: > Are there recommendations how OOT- module versions should be numbere

Re: [Discuss-gnuradio] GSoC Interest in Project: Offline Analysis and Visualization Tools

Just in case anyone isn't yet convinced about the power and usefulness of inspectrum, check out this short demo video showing features in development: https://www.youtube.com/watch?v=9QyGKjt8zkE Mike ___ Discuss-gnuradio mailing list Discuss-gnuradio@g

Re: [Discuss-gnuradio] how to handle sources with variable bitrate

Thank you. I will look at it! Am 17.03.2016 19:03 schrieb "Francisco Albani" : > Hi Anselm. > > Go to http://lists.gnu.org/archive/html/discuss-gnuradio/ and search this > "Asynchronous source with zeros in between" > > You will find an email I wrote to this list asking a similar question. I'm > n

Re: [Discuss-gnuradio] Pybombs 2: how to use "--config" parameter, how to disable "forcebuild" of gnuradio

Yep, but you can always install the latest with pip. From the manual: If you do want to install the latest version from git, but still use pip, you run the following command: $ [sudo] pip install [--upgrade] git+https://github.com/gnuradio/pybombs.git M On 03/19/2016 12:44 PM, Piotr Krysik

[Discuss-gnuradio] Recorded Bluetooth Samples

Does anyone have recorded samples of bluetooth. I was working with gr-bluetooth. Some of the traces supplied with the package are ending abruptly without any output. So I was thinking to try with new traces. I don't have immediate access to my USRPs. So if anyone have them, please share. TIA S

Re: [Discuss-gnuradio] diminishing returns with increasing frequency offset

Hi, This previous post by me should give more info: https://lists.gnu.org/archive/html/discuss-gnuradio/2016-02/msg00286.html I've replaced the polyphase channelizer with one Frequency Xlating FIR filter for each channel. The first problem (described above) is that centering the filter too far fro

Re: [Discuss-gnuradio] How to create a python block

Current GRC on master allows you to type Python code directly into the flow graph to be executed as a block. Simply insert a 'Python block'. M On 03/16/2016 02:34 PM, Dennis Glatting wrote: > On Wed, 2016-03-16 at 16:58 -0400, James Humphries wrote: >> Hi Dennis, >> >> Have you seen these: >> >>

Re: [Discuss-gnuradio] dive into gnu-radio

Hi Kevin, Your link is good, but the exact title is "The scientist and engineer's giude to Digital Signal Processing" Coming from a similar background, it has been my favorite over the past 6 mos:) BR, Nikos On Fri, Mar 18, 2016 at 5:10 AM, Kevin McQuiggin wrote: > Hi Martijn: > > Two cents fr

Re: [Discuss-gnuradio] Pybombs 2: how to use "--config" parameter, how to disable "forcebuild" of gnuradio

The "--package" parameter seems to be added recently as pybombs installed with pip doesn't have this option yet. Best Regards, Piotr W dniu 19.03.2016 o 17:59, Piotr Krysik pisze: > Thank you Martin! > > > W dniu 18.03.2016 o 18:54, Martin Braun pisze: >> To disable gnuradio's forcebuild from the

Re: [Discuss-gnuradio] dive into gnu-radio

Sorry, typo "...as Marcus D. Leech points out..." --Patrick From: wp...@hotmail.com To: rfeng...@me.com; discuss-gnuradio@gnu.org; hup...@gmail.com Date: Wed, 16 Mar 2016 20:44:23 -0700 Subject: Re: [Discuss-gnuradio] dive into gnu-radio Hi Desmond, I have a similar CS background combined

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

Hi, You can have only 1 RX and 1 TX channel in a N210. You are asking for 2 RX channels in your flow. Runtime complains that he can access only 1 channel (Rx0). HTH, Nikos​ On Fri, Mar 18, 2016 at 5:39 PM, SUGANYA M wrote: > Hi All, > I am using GNU Radio Companion 3.7.5 and USRP N210. > When

[Discuss-gnuradio] OFDM tx rx error

Hi, I'm using the examples rx_ofdm.grc and tx_ofdm.grc together to transmit and receive packets over the air. Both work over a simulated channel, but when I actually transmit and receive over the air, I get the error: *"Detected a packet larger than max frame size (100 symbols)"* I saw the prev

[Discuss-gnuradio] OFDM tx rx error

Hi, I'm using the examples rx_ofdm.grc and tx_ofdm.grc together to transmit and receive packets over the air. Both work over a simulated channel, but when I actually transmit and receive over the air, I get the error: *"Detected a packet larger than max frame size (100 symbols)"* I saw the prev

Re: [Discuss-gnuradio] Handling of IQ files

Hi Henry, Here are a few open source applications you may find useful to reference to build your tool. rtl_power + heatmap.py (c/python) - Hard coded to use the RTL-SDRs https://github.com/keenerd/rtl-sdr/blob/master/src/rtl_power.c http://kmkeen.com/rtl-power/ rtl_power port that uses FFTW - h

Re: [Discuss-gnuradio] Handling of IQ files

Hi, With gr-fosphor you just playback the file and it loops until you stop it. Plot supports averages, max and mins. Since I/Q files do not contain the actual frequency, you'll have to calibrate the plot, which is 1 sample frequency wide. gr-fosphor runs on opencl. HTH Nikos ​ On Sat, Mar 19, 2

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

Yes, the N210 take daughterboards, and in fact, they only take one RX and one TX daughterboard, or a single "full-sized duplex board". Point is that with the Basic* and LF* boards, you can either use the I & Q signal lines combinedly as a single complex stream, or isolatedly as two real streams. Ho

Re: [Discuss-gnuradio] Handling of IQ files

On 03/19/2016 02:05 PM, Henry Barton wrote: So there’s no “read x samples, divide by y, do such-and-such, and you have a frequency-domain array” that I can average over time? Sent from Windows Mail Gnu Radio has various types of FFT blocks, filters, decimators, etc, etc.But there is no bi

Re: [Discuss-gnuradio] (no subject)

Congrats! ... Although this was probably meant for someone else. M On 17 Mar 2016 16:19, "Henry Barton" wrote: > I studied enough for ch 1-2 and was able to get 100, 87, 100, and 95 on > the 4 assignments. > > ___ > Discuss-gnuradio mailing list > Dis

Re: [Discuss-gnuradio] Handling of IQ files

So there’s no “read x samples, divide by y, do such-and-such, and you have a frequency-domain array” that I can average over time? Sent from Windows Mail From: Nikos Balkanas Sent: ‎Saturday‎, ‎March‎ ‎19‎, ‎2016 ‎1‎:‎31‎ ‎PM To: James Humphries Cc: Henry Barton, discuss-gnuradio@gnu.or

Re: [Discuss-gnuradio] Picking up RF cellular signals

Hi Meny, I imagine that's exactly what you need. Not only locate disaster victims, but also encourage them. You could always modify openbts code to not register or communicate with them, but what of the victim, thinking that it connected to a network and can't ask for help? BR, Nikos On Tue, Mar

Re: [Discuss-gnuradio] gr-gsm python problem "ImportError: No module named osmosdr"

Hello Uli, > - > ~/GSM/gr-gsm/apps$ ./grgsm_livemon > Traceback (most recent call last): > File "./grgsm_livemon", line 29, in > import osmosdr > ImportError: No module named osmosdr > -

Re: [Discuss-gnuradio] Handling of IQ files

Hi, I missed your second part. gr-fosphor is realtime, so It will follow whatever frequencies you have. Frequency hops show as frequency bands in a frequency spectrum. The frequency spread of a single plot, is your sampling frequency. HTH, Nikos​ On Sat, Mar 19, 2016 at 7:22 PM, James Humphries

Re: [Discuss-gnuradio] Handling of IQ files

Hi Henry, There is a script, read_complex_binary.m, that is included with gnuradio. You can use that with Octave or Matlab to read the I/Q recordings from a file as a time vector. -Trip On Sat, Mar 19, 2016 at 12:43 PM, Henry Barton wrote: > Is there any simple formula for plotting spectrum (f

[Discuss-gnuradio] gr-gsm python problem "ImportError: No module named osmosdr"

Hi fellows, I am relatively new in gnuradio that I took from github (version 3.7.9) Further I have taken osmocom and gr-osmosdr from github also libvolk-1.21. The installation worked fine. I am using Pyxthon-2.7 on BACKBOX-LINUX 4.2 kernel 3.19.0-51-generic. So far so good. My problem I havent

Re: [Discuss-gnuradio] Handling of IQ files

​Hi, Yes. gr-fosphor will do that for you. It's main takes as input a complex float I/Q file from usrp. HTH Nikos On Sat, Mar 19, 2016 at 6:43 PM, Henry Barton wrote: > Is there any simple formula for plotting spectrum (finding the intensity > of each frequency component, Hertz by Hertz) from

Re: [Discuss-gnuradio] Pybombs 2: how to use "--config" parameter, how to disable "forcebuild" of gnuradio

Thank you Martin! W dniu 18.03.2016 o 18:54, Martin Braun pisze: > To disable gnuradio's forcebuild from the command line, run: > > $ pybombs config --package gnuradio forcebuild False > > This will persistently disable forcebuilding for GNU Radio. > > With --config, you can only change the globa

Re: [Discuss-gnuradio] GSoC Proposal

Hi Daniel, The problem is I haven’t used GNU radio very much and also don’t understand its internals properly. Also like you said there is no proper task definition. I do want to participate but the problem here, is I frankly don’t know what to propose! Do I suggest new features, do I help other

[Discuss-gnuradio] Handling of IQ files

Is there any simple formula for plotting spectrum (finding the intensity of each frequency component, Hertz by Hertz) from IQ recordings? Specifically I need to know how to read an IQ file and somehow dissect clusters of samples. I’ve written programs that deal with large amounts of data from fi

Re: [Discuss-gnuradio] GSoC Proposal

Parth, have you decided if you want to apply or do you need more information? You are correct, the project description is not clear or complete. Ham radio is a hobby and in that spirit I don't want to tell you exactly what to do, I want you to make suggestions about goals and deliverables for th

Re: [Discuss-gnuradio] lack of understanding the different formats to store samples

This works! Thanks a lot! Ralph. >-Original Message- >From: Marcus Müller [mailto:marcus.muel...@ettus.com] >Sent: Wednesday, March 16, 2016 10:24 >To: Ralph A. Schmid, dk5ras; discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] lack of understanding the different formats to >store

Re: [Discuss-gnuradio] Massive underruns when transmitting with gr-ieee802-11 on an B210 USRP

What the the other Marcus intended to stress was that you're connected using USB __2__, which is too slow. Use a USB __3__ host controller. Sadly, not all work equally well. Generally, if you can, use an Intel host controller as integrated with many modern mainboards; with my oldish laptop, I'm hav

Re: [Discuss-gnuradio] dive into gnu-radio

On 03/16/2016 01:33 PM, Martijn Moeling wrote: > I feel there is a gap between the knowledge of the experts and the > information for newcomers. My questions have been answered pretty > quickly but the answers raise even more questions and confuse me. This is a common concern, but it's really, rea

Re: [Discuss-gnuradio] Lock onto QPSK signal

When I said “is it like selective fading” you wrote “That.” What does “That.” mean? >No way 24 MHz are going to be flat in frequency domain Does that mean that the transmitted result will not be smooth in a waterfall, but have high power and low power areas? I would expect a wideband SDR like

[Discuss-gnuradio] Need Mentor review of GSOC 2016 proposal

I will love that my proposal be reviewed by mentors,and I will be appreciate a lot, if I am told as many things wrong with it as possible especially in the project development part,and lots of suggestions too on ways to improve and optimized codes for the chosen project.I am a bit late,but I strong

[Discuss-gnuradio] Massive underruns when transmitting with gr-ieee802-11 on an B210 USRP

Hello, I have been working with the gr-ieee802-11 project for some time but always in software, and now i managed to acquire B210 USRPs to do some testing on air. I am testing the transmitter only, and sniffing from the medium with another pc that has a wi-fi card using TCPDump. I am experiencing

Re: [Discuss-gnuradio] dive into gnu-radio

> On Mar 16, 2016, at 3:36 PM, Desmond Crozby wrote: > > … > I saw this reading suggestion: > https://gnuradio.org/redmine/projects/gnuradio/wiki/SuggestedReading > , but > the list is extensive and grouped by topic, basi

Re: [Discuss-gnuradio] Measuring execution time of functions within block returns strange results.

Hi Gonzalo, On 16.03.2016 15:12, Gonzalo Arcos wrote: > Ive been trying to determine which functions and/or code sections are > the more computationally consuming within a work() function of a block. Don't do that yourself. There's the performance counters built into GNU Radio, which allow you to

[Discuss-gnuradio] OFDM benchmark optimal parameter

Hi, I am using ofdm/benchmark example with USRP N210 and CBX 40Mhz daughterboard. I tried to know optimal parameter(bandwidth, fft length, occupied tones, packet size) for maximum throughput and minimum error rates. How can I reach maximum throughput by adjusting parameter or modifying code ?

Re: [Discuss-gnuradio] Lock onto QPSK signa

Hi Henry, To add to Marcus's comments, there are two main methods in gnuradio for clock recovery of QPSK. in all cases you would need a costas loop block, and some way to recover symbol timing *before* costas (either a polyphase clock sync or an M&M). These are built into the psk demod block, a

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

Hi Nikos, Thanks for replying me. Now, I understood the reason for that error and corrected it and the execution goes well. Thank you, Suganya.M On Fri, Mar 18, 2016 at 9:23 PM, Nikos Balkanas wrote: > Hi, > > You can have only 1 RX and 1 TX channel in a N210. You are asking for 2 RX > channel

Re: [Discuss-gnuradio] benchmark_tx and rx : too many FALSE packet

Hi SangHyuk On 16.03.2016 02:21, SangHyuk Kim wrote: > Dear Nathan, > > I know QAM is the fastest modulation because it can carry more bits > per symbol. This is a reason why I use QAM modulation. > > As bits per symbol level is higher, bit error rates will be increased. > I expected it returns fe

Re: [Discuss-gnuradio] FFT Window function

The best way is probably to track the window in a separate variable and keep that around. Cheers, Martin On 03/18/2016 02:46 AM, Simon Olvhammar wrote: > Hi, > > I would like to read the current set window function from python, e.g. > blackman-harris, hanning. > There doesn't seem to be any fft.

[Discuss-gnuradio] FFT Window function

Hi, I would like to read the current set window function from python, e.g. blackman-harris, hanning. There doesn't seem to be any fft.get.window() command? Any other way? Best regards Simon ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http

Re: [Discuss-gnuradio] How to create a python block

Here's one example of a block implemented in python https://github.com/drmpeg/gr-paint/pull/4/commits/6f3356c9816402961e75082f0ab9aa5b5b0eb338 Perhaps you want something like Tim O'Shea's lambda blocks? https://oshearesearch.com/2015/05/23/gnu-radio-message-lambda-blocks/ Balint does strange any

Re: [Discuss-gnuradio] DOPPLER SHIFT

Hi Ernest, I saw your first mail, too, but I was really busy at that time. Now, what your error message indicates is that gpredict wasn't properly installed. Not having used that myself, I can't really be of much help, but you should first of all check that if you run a python2 prompt, "import gpr

[Discuss-gnuradio] Dev Call March: Moved to the 31st

Hi everyone, apologies for the late notice, but we have to move the dev call to the 31st (two weeks from now), since too many of the usual suspects are out and about today. We'll send out another announcement once it's closer. Cheers, Martin ___ Discu

Re: [Discuss-gnuradio] dive into gnu-radio

(oops, didn't reply list). Ahahaha. I was thinking of that block when I made my last comment. On Wed, Mar 16, 2016 at 8:40 PM, Anon Lister wrote: > Ahahaha. I was thinking of that block when I made my last comment. > > On Wed, Mar 16, 2016 at 8:34 PM, Timothée COCAULT < > timothee.coca...@gmail

Re: [Discuss-gnuradio] how to handle sources with variable bitrate

Hi, Have you tried using a FIFO block in your flow? There a few around and it seems to me it would normalize your flow. BR, Nikos On Thu, Mar 17, 2016 at 10:01 AM, Anselm Karl < anselmkarl.in...@googlemail.com> wrote: > Hi all, > > i want to transmitt a video stream with gnuradio and usrps. The

Re: [Discuss-gnuradio] declare_sample_delay cannot handle large delay?

I haven't looked at the code, but it maybe a problem if the sample delay is larger than the number of samples per work() call (because of pruning). This sounds like a bug -- can you please post an issue on gnuradio.org? Thanks! M On 03/14/2016 02:00 PM, Liyang Zhang wrote: > Hi all, > > I am pl

Re: [Discuss-gnuradio] diminishing returns with increasing frequency offset

Hi, Bastian, I tried doubling both, the sample rate to 8MHz and Omega to 4, but still no progress. The setup is simply the 802.15.4 PHY block connected to a USRP source, listening for an over the air transmission. Can you give some insight on how you picked the other MM Clock Recovery params? Is

Re: [Discuss-gnuradio] Sample rate of file souce/sink

Thank you Marcus and Ed. I finally had a chance to look back at my GRC flowgraph. Same data types in and out (complex for all blocks). And since I have been trying to figure this out for awhile, I've taken away all other blocks other than RTL-SDR Source -> File Sink and then File Sink -> throttle -

[Discuss-gnuradio] Draft Proposal GSoC: Offline Analysis and Visualization Tools

Hi Community, I have made my proposal for the subject GSoC idea. Please have a look and give feedback. Thanks for your time. https://github.com/UHaider/GSoC/blob/master/GSOC%20Proposal.pdf Regards, Usman ___ Discuss-gnuradio mailing list Discuss-gnurad

[Discuss-gnuradio] GSOC '16: Signal Intelligence (gr-sigint) draft proposal

Hi, I am just wondering if anyone could possibly take a look at my draft GSOC '16 proposal for the gr-sigint idea. https://www.dropbox.com/s/w2lf23kzj951rce/proposal.pdf?dl=1 Kind regards, Chris Richardson ___ Discuss-gnuradio mailing list Discuss-gnu

Re: [Discuss-gnuradio] how to handle sources with variable bitrate

Hi Anselm. Go to http://lists.gnu.org/archive/html/discuss-gnuradio/ and search this "Asynchronous source with zeros in between" You will find an email I wrote to this list asking a similar question. I'm not pasting a link here because I couldn't find the starting message; the thread is split in

Re: [Discuss-gnuradio] dive into gnu-radio

In reply to Kevin: Your path seems pretty similar to mine, I started a few years ago with a RTL dongle and got away with receiving in a few SDR programs available for Mac. After getting bored by that I installed gnu radio and seemingly quickly I got success with getting set-up what I needed. Si

[Discuss-gnuradio] Data Formatting in GNURadio (WiFi)

Hi, I wrote a matlab scripts that generates the wifi packets for a given payload. The output is of the format I dumped the output in a bin file. It is my understanding that the complex type file source reads the input (bin) file in a gr_complex data type format ie reading 32 bits from the bin file

Re: [Discuss-gnuradio] Sample rate of file souce/sink

Hi Jesse, this is not embarassingly simple! So, the point is that GNU Radio is really totally agnostic when it comes to sampling rates. For all the blocks, sample streams are really nothing but a sequence of numbers. Whether the signal was physically sampled at 1MS/s or 1S/s doesn't matter; the on

Re: [Discuss-gnuradio] Lock onto QPSK signal

Hi Henry, On 16.03.2016 15:24, Henry Barton wrote: > Wow, thanks for the comprehensive reply. You covered a lot of material > and I like how simple you make it. Did I? I pretty much went ahead and threw assumptions at you like "hey, that's a dot product, and you'll know how to deal with that" :) >

Re: [Discuss-gnuradio] Lock onto QPSK signal

Hi Henry, Interesting questions! On 16.03.2016 03:48, Henry Barton wrote: > > Hi, does anyone know of any good tutorials that explain how to lock > onto the clock of a QPSK signal and/or correlate? I know this is all > very simple in GNUradio, but I hope someone knows of a website or, > preferabl

Re: [Discuss-gnuradio] packetized data transmission

Hi, I'm using gnuradio/gr-digital/example/ofdm/benchmark_tx.py and benchmark_rx.py You can send and receive packet using the example with some parameters (bandwidth, frequency, etc.) Also similar example are on gnuradio/gr-digital/example/narrowband/benchmark_tx(rx).py. Two benchmark examples u

[Discuss-gnuradio] dive into gnu-radio

Hello, This might be a discussion that you have faced multiple times, but please bear with me until the end of this email. (I know how busy guys approach emails coming from the mailing list). I am a guy who recently got to know about gnu-radio, and it raised interest in me. To get into the topic,

Re: [Discuss-gnuradio] dive into gnu-radio

Hello Guys, I am really happy to see my question generated some quality discussion. It is encouraging and I hope other guys stumbling upon the post will contribute two cents or so. One thing I can do is to take your suggestions and start with the course materials and the textbooks. Then, classify

[Discuss-gnuradio] Grc runtime error "Reference Clock PLL failed to lock to GPSDO source"

Hi, Recently I have come across these flow runtime errors. This host flow (not rfnoc) will generate and execute fine, but after sometime this error appears (baudline is never started): -- [0/FIFO_0] sr_write(126, 00C1EA12, 0) Traceback (most recent call last): File "/home/nikos/Desktop/FFT.py", l

Re: [Discuss-gnuradio] dive into gnu-radio

Hi Desmond and everyone else, > With my knowledge the mechanics of > writing an OOT module and getting it to show up in GRC is fairly simple. > It's the knowledge of radio signals and digital signal processing where I > have the most difficulty. as a EE student I can recommend getting familiar w

[Discuss-gnuradio] how to handle sources with variable bitrate

Hi all, i want to transmitt a video stream with gnuradio and usrps. There are some examples on the web and i got it working with vlc. The problem is, that the playback is quite choppey. This is because the digital transmission over the usrps has a fixed rate but the encoded video has a variable r

Re: [Discuss-gnuradio] benchmark_tx and rx : too many FALSE packet

Hi SangHyuk On 16.03.2016 02:21, SangHyuk Kim wrote: > Dear Nathan, > > I know QAM is the fastest modulation because it can carry more bits > per symbol. This is a reason why I use QAM modulation. > > As bits per symbol level is higher, bit error rates will be increased. > I expected it returns fe

Re: [Discuss-gnuradio] How to create a python block

GNU Radio supports Python blocks out-of-the-box. You can use gr_modtool to create them, if you like. Also check out our qa codes for some examples (including message based blocks). Cheers, M On 03/16/2016 01:51 PM, Dennis Glatting wrote: > This is probably a dumb question but someone has to ask t

Re: [Discuss-gnuradio] diminishing returns with increasing frequency offset

It's strange but the only sampling rate that works is 4 MHz; Packets are not decoded when the sampling rate is set above this rate. Thanks, Tom On Thu, Mar 17, 2016 at 7:33 PM, Martin Braun wrote: > What's your sampling rate? The further you go towards the edge of your > Nyquist zone, the more

Re: [Discuss-gnuradio] RX channel 1 out of range for configured RX frontends

On 03/18/2016 02:33 PM, Marcus Müller wrote: Yes, the N210 take daughterboards, and in fact, they only take one RX and one TX daughterboard, or a single "full-sized duplex board". Point is that with the Basic* and LF* boards, you can either use the I & Q signal lines combinedly as a single compl

Re: [Discuss-gnuradio] lack of understanding the different formats to store samples

This sounds interesting; I too have been wondering how IQ files worked. I thought it must be alternating I bytes and Q bytes, or with >8-bit radios, I words and Q words. But maybe the packed byte system is right, since I can feed IQ recordings in WAV format directly into GNUradio without strippi

Re: [Discuss-gnuradio] Two Daughterboards

Simply drop down a USRP source with 2 channels. Cheers, Martin On 03/16/2016 02:08 PM, olvhammar wrote: > Hi, > > I would like to receive samples from two different daughterboards on the > same device (Ettus x310) using one GNURadio flowgraph. What is the > easiest way to accomplish this? Any ex

[Discuss-gnuradio] OFDM Training Sequence

Hey, I do my Bachelor Thesis on OFDM using GnuRadio. I am using the joint system created from tx_ofdm and rx_ofdm examples. In simulation I try to use a bigger fft. So far I have managed to send and receive for fft_len=128 and fft_len=256, BPSK modulation. I ask to help me understand the creat

[Discuss-gnuradio] Two Daughterboards

Hi, I would like to receive samples from two different daughterboards on the same device (Ettus x310) using one GNURadio flowgraph. What is the easiest way to accomplish this? Any examples? Best regards Simon ___ Discuss-gnuradio mailing list Discu

Re: [Discuss-gnuradio] dive into gnu-radio

Hi Desmond, I have a similar CS background combined with a youthful interest in radios from the distant past. I initially approached GNUradio with a similar attitude, i.e. it's just software, I can figure out what it does. But sadly that is not true, and as Martin Leech points out in a differe

Re: [Discuss-gnuradio] dive into gnu-radio

On 03/16/2016 08:34 PM, Timothée COCAULT wrote: I think there is cruel lack of explanation (not documentation) for the GNU Radio blocks. Reminds me of a Dylan Thomas piece "A Book with everything about wasps, except why." Gnu Radio is "embedded" in a number of different complex disciplines,

Re: [Discuss-gnuradio] GNU Radio Organizational Changes to Address Growth

Hi all - As I mentioned in the thread regarding the website updates, we recently discovered that changes to the gnuradio.org DNS caused some MX record issues, and many of you didn't actually receive the introduction e-mails that Johnathan and I sent out. If you didn't receive them and are interest

Re: [Discuss-gnuradio] gr-ettus AttributeError

To provide more information, all I did was: 1, switching UHD to RFNoC branch, cmake, make, make install 2, pulling down the gr-ettus (I have an old gnuradio installed), then cmake,make, make install. I think I might miss some steps, please help point it out :) On Thu, Mar 17, 2016 at 8:32 PM, Zhi

Re: [Discuss-gnuradio] lack of understanding the different formats to store samples

Exactly that's the case; the "normal" complex type of GNU Radio is really just 32bit floats IQIQIQIQ... ie. a single complex is nothing but two consecutive floating point numbers. WAV files come in all types, encodings and storage quantizations. Typically, the header/tail are much shorter than the

Re: [Discuss-gnuradio] How to create a python block

Hi Dennis, Have you seen these: https://gnuradio.org/doc/doxygen/page_python_blocks.html and http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GNU_Radio_in_Python They have some good info on how to setup your Python block. -Trip On Wed, Mar 16, 2016 at 4:51 PM, Dennis Glatti

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