Re: [Discuss-gnuradio] Demodulating CPFSK with Viterbi algorithm using gr-trellis

Thanks, Achilleas, Jan, Jeff for your responses. I think I understand the format now, and I managed to build the gr-trellis documentation, which does spell out answers for a lot of what I asked. I’ve abandoned making my own FSM since I can just use the CPM utilities in gr-trellis. However, I’m

Re: [Discuss-gnuradio] Fwd: GNU Radio Installation Error

Thanks for the help guys. The error has been solved. As Michael advised, I have done the same thing by going into the build directory and using "rm -rf" command to delete the build directory and reinstalled everything from the scratch. It worked. I guess I can approach later if I encounter any oth

Re: [Discuss-gnuradio] Problem with OOT module import

I figured out what part of the problem was. I added a few OOT blocks (gr_modtool add block1, block2, etc..) to my module and wrote the code for one of them, with the other two in default gr_modtool created states. I wanted to compile and test each one at a time, so I thought I could just comment ou

Re: [Discuss-gnuradio] Fwd: GNU Radio Installation Error

Hi, Thanks for the reply. Sorry to trouble you. If I perform the "rm -rf" command, I guess the entire contents in the build directory gets deleted right? So how exactly should I give the command. Like gnuradio/build $ sudo rm -rf? Kindly help as I am performing this command newly. Thanks, Dave On

Re: [Discuss-gnuradio] [USRP] tracking the transmission/receiving process

Hi Martin, Thank you. Now I see how the interaction between the host PC and USRP works. Actually, i am mostly interested in the transmission/sensing to/from the radio space (i.e. a radio application on PC sends command to the hardware for transmission/sensing). To my understanding, the application

Re: [Discuss-gnuradio] Scheduler and Tags - HELP!

David helped verify that this is the problem by commenting out the rounding code in propagate_tags(). Bug posted. If anyone else is seeing strange problems with tags that travel through rate changing blocks like stream_to_vector that operate on groups of items, this might be the cause. - Jeff

Re: [Discuss-gnuradio] Memory required to install Gnruadio

Thank you! And which is better for gnuradio: 32 bits or 64 bits? Cheers, 2015-09-10 16:29 GMT-03:00 Chris Kuethe : > My GNU Radio installation is about 2GB. My PyBOMBS directory with > sources and objects is 7.5GB. I have a couple of 128GB USB3 keys that > I use for dumping large sample files. S

Re: [Discuss-gnuradio] Memory required to install Gnruadio

My GNU Radio installation is about 2GB. My PyBOMBS directory with sources and objects is 7.5GB. I have a couple of 128GB USB3 keys that I use for dumping large sample files. So far none of my flowgraphs have caused me to hit swap with 8GB of memory. HTH, -C On Thu, Sep 10, 2015 at 12:17 PM, Pedro

Re: [Discuss-gnuradio] Demodulating CPFSK with Viterbi algorithm using gr-trellis

One quick correction on my previous email: every line corresponds to the current state and every column to an input. The entry is a number from 0 to O-1 (where O is the output alphabet cardinality). How this index is translated to an actual signal IS NOT PART OF THE FSM DEFINITION but par

[Discuss-gnuradio] Memory required to install Gnruadio

Hello, Until now, I was using a virtual machine to run and execute some flowgraphs, but now I'm going to install Ubuntu 14.04 LTS in my real machine and I'd like to know how much space is necessary to run Gnuradio without problems. My computer will be used only to work with gnuradio. There is no n

Re: [Discuss-gnuradio] Problem with OOT module import

Sorry, I'm using Ubuntu 14.04 LTS. On Thu, Sep 10, 2015 at 11:26 AM, Michael Dickens wrote: > What OS are you building on? > > On Thu, Sep 10, 2015, at 02:18 PM, Richard Bell wrote: > > I wrote an OOT module in cpp using GNU Radio 3.7.8, it shows up in GRC but > when I run it, I get the worst er

Re: [Discuss-gnuradio] Number of samples in a Sync block - clarification

Nicolas, The GNU Radio scheduler hands your block a certain number of samples everytime the blocks work function is called. The work function gets called many times over the course of a running flowgraph. To be technically correct, the scheduler tells your block how much memory it has to store out

Re: [Discuss-gnuradio] Problem with OOT module import

What OS are you building on? On Thu, Sep 10, 2015, at 02:18 PM, Richard Bell wrote: > I wrote an OOT module in cpp using GNU Radio 3.7.8, it shows up in GRC > but when I run it, I get the worst error known to mankind (in my > opinion): > > AttributeError: 'module' object has no attribute 'my_block

[Discuss-gnuradio] Problem with OOT module import

Hello all, I wrote an OOT module in cpp using GNU Radio 3.7.8, it shows up in GRC but when I run it, I get the worst error known to mankind (in my opinion): AttributeError: 'module' object has no attribute 'my_block' I've done this enough to where that usually means I've forgotten to execute sud

Re: [Discuss-gnuradio] Scheduler and Tags - HELP!

I think I found the problem, but not sure what to do about it. The block executor's tag propagation rounds "properly" when calculating offsets on a rate changing block. The result for stream_to_vector would be that the first half of the tags end up on one output item and the second half on the

Re: [Discuss-gnuradio] Demodulating CPFSK with Viterbi algorithm using gr-trellis

Sean, I just wanted to add to the previous answer: Indeed gr-trellis (and the fsm class specifically) has a built in constructor for generating the FSM corresponding to ANY CPM scheme. It only requires three parameters as explained in the comments in the file fsm.cc The constructed FSM is NOT bas

Re: [Discuss-gnuradio] problems with setting up RFNoC environment within PyBombs

Martin, Thank, I now see that there was a commented out line inside of the recipe for the rfnoc branch, so I made the change, installed UHD, and then reinstalled gnuradio. Lastly I installed gr-ettus and all seems to be happy (happy enough that things will load at least). If I setup one of my si

Re: [Discuss-gnuradio] Convolutional Code output does not match polynomial

Jan, Bob, might be worth opening a ticket for this. M On 10.09.2015 00:22, bob wole wrote: > Hey Jan, > > Thanks for your reply, you are correct about the bit shift being LSB. > So, I reversed the bit order of polynomials 1101101 to 1011011 and > 100 to 001 in MATLAB, Now the output of g

Re: [Discuss-gnuradio] Number of samples in a Sync block - clarification

On 10.09.2015 07:25, Nicolas Cuervo Benavides wrote: > 1. Where does the 4096 comes from? it is 2¹², which I don't recall being > 12 the size of one datatype that is involved in my function. It is > directly a value from scheduler and always the same? This value is pretty much random; 4096 works w

Re: [Discuss-gnuradio] Scheduler and Tags - HELP!

Thanks Jeff, The block is a sync block as it should take in one vector and pass out one vector, of the same size. The get_tags_in_range should be OK too. Again as its one vector coming in there is only one 'item' at a time too. tags = self.get_tags_in_range(0,self.nitems_read(0),self.nitems_rea

Re: [Discuss-gnuradio] Scheduler and Tags - HELP!

Do you have a forecast() function defined in your block? If not, the scheduler will call it with however many items it has available at the time. Tags would be propagated by stream_to_vector at the same time it copies items to its output buffer. Your block would need to specify the appropriate

Re: [Discuss-gnuradio] Scheduler and Tags - HELP!

Dear All, I have found more closely the issue. When the first burst is received, the block that does 'stream_to_vector', only copies the first half of the tags contained within the range of items. For subsequent bursts the correct number of tags are copied, but starting with the second half

[Discuss-gnuradio] Number of samples in a Sync block - clarification

Hi all, I've been trying to create a block that helps me comparing two signals, and in order to achieve that I want to take a snapshot of one of them to characterize it in terms of mean and maximum value. The inputs are always positive and greater than zero. That part of the code goes as follows:

Re: [Discuss-gnuradio] GRCon15 attendees

I'm on the road and don't have access to the actual numbers for some of them, but here is the basic breakdown of attendance. GRCon15: 1) New Developers Day: 128 2) Developers Conference: 232 GRCon14: 1) New Developers Day: 55 2) Developers Conference: 92 GRCon13: About 80 GRCon12: About 70 GRC

Re: [Discuss-gnuradio] gnuradio runtimeerror

ok,thank you so much At 2015-09-10 20:00:29, "Michael Dickens" wrote: Hi CDL - As you also replied on the USRP list & this is a UHD and/or Ettus Research issue, not a GR issue, we're moving the discussion to just that email group & leaving this one. You'll still get support, just there & not h

[Discuss-gnuradio] Evento cancelado: PSD in dBm/Hz jue 10 de Sept de 2015 11:00 - 12:00 (jhagui...@gmail.com)

BEGIN:VCALENDAR PRODID:-//Google Inc//Google Calendar 70.9054//EN VERSION:2.0 CALSCALE:GREGORIAN METHOD:CANCEL BEGIN:VEVENT DTSTART:20150910T16Z DTEND:20150910T17Z DTSTAMP:20150910T122811Z ORGANIZER;CN=Julio Hector Aguilar Renteria:mailto:jhagui...@gmail.com UID:7v56imaf7fp2s6hs6hugjmq...@g

Re: [Discuss-gnuradio] gnuradio runtimeerror

Hi CDL - As you also replied on the USRP list & this is a UHD and/or Ettus Research issue, not a GR issue, we're moving the discussion to just that email group & leaving this one. You'll still get support, just there & not here. - MLD On Thu, Sep 10, 2015, at 06:40 AM, cdl wrote: > i am using one

[Discuss-gnuradio] Scheduler and Tags - HELP!

Dear All, I have recently updated my GR from a prehistoric version. I am having some problems related to scheduling/tags. I have a Python block that takes in vectors of 7680 complex items. This is made up of 10 packets, each with 16 OFDM symbols with 48 data carriers each. I am sending just

Re: [Discuss-gnuradio] Demodulating CPFSK with Viterbi algorithm using gr-trellis

Hi Sean, Don't really know much about this but I played around with the FSM code a little. Outputs would read the same as the state transitions: if in state 0 and a 0 is received, output A, else output B Using the fsms generation routines, I got a different shape FSM than yours (higher outpu

[Discuss-gnuradio] gnuradio runtimeerror

i am using one usrp b200,to do a tx rx loopback,the tx connect to the rx when i exe the grc i got the error message -- Asking for clock rate 51.20 MHz... OK -- Asking for clock rate 51.20 MHz... OK -- Asking for clock rate 51.20 MHz... OK -- Asking for clock rate 51.20 MHz... OK UU

Re: [Discuss-gnuradio] Convolutional Code output does not match polynomial

Hey Jan, Thanks for your reply, you are correct about the bit shift being LSB. So, I reversed the bit order of polynomials 1101101 to 1011011 and 100 to 001 in MATLAB, Now the output of gnuradio and MATLAB and my dry run matches. I am wondering why they did implementation like this? Any ad

Re: [Discuss-gnuradio] 回复: gnuradio error

Hi CDL! Does the same error occur with the B200 powered with the external power supply? What USB controller are you using (if you're using linux, "lscpi|grep -i usb" will tell you)? Best regards, Marcus On 10.09.2015 04:04, Michael Dickens wrote: > Please reply on-list for the best assistance; no

Re: [Discuss-gnuradio] Fwd: GNU Radio Installation Error

Dave, please refrain from asking for help on mails just because you did not receive answer within 5 hours. Best regards, Marcus On 10.09.2015 03:34, Rama V wrote: > > Anyone. Kindly help with the above error. > > Regards, > Dave > > On Sep 9, 2015 4:46 PM, "Rama V" >

Re: [Discuss-gnuradio] making local filter with more than "noutput_items" output length

Hi Ratnesh, what type is d_Shfilter? Best regards, Marcus On 09.09.2015 20:43, ratnesh kumbhkar wrote: > Hi all, > I am trying to make an out-of-tree module using sync block. In which I > want to make a local filter, i.e. output of this filter is not > connected to an output port, but to be stor

Re: [Discuss-gnuradio] Display the values of Frequency, Amplitude, FFT

Hi Mathias, excuse my indiscretion, but why are you sending mails from Julio's mail account? I did not quite get your question; I assume you want to show text in these field? In that case, use a variable in the "text" property of the GUI text box, and set that variable, e.g. using a probe. It mig