[Discuss-gnuradio] An Old Idea for GSoC 2018

? If not, I would rather work on it at my leisure than for GSoC as the idea would be less likely to be accepted. Regarding the hardware, my university laboratory has several USRPs and I can use them. Best regards, Sakthivel Velumani ___ Discuss-gnuradio

[Discuss-gnuradio] Carrier sync for OQPSK

Hi all, When I try to test my block in GRC, the execution stops within a second without any error message. I couldn't find the bug in my code so I would be grateful if someone could help. The code is accessible here

[Discuss-gnuradio] fir_filter_ccc for array output

Hi all, In the block that I am working on, I want to filter an array of samples. If I am using fir_filter_ccc, do I have to use 'filter' method in a loop to generate all the output samples or is there an efficient way to perform the filtering in a single line of code? Regards, Sakthivel

[Discuss-gnuradio] gr-mimo Status

Hi all, I read about gr-mimo in old ideas list of GSoC and further search in the mailing list archive revealed that it was an idea from Yizirui Zhou for 2014 GSoC. I am a graduate student in Telecommunication engineering and would love to implement or improvise (I have some new ideas like DoA

Re: [Discuss-gnuradio] Segfault in Polyphase clock sync block

Hi Daniel, The pfb block sets history() to ensure sufficient amount of input items are available. Can you provide information on arguments passed to the pfb block like sps, taps and no. of filters? Best, Sakthivel On Sun, Jan 21, 2018 at 11:39 AM, Daniel Estévez wrote: >

Re: [Discuss-gnuradio] return value of gr::block::general_work

Hi Weihan, For any block, the noutput_items is just a scalar - meaning "number of items actually written to each output stream" is same for all the output ports. The buffer size of all output ports are the same. Best, Sakthivel On Wed, Jan 17, 2018 at 4:23 PM, Weihan Chen

Re: [Discuss-gnuradio] Is there a way to know whether more input data will become available?

Hi Markus, A better way is to specify the amount of data you need for the processing in the forecast function. By doing so, the GNU Radio scheduler will guarantee the sufficient amount of input data and hence you can remove the return 0 from the work function. Best, Sakthivel On Wed, Jan 17,

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

makev. On 13 January 2018 at 01:23, Sakthivel Velumani <sakth...@gmail.com> wrote: > Hi Sumit, > > You have given no of input streams as 2 but mentioned size of item for > only one. This may be the source of the error. Try correcting it and let us > know. > > Regards,

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

Hi Sumit, You have given no of input streams as 2 but mentioned size of item for only one. This may be the source of the error. Try correcting it and let us know. Regards, Sakthivel On Fri, Jan 12, 2018 at 10:37 PM, sumit kumar wrote: > Hi, > > I am trying to use

[Discuss-gnuradio] Poly Filter Bank for unfiltered signals

Hi all, I want to use the pfb_clock_sync block to correct the timing delay in my received signal. The received signal in my case is not pulse shaped i.e no RRC or any filter is used at the transmitter side. In this case what should I give in the filter taps field of the pfb block? I tried all 1s

Re: [Discuss-gnuradio] Python import error on swig modules

l > function line ("return importlib.import_module('__swig')"). > With those lines commented out, you should see the actual import error. > Hope this helps! - MLD > > On Fri, Jan 5, 2018, at 1:13 PM, Sakthivel Velumani wrote: > > I have been trying to do the simpl

Re: [Discuss-gnuradio] [Discuss-GR] Filter output float to complex

ivel - I can't view your Github repo; please recheck it. - MLD > > On Fri, Jan 5, 2018, at 8:33 AM, Sakthivel Velumani wrote: > > Please find the code here https://github.com/saki92/oqpsk-sync-block . I > am trying to build a clock sync block for oqpsk with pfb_clock_sync as >

[Discuss-gnuradio] Python import error on swig modules

Hi, I have been trying to do the simplest qa test for my qpsk demod C++ block from the tutorials. When I run the qa_.py im getting an import error: No module named _swig. This happens for every C++ blocks. I can see that _swig.py is being installed into

Re: [Discuss-gnuradio] Filter output float to complex

t; "it crashes". Does it segfault without a message? does it give a python > error? A C++ exception? > > Best regards, > Marcus > > > On Fri, 2018-01-05 at 10:53 +0100, Sakthivel Velumani wrote: > > Hi all, > > > > I am writing a block which takes in c

[Discuss-gnuradio] Filter output float to complex

Hi all, I am writing a block which takes in complex samples and performs filtering and other operations on real and imag part separately and then combines them to output as complex. When I combine two fir_filter_fff outputs like - out[i].real(filterObject.filter();

Re: [Discuss-gnuradio] noutput_items in every block

note" above with this concept and you have a rough > interpretation of the scheduler algorithm. Thus, with data streaming the > scheduler has to be able to work with dynamic amounts of I/O data / buffer > space. > > On Mon, Jan 1, 2018, at 10:30 AM, Sakthivel Velumani wrote: > > I am new

[Discuss-gnuradio] noutput_items in every block

Hi all, I am new to GNU radio. I have this general doubt that when items are streamed from one block to another, how many input_items per port (consider a type general block) are passed when the work() function of the block is called each time? I guess this is handled by the GNU radio's scheduler

Re: [Discuss-gnuradio] C++ OOT Installation Problem

gt; >> Hello Sakthivel, >> >> did the installation run to completion without any warning/error? Which >> OS are you using? >> >> assuming a linux-based machine, did you run the following command after >> installation? >> $ sudo ldconfig >>

Re: [Discuss-gnuradio] C++ OOT Installation Problem

? > > assuming a linux-based machine, did you run the following command after > installation? > $ sudo ldconfig > > please try to do so and tell us if it worked. > > -Nicolas > > On Thu, Dec 28, 2017 at 12:55 PM, sakthivel velumani <sakth...@gmail.com>

[Discuss-gnuradio] C++ OOT Installation Problem

Hi all. I am new to gnuradio and just taking the tutorials on creating new OOT modules. I completed the python tutorial and everything worked. But in C++ after compiling and installing the block, I could not find my new OOT category or my new block in GRC. Does anyone know the possible cause?

[Discuss-gnuradio] Costas Loop in GNU radio

Hi All, I have a question regarding Costas loop for QPSK phase synchronization. I had read some papers on it and worked on the math behind it. I understood that the costas loop takes the QPSK modulated signal (in which the original carrier signal is hidden), multiples with a locally generated

[Discuss-gnuradio] DVB-S Receiver

Hi all, I am doing my master degree in wireless communication and new to GNUradio. I am very much interested to work with it and to contribute something. As far as I have searched there is no DVB-S receiver module built for GNUradio but there were repos for DVB-S transmitter. Is there a reason

[Discuss-gnuradio] DVB-T2 encoder

k? I had installed GNU radio. 2. If I have to develope some code, would i prefer c++ or python? Thank you Best regards Sakthivel Velumani ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio