Re: [Discuss-gnuradio] UHD Underrun with Wav File Source and USRP Sink

On 11/12/2012 02:10 PM, Tom Hendrick wrote: > > > Hello Josh, > > Thanks for the suggestion. Yes I had zero padded the file with about 1 > second of zero signal prior to the signal I want to transmit. I had still > seen the blip/noise when running the script even when there was 1 second of

Re: [Discuss-gnuradio] Re : audio signal transmission

Hi guelord, thanks for reply i am attaching the grc files. kindly go through those files and send me the necessary corrections. On Mon, Nov 12, 2012 at 11:42 AM, guelord ingala wrote: > Hi Lingeswar, > I guess it would be a good idea if you could send me a picture of your > flow graph in order to

Re: [Discuss-gnuradio] A problem to the FFT Block

On 11/13/2012 10:38 PM, Tom Rondeau wrote: On Tue, Nov 13, 2012 at 10:43 AM, Zhiwen He > wrote: hello all, When I use the fft blcok, it seems not right. I build the test system like this: Square source -> IFFT -> FFT -> File Sink, when the input is

Re: [Discuss-gnuradio] streaming from file

On Tue, Nov 13, 2012 at 4:32 PM, Nowlan, Sean wrote: > Hi all, > > > > I am working on a custom block that tags a stream based on a binary file > stretched into unpacked form: > > > > (1) (2) > (3) > > gr_file_source(repeat=false) --> gr_packed_to_unpacked(1, gr.MSB_FI

Re: [Discuss-gnuradio] A problem to the FFT Block

On Tue, Nov 13, 2012 at 10:43 AM, Zhiwen He wrote: > hello all, > > > When I use the fft blcok, it seems not right. > > I build the test system like this: Square source -> IFFT -> FFT -> File > Sink, when the input is 1, the output in the file sink is 1, and when the > intput is 0, the output

Re: [Discuss-gnuradio] Segmentation fault for aligned volk kernel with custom arrays

On Mon, Nov 12, 2012 at 4:55 AM, "Martin Lülf" wrote: >> On Fri, Nov 9, 2012 at 11:47 AM, "Martin Lülf" wrote: >>> Hi list, >>> >>> I am trying to speed up my own gnuradio block using volk. Besides using >>> volk on gnuradios input and output buffers I also want do use it with my >>> own arrays.

[Discuss-gnuradio] where should i start if i wanna modify the FPGA code on N210

Hi, I am currently doing channel sounding on USRP N210. There is an example of sounder in the old release 3.4. However, it is designed for usrp1. I am reading its fpga code and trying to follow its work flow. When doing grc based channel sounding, i can not work at a high sampling rate. Also my net

Re: [Discuss-gnuradio] Vector inputs/outputs with GRExtras block interface

On 11/13/2012 02:35 PM, Roy Thompson wrote: > Is it possible to use a vector input or output with a block that uses > the GRExtras interface? All of the examples for specifying the I/O > signature for a Python block only show using a numpy type to specify > the data width. > Actually the neat

[Discuss-gnuradio] Vector inputs/outputs with GRExtras block interface

Is it possible to use a vector input or output with a block that uses the GRExtras interface? All of the examples for specifying the I/O signature for a Python block only show using a numpy type to specify the data width. I also tried creating a C++ block and setting the sizeof_stream_item parame

[Discuss-gnuradio] streaming from file

Hi all, I am working on a custom block that tags a stream based on a binary file stretched into unpacked form: (1) (2)(3) gr_file_source(repeat=false) --> gr_packed_to_unpacked(1, gr.MSB_FIRST) --> my_block I want to come up

[Discuss-gnuradio] using gnu radio

Hello all,   I am doing my senior design project on cooperative spectrum sensing. I have already done the theortical design and matlab simulation for the system. Now, I want to implement this on a hardware. I want to use gnu radio and usrp. Does anyone know a good place to start? or any lin

[Discuss-gnuradio] Paper: DCSK chaotic modulations with GNU Radio.

Hi, I would like to announce a paper I published few months ago with some friends on a DCSK chaotic modulation implementation with GNU Radio. The full reference is: Georges Kaddoum, Julien Olivain, Guillaume Beaufort Samson, Pascal Giard, Francois Gagnon: "Implementation of a Differential C

Re: [Discuss-gnuradio] SWIG Includes for GRExtras blocks

On 11/12/2012 02:24 PM, Roy Thompson wrote: > Well, I guess it fixed the compilation problem, but now I am having a > problem when I try to import the swig module in Python: > > Traceback (most recent call last): > File "/root/mockup_test.py", line 15, in > import argon > File "/usr/lib

[Discuss-gnuradio] A problem to the FFT Block

hello all, When I use the fft blcok, it seems not right. I build the test system like this: Square source -> IFFT -> FFT -> File Sink, when the input is 1, the output in the file sink is 1, and when the intput is 0, the output is random, sometimes 0, sometimes between -1 and 1. Like this: i

Re: [Discuss-gnuradio] custom block with variable type inputs/outputs.

When you go to the GNU Radio website, then navigate to the tutorials section, there's a tutorial "How to design a signal processing block with variable types of inputs or outputs". It's a bit outdated, but really not hard to find. http://gnuradio.org/redmine/projects/gnuradio/wiki/Tutorials#How-t

Re: [Discuss-gnuradio] custom block with variable type inputs/outputs.

I really need some help in making custom blocks with input/outputs of variable data types.  Has anybody done this before? Any Tutorial/Link? Regards. Ahmed. From: Ahmed Zaheer To: Tom Rondeau Cc: "discuss-gnuradio@gnu.org" Sent: Friday, November 9, 2012 8