[Discuss-gnuradio] How to store recieved signal (time, voltage) in .txt format

[Bruhtesfa Ebrahim]

Hey all,

 I want to store the signal I recieve from my USRP+XVR2450 in a text file,
in 2 columns(1st clumn time and 2nd column I and Q voltage levels from
USRP at each sampling time).
 So, how can I do this in the Python? I want to do this because I prefer to
do the signal processing on the baseband signal in Mat Lab(by importing the
txt file data) rather than defining a new signal processing block in python.


Thanks

  Bruhtesfa
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Re: [Discuss-gnuradio] How to store recieved signal (time, voltage) in .txt format

[Jason Uher]

  So, how can I do this in the Python? I want to do this because I prefer
 to do the signal processing on the baseband signal in Mat Lab


 you can use gr.file_sink() to save your receive data.

http://www.gnuradio.org/trac/wiki/Octave

The directions are the same for Matlab.

Jason


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Re: [Discuss-gnuradio] How to store recieved signal (time, voltage) in .txt format

[Bruhtesfa Godana]

Hey slimchao,

Thanks for the reply!  I tried gr.file_sink().
It writes something in a txt file, but when I open it it is not in  
readable format.
Is there something that I can do to make it a readable .txt format for  
the MAt lab, where every sampled value is written as float value on a  
new line?


Thanks!


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Re: [Discuss-gnuradio] How to store recieved signal (time, voltage) in .txt format

[slimchao]

Bruhtesfa Ebrahim wrote:
 
 Hey all,
 
  I want to store the signal I recieve from my USRP+XVR2450 in a text file,
 in 2 columns(1st clumn time and 2nd column I and Q voltage levels from
 USRP at each sampling time).
  So, how can I do this in the Python? I want to do this because I prefer
 to
 do the signal processing on the baseband signal in Mat Lab(by importing
 the
 txt file data) rather than defining a new signal processing block in
 python.
 
 
 Thanks
 
   Bruhtesfa
 
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 Discuss-gnuradio@gnu.org
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Hi Bruhtesfa,

you can use gr.file_sink() to save your receive data.

Slimchao
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Re: [Discuss-gnuradio] How to store recieved signal (time, voltage) in .txt format

[Karthik Vijayraghavan]

On Fri, Nov 7, 2008 at 6:21 AM, Bruhtesfa Godana [EMAIL PROTECTED] wrote:

 Hey slimchao,

 Thanks for the reply!  I tried gr.file_sink().
 It writes something in a txt file, but when I open it it is not in readable
 format.
 Is there something that I can do to make it a readable .txt format for the
 MAt lab, where every sampled value is written as float value on a new line?

 Thanks!


gr.file_sink() writes it as a binary file, not a txt file. You can use the
programs found in gnuradio-core/src/utils/read_float_binary.m etc to read
those files from matlab or octave where you can resave them in a format that
you want.

Karthik
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