[email protected] wrote:
Message: 2
Date: Sun, 01 Nov 2009 10:17:59 -0800
From: Josh Blum <[email protected]>
Subject: Re: [Discuss-gnuradio] Clear my fundamentals :)
To: Blue Boy <[email protected]>
Cc: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Blue Boy wrote:
Hello Everyone,
My first post:
I am a windows kernel programmer by profession.Recently my interest
has grown for SDR gnuradio.I an new to this field so I have newbie
doubts.I would welcome if you just point to some links for my answers.
1] What is usrp cfile format? complex/float but whats stored in numbers
like amplitude/intensity/phase difference etc.
Its a binary file containing 64-bit complex numbers where each 64 bit
complex number is 2 32-bit floating point numbers corresponding to to
the real and imaginary parts of a complex number.
2] Is frequency also stored in the cfile ? or we have to assume
frequency from file name? How to reconstruct complete/sampled signal
from Cfile ?
You need to know the sampling rate and baseband frequency, the file is
just raw data samples without any context.
Hi Josh,
I have a related question: Is there anything like an (upcoming) industry
standard for recorded SDR samples, *including* the metadata? I guess
that would make it a lot easier to exchange recordings between different
platforms, and would also save people from the hassle of encoding
metadata in the filename or an external data source.
I guess NetCDF would be one possible way - it's widely used e.g. in the
geosciences:
http://www.unidata.ucar.edu/software/netcdf/usage.html
http://www.unidata.ucar.edu/software/netcdf/docs/faq.html#whatisit
Of course we would have to define the schema for SDR data...
Alex
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
