Error to read dat/binary file in octave as well in matlab from gnu radio

GNU Radio
1

Hello All,

I am facing an error when i am trying to convert dat/bin(octet streams,
binary application) into either octave or mat format.

The bin file is generated from uhd_rx_cfile 0r rx_samples_to_file, which
i used for capturing the transmitted and received signals. Since the
default extension is binary file so i want to read the I&Q data from
that either in Matlab or Octave.

I am trying the following command in octave to convert but it throws an
error ;

addpath("/home/username/gnuradio/gr-utils/")

data_oct = read_complex_binary("/home/username/datafile name")

After this second command it is throwing an error that
read_complex_binary is not defined in line 1 column 12.

What i am doing wrong ?

How can i extract the information from the bin file ?

Any help is appreciated.

Alok Ranjan

2

I am not an Octave expert by any means, but I do have a solution for
you.
It’s pretty slow, but it does work.

filename1 = “samples.cfile”;
fid1 = fopen (filename1, “r”);

tmpreal = fread (fid1, “float32”, 4);
fseek(fid1, 4, ‘bof’);
tmpimag = fread (fid1, “float32”, 4);
DataIn = complex(tmpreal, tmpimag);

best regards,
Ron

3

On 12/05/2014 06:59 AM, alok ranjan via USRP-users wrote:

What i am doing wrong ?

addpath("/home/username/gnuradio/gr-utils/octave")

Cheers,
M