.mat file to bin file

Hi, I have recorded some WCDMA data using gnuradio and USRP which is in .bin format with 32bit floating point (both I and Q). I used octave to read that bin file and converted to .mat file so that it be imported into MATLAB. I did some signal processing on that data. Now I want that .mat file to be converted back to .bin file. I searched but couldn't succeed. Any pointers ?

Sumit