@INPROCEEDINGS {10682,
author={J.  Rebola and A. Cartaxo},
doi={},
booktitle={International Microwave and Optoelectronics Conf. - IMOC},
title={Using the Moment Generating Function for the Performance Assessment of Optically Preamplified Direct-Detection OFDM Systems},
year={2011},
month={October},
volume={-},
pages={ ---} 
}