@INPROCEEDINGS {1662,
author={A. Navarro and B.F.C Gabriel},
doi={},
booktitle={Mathematical Techniques and Problems in Telecommunications},
title={Optimal M-QAM/DAPSK Allocation in Narrowband OFDM Radio Channels”, Mathematical Techniques and Problems in Telecommunications},
year={2003},
month={September},
volume={1},
pages={219-224} 
}