@INPROCEEDINGS {11497,
author={S.  Teodoro and A.  Silva and J.G. Gil and A. Gameiro},
doi={},
booktitle={IEEE International Symp. on Communications and Information Technologies - ISCIT},
title={Distributed space-frequency block coding for a 2-antenna relay in downlink OFDM systems},
year={2009},
month={September},
volume={1},
pages={853-858} 
}