@InProceedings{artes-icassp03,
  author	= {H. Art\'es and F. Hlawatsch},
  title		= {Space-time matrix modulation: Extension to unknown doubly selective MIMO channels},
  booktitle	= {Proc. IEEE ICASSP-2003},
  year		= {2003},
  address	= {Hong Kong},
  month		= {April},
  pages		= {41--44},
  volume	= {IV}
}