Boonsarn Pitakdumrongkija Kazuhiko Fukawa Hiroshi Suzuki Takashi Hagiwara Linear Precoding with Minimum BER Criterion for MIMO-OFDM Systems Employing ML Detection. 2522-2527 2007 ICC http://dx.doi.org/10.1109/ICC.2007.417 conf/icc/2007 db/conf/icc/icc2007.html#PitakdumrongkijaFSH07