Keigo Takeuchi Toshiyuki Tanaka Toru Yano Asymptotic Analysis of General Multiuser Detectors in MIMO DS-CDMA Channels. 486-496 2008 26 IEEE Journal on Selected Areas in Communications 3 http://dx.doi.org/10.1109/JSAC.2008.080407 db/journals/jsac/jsac26.html#TakeuchiTY08