... successive decoding or treat all otheruser signals as noise. For single-input single-output Rayleigh fading channels, it turns out that the guaranteed MSE pointis the tuple (1, 1, , 1). Thus in order ... “Beamform-ing utilizing channel norm feedback in multiuser MIMOsystems,” in Proceedings of the 8th IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC ’07),pp. 1–5, Helsinki, ... Ottersten, A. Sezgin, and A. Paulraj, “Guar-anteed performance region in fading orthogonal space-timecoded broadcast channels, ” in Proceedings of IEEE the Inter-national Symposium on Information...