Design Linear Multiuser Transmitters From Linear Multiuser Receivers

Novel concepts are introduced for finding the relationship between Multi-User Detection (MUD) and Multi-User Transmission (MUT), so that the study in MUT can benefit from the well-built theory in MUD. The authors' study shows that, for any given linear MUD scheme, there exists a counterpart linear MUT scheme, which can be readily designed from the original linear MUD. Based on their observations, a range of MUT algorithms are derived in correspondence with the well-known linear processing schemes in the fields of MUD and array processing, including Minimum Mean-Square Error (MMSE), Minimum Variance Distortionless Response (MVDR), Minimum Power Distortionless Response (MPDR) and Maximum Signal-to-Interference-plus-Noise Ratio (MSINR), respectively.