An Efficient STBC Detection Algorithm Under Interference-Limited Environment

In this paper, we propose a detection and decoding scheme for a MIMO system using space-time codes (STBC) with external interferences. It is known that current cellular systems are limited by co-channel interference (CCI) more than thermal noise. However, traditional linear decoding schemes have rather poor performance in decoding STBC in this interference-limited environment. To achieve good BER performance with low complexity, an improved minimum mean square error (MMSE) multiuser detection (MUD) with partial group interference cancellation (IC) scheme has been proposed and used. We mainly focus on STBC detection with the one strongest interference and the top two strongest interferences models, which are the most realistic scenario under this circumstance. Finally we present some simulation results to show the advantage of our scheme.