Abstract：This paper proposed two new decoders for space-time block coded multiuser system over time-selective fading channels. For space-time block coded multiuser system, the design of conventional Zero Forcing (ZF) and Minimum Mean Squared Error (MMSE) decoder is based on the assuming that channels are quasi-static. When the channels are time-selective fading, these conventional decoders induce the Inter-Symbol Interference (ISI), in order to obtain one user’s signals, furthermore, the ISI becomes larger resulted from the increase of the channels time variations. So, this paper designed two new decoders and these decoders reduced greatly the influence of the channels time variations. Simulation results show that the both conventional decoders exhibit error floors, whereas the new decoders obtain more notable performance gains as the increase of Signal-to-Noise Ratio (SNR) values.
2006, Vol. 28 
