Space domain multistage interference canceller for SDMA

It is difficult for an adaptive array to reduce interference signals effici ently from received signals when the interference signals and desired signa l are closely located. This is a problem for a spatial division multiple ac cess (SDMA) system using the multibeam adaptive array as a multiuser detect or. In this paper, we propose a space domain multistage interference cancel ler (SD-MIC) for the SDMA system. Its performance is evaluated by computer simulations, assuming Japanese personal handy phone system (PHS) uplink env ironments. The results show remarkable improvement in high spatial correlat ion situations.