A study of differencing structure decision feedback equalizer with multiuser feedback

Multiuser interference cancellation decision feedback equalizer with error feedback filter (MIC DFE-EFF), for multiuser detection, based on differencing structure, has been proposed. In this paper, we depict the structure of difference- based MIC DFE (DMIC DFE-EFF), analyze its algorithm and relative algorithm. It can deal with intersymbol interference, multiple access interference and noise at the same time. Numerical results are provided that show that DMIC DFE -EFF improves both computational efficiency in multistage structure and BER performance relative to conventional DFE -EFF, even though better than parallel interference cancellation (PIC) detector. And compared to MIC DFE-EFF, DMIC DFE-EFF also improves computational efficiency.