Large system error probability of multiuser decision feedback receivers
Rapeepat Ratasuk, Michael L. Honig · 2002
The large system limits of the probability of error for multiuser decision feedback detectors (DFDs) are evaluated for synchronous CDMA. Both successive (S-) and parallel (P-) DFDs are considered, where the filters are optimized according to the minimum mean squared error (MMSE) criterion. A comparison of the analytical results with simulation shows that the large system results accurately predict the performance of systems with a spreading gain /spl ges/128 over a wide range of error rates. The results also show that the P-DFD error rate approaches the single-user bound at high signal-to-noise-ratios (SNRs).