Title :
Large system error probability of multiuser decision feedback receivers
Author :
Ratasuk, Rapeepat ; Honig, Michael L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northwestern Univ., Evanston, IL, USA
Abstract :
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 ⩾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)
Keywords :
code division multiple access; error statistics; feedback; least mean squares methods; multi-access systems; multiuser channels; radio receivers; signal detection; spread spectrum communication; MMSE criterion; error rates; high SNR; large system error probability; minimum mean squared error; multiuser decision feedback receivers; optimized filters; parallel decision feedback receiver; signal-to-noise-ratios; simulation results; single-user bound; spreading gain; successive decision feedback detector; synchronous CDMA; system performance; uncoded synchronous CDMA; Analytical models; Code division multiplexing; Design for disassembly; Detectors; Error analysis; Error probability; Feedback; Filters; Performance analysis; Predictive models;
Conference_Titel :
Information Theory, 2000. Proceedings. IEEE International Symposium on
Conference_Location :
Sorrento
Print_ISBN :
0-7803-5857-0
DOI :
10.1109/ISIT.2000.866683
