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

fYear

2000

fDate

2000

Firstpage

385

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2000. Proceedings. IEEE International Symposium on

Conference_Location

Sorrento

Print_ISBN

0-7803-5857-0

Type

conf

DOI

10.1109/ISIT.2000.866683

Filename

866683