Multiuser detectors with disjoint Kalman channel estimators for synchronous CDMA mobile radio channels

Author

Wu, Peter Hsin-Yu ; Duel-Hallen, Alexandra

Author_Institution

Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA

Volume

48

Issue

5

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

752

Lastpage

756

Abstract

We compare performance of several multiuser detectors for differentially encoded data combined with simple, disjoint, decision-directed Kalman channel estimators over flat Rayleigh fading channels. Simpler detectors with noncoherent differential detection are also compared. Different performance trends relative to the case of perfect channel estimation are observed. We find that in the presence of channel mismatch, the linear decorrelator is the most robust detector in terms of the bit-error rate and the near-far resistance. Parameter adjustment for fading channel modeling and estimation in the decision-directed mode are also discussed

Keywords

Kalman filters; Rayleigh channels; autoregressive processes; code division multiple access; decorrelation; differential detection; encoding; error statistics; filtering theory; interference suppression; land mobile radio; multiuser channels; parameter estimation; radiofrequency interference; signal detection; Jakes model; Kalman filter; autoregressive fading channel model; bit-error rate; channel mismatch; coefficient adjustment; decision-directed Kalman channel estimators; decision-directed mode; differential detection; differentially encoded data; disjoint Kalman channel estimators; fading channel estimation; fading channel modeling; flat Rayleigh fading channels; linear decorrelator; multiple access interference; multiuser detectors; near-far resistance; noncoherent differential detection; parameter adjustment; perfect channel estimation; performance; second-order AR model; synchronous CDMA mobile radio channels; Channel estimation; Code division multiplexing; Detectors; Fading; Filtering; Kalman filters; Land mobile radio; Multiaccess communication; Multiple access interference; Multiuser detection;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.843185

Filename

843185