An efficient soft-in-soft-out multiuser detector for synchronous CDMA with error-control coding

We consider synchronous code-division multiple-access (CDMA) communications incorporating an error-control code (ECC) for improved performance. We describe a reduced-complexity multiuser sequence detector and develop a simple method for computing reliability values for the bit decisions produced by...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 1998-08, Vol.47 (3), p.947-953
Main Authors: Nasiri-Kenari, M., Sylvester, R.R., Rushforth, C.K.
Format: Article
Language:English
Subjects:
Applied sciences
Cities and towns
Code division multiplexing
Covariance matrix
Decision feedback equalizers
Decorrelation
Detectors
Equipments and installations
Error correction codes
Exact sciences and technology
Interference elimination
Mobile radiocommunication systems
Multiaccess communication
Radiocommunications
Statistics
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Description
Summary:We consider synchronous code-division multiple-access (CDMA) communications incorporating an error-control code (ECC) for improved performance. We describe a reduced-complexity multiuser sequence detector and develop a simple method for computing reliability values for the bit decisions produced by this detector. This reliability information is used by a soft-input Viterbi algorithm to decode the ECC. We compare the uncoded and coded performance of this reduced-complexity detector to those of certain decision-feedback equalizer (DFE) multiuser detectors. Simulation shows that the reduced-complexity sequence detector works better than the DFE detectors.
ISSN:0018-9545
1939-9359
DOI:10.1109/25.704848