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

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3 Author(s)
M. Nasiri-Kenari ; Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran ; R. R. Sylvester ; C. K. Rushforth

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

Published in:

IEEE Transactions on Vehicular Technology  (Volume:47 ,  Issue: 3 )