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Decorrelating decision-feedback multiuser detector for synchronous code-division multiple-access channel

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1 Author(s)
Duel-Hallen, A. ; Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA

A decorrelating decision-feedback detector (DF) for synchronous code-division multiple-access (CDMA) that uses decisions of the stronger users when forming decisions for the weaker ones is described. The complexity of the DF is linear in the number of users, and it requires only one decision per user. It is shown that performance gains with respect to the linear decorrelating detector are more significant for relatively weak users and that the error probability of the weakest user approaches the single-user bound as interferers grow stronger. The error rate of the DF is compared to those of the decorrelator and the two-stage detector

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Communications, IEEE Transactions on  (Volume:41 ,  Issue: 2 )