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Multiuser detectors for synchronous DS-CDMA systems based on a recursive p-norm convex relaxation approach

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3 Author(s)
Wang, X.M. ; Dept. of Electr. & Comput. Eng., Univ. of Victoria, BC, Canada ; Wu-Sheng Lu ; Antoniou, A.

Multiuser detectors for direct-sequence code-division multiple-access (DS-CDMA) systems based on a recursive convex programming (RCP) relaxation approach are proposed. In these detectors, maximum likelihood (ML) detection is carried out in two steps: first, the combinatorial problem associated with ML detection is relaxed into a convex programming problem and then a recursive approach is applied to get an approximate solution for ML detection. Computer simulations demonstrate that the bit-error rate performance offered by the new detectors is near-optimal and superior to that offered by many existing suboptimal detectors including some recently proposed semidefinite-programming relaxation (SDPR) detectors. In addition, the amount of computation required by the RCP detectors is much less than that required by SDPR detectors.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:52 ,  Issue: 5 )

Date of Publication:

May 2005

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