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Iterative multiuser detection for CDMA with FEC: near-single-user performance

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4 Author(s)
Reed, M.C. ; Technol. Unit, Ascom Systec AG, Maegenwil, Switzerland ; Schlegel, C.B. ; Alexander, P.D. ; Asenstorfer, J.A.

This paper introduces an iterative multiuser receiver for direct sequence code-division multiple access (DS-CDMA) with forward error control (FEC) coding. The receiver is derived from the maximum a posteriori (MAP) criterion for the joint received signal, but uses only single-user decoders. Iterations of the system are used to improve performance, with dramatic effects. Single-user turbo code decoders are utilized as the FEC system and a complexity study is presented. Simulation results show that the performance approaches single-user performance even for moderate signal-to-noise ratios

Published in:

Communications, IEEE Transactions on  (Volume:46 ,  Issue: 12 )

Date of Publication:

Dec 1998

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