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A reduced state Viterbi algorithm for multiuser detection in DS/CDMA systems

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4 Author(s)
Wang Zhaocheng ; Dept. of Electron. Eng., Tsinghua Univ., Beijing, China ; Ge Ning ; Yao Yan ; Qiang Wang

Code division multiple access (CDMA) has attracted considerable attention in digital cellular mobile and personal communications. We propose a novel multiuser detector based on the reduced state Viterbi algorithm. It partitions the total K users into G groups according to their power strengths and interference levels, which reduces the computational complexity per binary decision from O(2K-1) to O(G*2KG-1/) for asynchronous DS/CDMA systems in AWGN. Theoretical analyses and simulation results are presented to demonstrate the significant performance improvement over the successive interference canceler (SIC)

Published in:

Communication Technology Proceedings, 1996. ICCT'96., 1996 International Conference on  (Volume:2 )

Date of Conference:

5-7 May 1996

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