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Near Optimum Detector for DS-CDMA System Using Particle Swarm Optimization
Muhammad A. S. CHOUDHRY Muhammad ZUBAIR Aqdas NAVEED Ijaz M. QURESHI
IEICE TRANSACTIONS on Communications
Publication Date: 2007/11/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
direct sequence code-division multiple access, particle swarm optimization, multiuser detection,
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The computational complexity of the optimum maximum likelihood detector (OMLD) does not allow its utility for multi-user detection (MUD) in code division multiple access (CDMA) systems. As proposed in this letter, particle swarm optimization (PSO) with soft decision offers a much more efficient option with few parameters to be adjusted, flexibility to implement, that gives a much faster convergence compared to OMLD. It outperforms the conventional detector, the genetic algorithm approach and the standard suboptimal detectors considered in the literature.