Abstract
Particle swarm optimization algorithm (PSO) has showed great advantage in solving multidimensional and non-linear problems, and it is easy to be applied. By improving binary particle swarm optimization (BPSO) algorithm and applying it in direct sequence code-division multiple-access (DS-CDMA) system as a multiuser detection algorithm, a BPSO multiuser detection (BPSO-MUD) is proposed in this paper and the relationship between the physical meaning of each variable in BPSO-MUD and DS-CDMA system is described clearly, followed by the discussion of highly efficient multiuser detection (MUD). Simulations show that these proposed detections are benefited greatly from the BPSO, they have significant performance improvements over conventional detection (CD), and they approach the performances without multiple access interference (MAI) in CDMA system; moreover they are easy to be applied in CDMA system.
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