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• W2049915429 abstract "The overloaded CDMA system, in which the number of users is larger than the dimension of signal space experiences a very serious problem of multiple access interference which is the major limiting factor for the channel capacity. In this letter we used multicarrier communication to resolve the problem of overloading. Computational complexity associated with optimum maximum likelihood detector (MLD) in wideband code division multiple access (WCDMA) systems is also addressed by using the particle swarm optimization (PSO) algorithm. In the proposed scheme, large number of users in an overloaded system is divided in groups. A carrier is modulated with the composite signal of each group. The carriers of each group are orthogonal to each other. Detection of individual users in a particular group is accomplished through PSO algorithm. PSO algorithm lowers the search space compared to MLD. Simulation results show that PSO algorithm avoids being trapped in any local minima and gives a much faster convergence compared to MLD. It also performed better than other suboptimal detectors." @default.
• W2049915429 created "2016-06-24" @default.
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• W2049915429 date "2010-06-01" @default.
• W2049915429 modified "2023-09-26" @default.
• W2049915429 title "Particle swarm optimization based MUD for overloaded MC-CDMA system" @default.
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• W2049915429 doi "https://doi.org/10.1109/wcins.2010.5541874" @default.
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