Minimum probability of error for asynchronous Gaussian multiple-access channels
IEEE Transactions on Information Theory
Population declining ant colony optimization algorithm and its applications
Expert Systems with Applications: An International Journal
Analysis of the Linear GSIC Multiuser Detector Using a Matrix Iterative Approach
Wireless Personal Communications: An International Journal
IEEE Computational Intelligence Magazine
A hybrid ant colony optimization algorithm for optimal multiuser detection in DS-UWB system
Expert Systems with Applications: An International Journal
Cognitive Radio Engine Design Based on Ant Colony Optimization
Wireless Personal Communications: An International Journal
Reconfiguration Decision Making Based on Ant Colony Optimization in Cognitive Radio Network
Wireless Personal Communications: An International Journal
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In this paper we present a population declining ant colony optimization (PDACO) multiuser detector for asynchronous CDMA communications. Ant colony optimization (ACO) algorithms have already been used in multiuser detection in CDMA systems; however, as the pheromone accumulates, we may not get a global optimum because it stops searching early. PDACO can enlarge searching range through increasing the initial population of the ant colony, and the population declines in successive iterations. So, the performance of PDACO is superior with the same computational complexity. PDACO is applied to multiuser detection in asynchronous CDMA systems over slowly multipath Rayleigh-fading channels in this paper. Via computer simulations it is shown that the performance of PDACO detector is much better in bit-error rate and near-far effect resistance than conventional detector, ACO detector and genetic algorithm detector, and is close the optimal multiuser detector.