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| Particle Swarm Optimization-Based and Receive-Diversity-Aided Multiuser Detection for STBC MC-CDMA Systems |
| Liu Hong-wu; Feng Quan-yuan |
| School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract A Particle Swarm Optimization (PSO) based Multiuser Detection (MUD) is proposed for the receive- diversity-aided and Space-Time Block Coded Multi-Carrier Code-Division Multiple-Access (STBC-MC-CDMA) systems. Due to the receive-diversity, the signals received at the different antennas are faded independently, resulting in an independent cost function for each antenna. To resolve the multi-objective dilemma when choosing one signal estimation for multiple receive antenna-branches, the virtual Pareto front is introduced, and each particle updates it’s velocity and position in a Pareto optimal way. Simulations show that the proposed scheme has the enhanced capabilities of exploration and exploitation and has better performance than the conventional PSO and multi-objective genetic algorithm.
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Received: 02 November 2007
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2009, Vol. 31 
