Abstract
AbstractThe topic of practical implementation of multiple input multiple output (MIMO) systems for mobile communications has recently gained a lot of attention.Due to the area constraint on a mobile handset, the problem of how to design such a system in order to achieve the best benefit is still a huge challenge. Most researches in this area concern the algorithms to configure the best layout of multiple antennas while assume the wireless channel as the deterministic model. However, mobile users might roam from one channel condition to the others, which the benefit of deterministic antenna positions does no longer exist. In this article, the concern of channel variation has been included in the process of finding MIMO antenna positions. A genetic algorithm (GA) is employed to find the optimal antenna positions on mobile handset for 4 × 4 MIMO systems. The effects of mutual coupling based on Z‐parameter is the main factor to determine the MIMO capacity concerning as the objective function of GA search. The results suggest that the use of average positions among solutions obtained by various channels provide the most compromising benefits to practically design MIMO antenna positions on mobile handset. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2737–2742, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26402
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