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English (United Kingdom)

The Impact of the Position of MIMO Terminal User's Hand on Channel Capacity

Year: 2007
Type of Publication: In Proceedings Keywords: MIMO communication , antenna radiation patterns , channel capacity , covariance matrices , microstrip antenna arrays , mobile handsets , notebook computers
Book title: IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2007)
Pages: 1-5
Month: 3-7 September
In this paper the impact of the position of user's hand holding a multiple-input-multiple-output (MIMO) terminal on system performance and more specifically on channel capacity is investigated. We consider a 4times4 MIMO system with a personal digital assistant (PDA) equipped with a compact array of 4 patch elements. Radiation field patterns of the antenna elements in the presence of the other elements as well as in the presence of a user's hand are simulated. Different positions of the user's hand are taken into account. The covariance matrix of the receiving antennas is evaluated by means of the obtained patterns. A correlation-based channel model is considered, where the antenna patterns are incorporated. Extensive simulations showed that the performance of the MIMO systems varies significantly with the position of the user's hand.