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• W2103472722 abstract "This paper describes a technique for realizing a high-rank channel matrix in a line-of-sight (LOS) multiple-input multiple-output (MIMO) transmission scenario. This is beneficial for systems which are unable to make use of the originally derived MIMO gain given by independent and identically distributed (i.i.d.) flat Rayleigh fading subchannels. The technique is based on optimization of antenna placement in uniform linear arrays with respect to mutual information (MI). By introducing a new and more general 3-D geometrical model than that applied in earlier work, additional insight into the optimal design parameters is gained. We also perform a novel analysis of the sensitivity of the optimal design parameters, and derive analytical expressions for the eigenvalues of the pure LOS channel matrix which are valid also when allowing for non-optimal design. Furthermore, we investigate the approximations introduced in the derivations, in order to reveal when the results are applicable. The LOS matrix is employed in a Ricean fading channel model, and performance is evaluated with respect to the average MI and the MI cumulative distribution function. Our results show that even with some deviation from the optimal design, the LOS MEMO case outperforms the i.i.d. Rayleigh case in terms of MI." @default.
• W2103472722 created "2016-06-24" @default.
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• W2103472722 date "2007-04-01" @default.
• W2103472722 modified "2023-10-16" @default.
• W2103472722 title "Design of Optimal High-Rank Line-of-Sight MIMO Channels" @default.
• W2103472722 cites W1667950888 @default.
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• W2103472722 doi "https://doi.org/10.1109/twc.2007.348338" @default.
• W2103472722 hasPublicationYear "2007" @default.
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