Design of Optimal High-Rank Line-of-Sight MIMO Channels
Top Cited Papers
- 23 April 2007
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications
- Vol. 6 (4), 1420-1425
- https://doi.org/10.1109/twc.2007.348338
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.Keywords
This publication has 8 references indexed in Scilit:
- Construction and capacity analysis of high-rank line-of-sight MIMO channelsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Analysis of MIMO capacity gains for indoor propagation channels with LOS componentPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- From theory to practice: an overview of MIMO space-time coded wireless systemsIEEE Journal on Selected Areas in Communications, 2003
- Smart geometrical antenna design exploiting the LOS component to enhance a MIMO system based on rayleigh-fading in indoor scenariosPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Distributed source model for short-range MIMOPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Outdoor MIMO wireless channels: models and performance predictionIEEE Transactions on Communications, 2002
- On the capacity formula for multiple input-multiple output wireless channels: a geometric interpretationIEEE Transactions on Communications, 1999
- On Limits of Wireless Communications in a Fading Environment when Using Multiple AntennasWireless Personal Communications, 1998