Capacity of the Continuous-Space Electromagnetic Channel

Constructing the capacity bound of a multiple-input multiple-output wireless system is often performed by assuming specified antenna configurations and a propagation environment and determining the signaling strategy which maximizes throughput. This paper extends this approach to further determine t...

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Veröffentlicht in:	IEEE transactions on antennas and propagation Jg. 56; H. 2; S. 524 - 531
Hauptverfasser:	Jensen, M.A., Wallace, J.W.
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	New York, NY IEEE 01.02.2008 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:	Antenna arrays Antenna radiation patterns Antennas Antennas and propagation Applied classical electromagnetism Applied sciences Arrays Channels Eigenvalues and eigenfunctions Electromagnetic propagation Electromagnetic wave propagation, radiowave propagation Electromagnetism; electron and ion optics Exact sciences and technology Fundamental areas of phenomenology (including applications) Information theory Mathematical analysis Mathematical models MIMO Multipath channels multiple-input multiple-output (MIMO) systems Numerical models Optimization Physics Radiocommunications Receivers Receiving antennas Strategy Switching and signalling Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Throughput Transmitters. Receivers MIMO system Electromagnetism Eigenfunction Wireless telecommunication Information rate Transmitter Signalling Information transmission Multipath channels Optimal design Numerical computation multipath channels multiple- input multiple-output (MIMO) systems Antenna Information theory
ISSN:	0018-926X, 1558-2221
Online-Zugang:	Volltext
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Zusammenfassung:	Constructing the capacity bound of a multiple-input multiple-output wireless system is often performed by assuming specified antenna configurations and a propagation environment and determining the signaling strategy which maximizes throughput. This paper extends this approach to further determine the optimal antenna characteristics which maximize the capacity for the propagation scenario, with the resulting capacity bound representing the ultimate maximum achievable value if optimal antenna design and signaling are used. In this approach, the spatially-continuous transmit currents and receive fields are represented using eigenfunctions of appropriate operators. It is shown that, except under certain conditions where array supergain solutions emerge, the capacity remains bounded for finite transmit power. The approach also shows how to limit supergain effects using practical constraints. Model problems and numerical computations are provided for different power constraints at the transmitter and noise characteristics at the receiver.
Bibliographie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23
ISSN:	0018-926X 1558-2221
DOI:	10.1109/TAP.2007.915416