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Transmit diversity vs. spatial multiplexing in modern MIMO systems
Lozano Solsona, Àngel; Jindal, Nihar
Universitat Pompeu Fabra
A contemporary perspective on the tradeoff between transmit antenna diversity andspatial multiplexing is provided. It is argued that, in the context of most modern wirelesssystems and for the operating points of interest, transmission techniques that utilizeall available spatial degrees of freedom for multiplexing outperform techniques that explicitlysacrifice spatial multiplexing for diversity. In the context of such systems, therefore,there essentially is no decision to be made between transmit antenna diversity and spatialmultiplexing in MIMO communication. Reaching this conclusion, however, requires thatthe channel and some key system features be adequately modeled and that suitable performancemetrics be adopted; failure to do so may bring about starkly different conclusions. Asa specific example, this contrast is illustrated using the 3GPP Long-Term Evolution systemdesign.
Tractament del senyal
Comunicació sense fil, Sistemes de
Ràdio -- Antenes
Spatial Multiplexing
Multiantenna Communication
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Institute of Electrical and Electronics Engineers (IEEE)

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