Comunicació presentada en la Global Telecommunications Conference (GLOBECOM '09), celebrada els dies 30 de novembre, 1, 2, 3 i 4 de desembre de 2009 a Honolulu, Hawaii (EUA), organitzada per l’Institute of Electrical and Electronics Engineers (IEEE).

A contemporary perspective on the tradeoff between transmit antenna diversity and spatial multi-plexing is provided. It is argued that, in the context of modern cellular systems and for the operating points of interest, transmission techniques that utilize all available spatial degrees of freedom for multiplexing/noutperform techniques that explicitly sacrifice spatial/nmultiplexing for diversity. Reaching this conclusion, however, requires that the channel and some key system features be adequately modeled; failure to do so may bring about starkly different conclusions. As a specific example, this contrast is illustrated using the 3GPP Long-Term Evolution system design.