The influence of efficiency on receive diversity and MIMO capacity for rayleigh-fading channels
Autor
Valenzuela Valdés, Juan Francisco; García Fernández, Miguel Ángel; Martínez González, Antonio Manuel; Sánchez Hernández, David AgapitoGrupo de investigación
Grupo de Ingeniería de Microondas, Radiocomunicaciones y Electromagnetismo (GIMRE)Área de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This work was supported in part by the Fundación Séneca, the R&D unit of the Autonomous Region of Murcia (Spain) under project references TIC-TEC 06/01-0003, 07/02-0005 and 05746/PI/07, and in part by the Spanish National R&D Programme through TEC2007/63470/TCM.Fecha de publicación
2008-05Editorial
IEEE Antennas and Propagation SocietyCita bibliográfica
VALENZUELA VALDÉS, Juan F., GARCÍA FERNÁNDEZ, Miguel A., MARTÍNEZ GONZÁLEZ, Antonio M., SÁNCHEZ HERNÁNDEZ, David. The influence of efficiency on receive diversity and MIMO capacity for rayleigh-fading channels. IEEE Transaction on Antennas and Propagation Letters, 56 (5): 1444- 1450, Mayo 2008. ISSN 0018-926XPalabras clave
Diversidad de gananciaCapacidad del canal
Multiple entrada y multiple salida (MIMO)
Eficiencia de radiación
MIMO
Diversity gain
Channel capacity
Radiation efficiency
Resumen
A previously published guideline for MIMO antenna
arrays is refuted. The influence of radiation efficiency on diversity
gain and MIMO capacity of wireless communications systems is
investigated through simulations and measurements using a reverberation
chamber. Integrated antennas on a portable device have
efficiencies low enough to disallow typical inter-element correlation
assumptions. Both diversity gain and MIMO capacity depend
on the number of antennas, SNR and efficiency in a complex way.
When the efficiency of antennas is considered, certain system capacity
losses are predicted and measured. These losses may be recovered
through using more receive elements than commonly recommended
or through the addition of a smaller number of more
efficient antennas.
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