Antenna-pattern diversity versus space diversity for use at handhelds

This paper investigates diversity for dual-antenna systems operating in indoor environments. First, an approximated equation of the diversity gain is derived for different combining techniques. These theoretical results show that the two-term approximation, as generally used in the literature , is t...

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Bibliographic Details
Published inIEEE transactions on vehicular technology Vol. 53; no. 4; pp. 1035 - 1042
Main Authors Mattheijssen, P., Herben, M.H.A.J., Dolmans, G., Leyten, L.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.07.2004
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna measurements
Antenna theory
Antennas
Applied sciences
Approximation
Diversity methods
Diversity reception
Equipments and installations
Estimates
Exact sciences and technology
Gain
GSM
Impedance
Indoor environments
Land mobile radio
Mathematical analysis
Mobile radiocommunication systems
Mutual coupling
Noise levels
Radiocommunications
Receiving antennas
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Fading
Mobile radiocommunication
Correlation
Correlated fading
maximal ratio combining
pattern diversity
Wireless telecommunication
Diversity
Performance analysis
diversity gain
selection combining
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Summary:This paper investigates diversity for dual-antenna systems operating in indoor environments. First, an approximated equation of the diversity gain is derived for different combining techniques. These theoretical results show that the two-term approximation, as generally used in the literature , is too rough an estimate. Consequently, a new six-term approximation is derived. Next, it is demonstrated by a comparison of theoretical and experimental diversity gain values that, due to mutual coupling between the two antennas in practice, the diversity gain will not approach 0 dB if the distance between the two antennas approaches zero. Finally, it is concluded from measurements at 900 MHz that antenna-pattern diversity is a better choice than space diversity for use at handhelds.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2004.830156