Antenna Diversity Performance For UMTS

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Antenna Diversity Performance For UMTS A.M.
Street(1) L. Lukama(1) J.G.O. Moss(2) D.J.
Edwards(1) (1)Department of Engineering
Science, University of Oxford, Parks Road,
Oxford, OX1 3PJ. www.eng.ox.ac.uk/comwww (2) BT
Laboratories, Mobility Research Unit, B55/122, BT
Adastral park, Ipswich, IP5 3RE
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• Some features of UMTS
• Due to be launched in the UK in 2002 (Spectrum
  auctions in progress)
• Based on W-CDMA in the FDD mode and CDMA/TDMA in
  TDD.
• W-CDMA with different chipping rates.
• Data rates of up to 2 Mbps for low mobility users
• Support multimedia data services live video
  conferencing, www, email etc.
• A variety of hand sets and data terminals.
• Networks will have hierarchical cell structures.
• No line-of-sight in most cases (resulting in
  multipath fading)

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• Overview of presentation
• Description of measurement system and the
  measurement sites
• Data processing and analysis
• Results
• Conclusions

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Measurement system
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Measurement sites (Department of Engineering
Science Oxford)
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Results 1
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Results 2
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Results 3
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Results 4
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Results 5
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Conclusions

• Presented initial results of the Antenna
  diversity study in outdoor-indoor environment.
• Both spatial and polarization diversity
  considered.
• Combination of RAKE and different diversity
  combining techniques used
• Spatial diversity appears proved to be as
  effective as polarization diversity

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• Acknowledgements
• Authors would like to thank
• British Telecom
• HP-Eesof
• The Rhodes Trust.

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