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Frequency dependency of the spatial-temporal characteristics of UMTS FDD links

Research output: Working paperWorking paper and Preprints

  • SE Foo
  • MA Beach
  • Peter Karlsson
  • P Eneroth
  • B Lindmark
  • J Johansson
Original languageEnglish
Publication dateJan 2002
Pages6 p
StatePublished

Publication series

NameCOST 273
NameTD (02) 027

Abstract

Smart antennas promise to provide range extension and capacity enhancements crucial to the successful deployment of Universal Mobile Telecommunications System (UMTS) networks. The frequency offset between the uplink and downlink in the Frequency Division Duplex (FDD) air interface gives rise to a frequency dependency in the channel responses and potential problems in downlink beamforming. In order to investigate this, a highly novel dual-band, dualpolarised channel sounding trial was performed in the UMTS FDD bands by the University of Bristol. The wideband measurements were conducted in the City of Bristol, encompassing urban city and sub-urban residential scenarios and subsequent post processing was performed to extract channel parameters across the two bands. This paper presents the results and analysis done so far. It was observed that there was generally a higher degree of scattering in the higher frequency band, resulting in larger angular spreads and delay spreads in most locations. The channels also exhibited a strong degree of de-correlation when viewed from the spatial and temporal domains

Additional information

Additional information: A paper presented to the 3rd Management Committee Meeting of COST 273 : Towards Mobile Broadband Multimedia Networks, held in Guildford, UK, October 17-18, 2002 Sponsorship: The authors gratefully acknowledge financial support of HEFCE for the procurement of the Medav RUSK system under JREI ’98, Allgon Systems AB for loan of the UMTS array, Philip Mattos of ST Electronics for the GPS receiver. In addition, we are grateful to the Overseas Research Studentship (ORS) and the University of Bristol for their financial support of S.E. Foo Contributor: European Cooperation in the Field of Scientific and Technical Research (EURO-COST)

Research areas

  • UMTS, smart antennas

Documents

Documents

  • Working paper

    Author final version (often known as postprint) , 976 KB, PDF-document

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