Smart antenna performance degradation due to grating lobes in FDD systems

RMM Hunukumbure, MA Beach, B Allen, PN Fletcher, Peter Karlsson

Research output: Working paperWorking paper and Preprints

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Abstract

It is shown here that even for a small increase in the inter-element distance from the nominal half wavelength value, grating lobes could occur in smart antenna radiation patterns. This has practical implications when smart antennas are employed in Frequency Division Duplex (FDD) systems. This paper discusses the impact on the UMTS Terrestrial Radio Access (UTRA) FDD system. The presence of grating lobes is verified and the resultant performance degradation in an interference limited cell is quantified, using simulation results derived from actual field trial measurements taken within the UTRA band
Original languageEnglish
Pages5 p
Publication statusPublished - May 2001

Bibliographical note

Additional information: A paper presented to the 9th Management Committee and Working Group Meeting of COST 260 : Session 3: RF and Beam Forming Hardware and Technology, held in Gothenburg, May 2-5, 2001

Sponsorship: The authors wish to gratefully acknowledge the funding support under HEFCE JREI’98 which enabled the procurement of Medav channel sounder and Allgon systems AB, for providing the antenna array

Contributor: European Cooperation in the Field of Scientific and Technical Research (EURO-COST)

Keywords

  • Frequency Division Duplex (FDD)
  • smart antennas
  • UMTS Terrestrial Radio Access (UTRA)

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