Interference mitigation in femtocell networks using single-radio parasitic antennas

Rongrong Qian, Mathini Sellathurai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The femtocell networks provide a promising solution to increase system capacity and improve indoor coverage. However, inter-cell interference becomes enormous in femtocells due to dense deployment and cell-size reduction. This paper proposes the interference mitigation method for the downlink of femtocells, using the electronically steerable parasitic array radiator (ESPAR) antenna at both femto-base stations (FBSs) and user terminals (UTs), which relies on a single radio-frequency (RF) chain; thus meets the demanding low-power, low-cost and small-size requirements of modern wireless terminals - FBSs and UTs. We first exploit the ESPAR antenna as a switched-beam array capable of predefining directional beampatterns accessing to different angular sectors. Then each FBS/UT dynamically selects an appropriate beampattern according to its measurement of desired direction. We also consider an optimal way to employ the ESPAR antenna by adaptively designing the beampattern steering to desired direction while placing nulls to interferers. The results show significant gains obtained by using ESPAR antennas at both FBSs and UTs.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications (ICC), 2015
Number of pages6
ISBN (Print)9781467364324
Publication statusPublished - 2015
Event2015 IEEE International Conference on Communications - London, London, United Kingdom
Duration: 8 Jun 201512 Jun 2015


Conference2015 IEEE International Conference on Communications
Abbreviated titleICC 2015
Country/TerritoryUnited Kingdom


  • adaptive beamforming
  • beam switching
  • Femtocell

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications


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