First-ever report on MBWA system field trial: Interference issue in sectored cell layout

N. Izuka, Y. Asano, Y. Yamazaki, H. Oguma, S. Kameda, T. Takagi, K. Tsubouchi

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

13 Citations (Scopus)


This paper discusses results of a MBWA system field trial with Fast Low-latency Access with Seamless Handoff Orthogonal Frequency Division Multiplexing (FLASH-OFDM). The results of the trial show that the downlink throughput performance is significantly impaired by inter-sector interference. To clarify the reasons of the impairment, we carry out a computer simulation on inter-sector interference reduction capability of frequency hopping orthogonal frequency division multiple access (FH-OFDMA), which is used as a multiple access scheme in FLASH-OFDM. The results are summarized as follows: (1) the interference reduction capability of FH-OFDMA is almost the same as that of direct sequence code division multiple access (DS-CDMA), which allocate the same frequency band to all sectors, and (2) in FH-OFDMA, a long hopping-pattern length yields no site diversity effect to reduce inter-sector interference. Additionally, a cumulative distribution of measured signal to noise and interference ratio (SNIR) shows that pilot signals in the neighboring sectors mainly impair the throughput performance. Since a sectored cell layout is mandatory for deployment of the MBWA systems in a high traffic area, inter-sector interference reduction is a key issue for these systems.

Original languageEnglish
Title of host publicationThe 68th IEEE Vehicular Technology Conference, VTC 2008-Fall
Publication statusPublished - 2008 Dec 1
Event68th Semi-Annual IEEE Vehicular Technology, VTC 2008-Fall, Conference - Calgary, AB, Canada
Duration: 2008 Sept 212008 Sept 24

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


Other68th Semi-Annual IEEE Vehicular Technology, VTC 2008-Fall, Conference
CityCalgary, AB


  • Field trial
  • Inter-sector interference
  • MBWA

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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