An Estimation Method for Amplitude Modification Factor Using Floor Area Ratio in Urban Areas

  • Kazunori Uchida
  • Keisuke Shigetomi
  • Masafumi Takematsu
  • Junich Honda
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 253)


This paper is concerned with a numerical simulation of electric field distributions in urban areas by using the 1-ray model combined with 2-ray model. Introducing amplitude modification factor \( \alpha \) and propagation order \( \beta \) of distance, this model is arranged so that we can deal with propagation in complicated electromagnetic environments. We show that the two parameters \( \alpha \) and \( \beta \) can be obtained from Hata’s empirical equations. In this paper, we propose an estimation method for the electric field distributions in complicated propagation environments in addition to those areas defined by the Hata’s equations by employing statistical data such as building coverage and floor area ratios. Numerical analyses are carried out to show an example of distribution of amplitude modification factor \( \alpha \) in Fukuoka city.


Radio propagation 1-ray model Amplitude modification factor Propagation order 



The work was supported in part by a Grand-in Aid for Scientific Research (C) (24560487) from Japan Society for the Promotion of Science.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Kazunori Uchida
    • 1
  • Keisuke Shigetomi
    • 1
  • Masafumi Takematsu
    • 1
  • Junich Honda
    • 2
  1. 1.Fukuoka Institute of TechnologyFukuokaJapan
  2. 2.Electronic Navigation Research InstituteCyofuJapan

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