An SD method utilizing null dependency on transmission distance due to two-ray fading

Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

Research output: Contribution to journalArticle

3 Citations (Scopus)


A spatial division (SD) transmission method utilizing the characteristics of two-ray fading due to ground reflection with linear antenna arrays horizontal to the ground is proposed. Formulations of the optimum array arrangements as functions of the transmission distance and achievable channel capacity are clarified. For two- and three-element arrays, channel capacity is respectively doubled and tripled over that of free-space propagation. The proposed method provides increased capacity without the extra signal processing cost incurred when using conventional multiple-input-multiple-output (MIMO) transmission.

Original languageEnglish
Article number6701188
Pages (from-to)126-129
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Publication statusPublished - Feb 24 2014
Externally publishedYes



  • Parallel transmission
  • Spatial division multiplexing
  • Two-ray ground reflection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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