Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas

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概要

• 論文の詳細を見る

• Wireless ad hoc communications such as ad hoc networks have been attracting researchers attention. They are expected to become a key technology for “ubiquitous” networking because of the ability to configure wireless links by nodes autonomously, without any centralized control facilities. Adaptive array antennas (AAA) have been expected to improve the network efficiency by taking advantage of its adaptive beamforming capability. However, it should be noted that AAA is not almighty. Its interference cancellation capability is limited by the degree-of-freedom (DOF) and the angular resolution as a function of the number of element antennas. Application of AAA without attending to these problems can degrade the efficiency of the network. Let us consider wireless ad hoc communication as a target application for AAA, taking advantage of AAAs interference cancellation capability. The low DOF and insufficient resolution will be crucial problems compared to other wireless systems, since there is no centralized facility to control the nodes to avoid interferences in such systems. A number of interferences might impinge on a node from any direction of arrival (DOA) without any timing control. In this paper, focusing on such limitations of AAA applied in ad hoc communications, we propose a new scheme, Forward Interference Avoidance (FIA), using AAA for ad hoc communications in order to avoid problems caused by the limitation of the AAA capability. It enables nodes to avoid interfering with other nodes so that it increases the number of co-existent wireless links. The performance improvement of ad hoc communications in terms of the number of co-existent links is investigated through computer simulations.

• 2008-09-01

著者

• Fujii Takeo

  Advanced Wireless Communication Research Center, The University of Electro-Communications, Japan

• Fujii Takeo

  Advanced Wireless Communication Research Center The University Of Electro-communications Japan

• Fujii Takeo

  Advance Wireless Communication Research Center (awcc) University Of Electro-communications

• Kamiya Yukihiro

  Graduate School Of Engineering Tokyo University Of Agriculture And Technology

• SAKAGUCHI Tomofumi

  Graduate School of Engineering, Tokyo University of Agriculture and Technology

• KAMIYA Yukihiro

  Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

• SUZUKI Yasuo

  Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

• Fujii Takeo

  The University Of Electromagnetic Communication

• Fujii Takeo

  Univ. Electro‐communications Chofu‐shi Jpn

• Suzuki Yasuo

  Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture

• Sakaguchi Tomofumi

  Graduate School Of Engineering Tokyo University Of Agriculture And Technology

• Fujii Takeo

  Advanced Wireless Communication Research Center (awcc) The University Of Electro-communications

• Suzuki Yasuo

  Institute Of Plama Physics Nagoya University

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