Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas

Tomofumi SAKAGUCHI; Yukihiro KAMIYA; Takeo FUJII; Yasuo SUZUKI

doi:10.1093/ietcom/e91-b.9.2940

Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas

Tomofumi SAKAGUCHI, Yukihiro KAMIYA, Takeo FUJII, Yasuo SUZUKI

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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 AAA's 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.

Publication: IEICE TRANSACTIONS on Communications Vol.E91-B No.9 pp.2940-2947

Publication Date: 2008/09/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e91-b.9.2940

Type of Manuscript: PAPER

Category: Terrestrial Radio Communications

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Tomofumi SAKAGUCHI, Yukihiro KAMIYA, Takeo FUJII, Yasuo SUZUKI, "Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas" in IEICE TRANSACTIONS on Communications, vol. E91-B, no. 9, pp. 2940-2947, September 2008, doi: 10.1093/ietcom/e91-b.9.2940.
Abstract: 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 AAA's 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.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.9.2940/_p

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@ARTICLE{e91-b_9_2940,
author={Tomofumi SAKAGUCHI, Yukihiro KAMIYA, Takeo FUJII, Yasuo SUZUKI, },
journal={IEICE TRANSACTIONS on Communications},
title={Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas},
year={2008},
volume={E91-B},
number={9},
pages={2940-2947},
abstract={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 AAA's 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.},
keywords={},
doi={10.1093/ietcom/e91-b.9.2940},
ISSN={1745-1345},
month={September},}

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TY - JOUR
TI - Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas
T2 - IEICE TRANSACTIONS on Communications
SP - 2940
EP - 2947
AU - Tomofumi SAKAGUCHI
AU - Yukihiro KAMIYA
AU - Takeo FUJII
AU - Yasuo SUZUKI
PY - 2008
DO - 10.1093/ietcom/e91-b.9.2940
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2008
AB - 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 AAA's 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.
ER -