Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Kenta OKINO; Chiharu YAMAZAKI; Masanori KATO; Fangwei TONG; Tohru SUNAGA; Shigeru KIMURA

doi:10.1093/ietcom/e90-b.9.2330

Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Kenta OKINO, Chiharu YAMAZAKI, Masanori KATO, Fangwei TONG, Tohru SUNAGA, Shigeru KIMURA

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In a time division duplex (TDD) based adaptive antenna array (AAA) and space division multiple access (SDMA) systems, array weights determined from the up-link signals can be applied to the down-link signal transmission because of the channel reciprocity. However, under time-varying fading conditions, for example that created by a rapidly moving mobile station (MS), the channel change between the array weight determination time in the up-link and the down-link signal transmission degrades the accuracy of the array weight. Thus, the spectral efficiency of the system degrades in the down-link. In this paper, we introduce a prototype of an MS with a 2-element antenna array and present the down-link mobility performance results of computer simulations and field experiments in a field trial system of i-Burst, which is a TDD based wireless broadband system employing the AAA/SDMA techniques at the base station. Both results show that adaptive antenna processing at an MS is effective in improving the down-link mobility performance of TDD-AAA/SDMA systems.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.9 pp.2330-2337

Publication Date: 2007/09/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.9.2330

Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)

Category: Smart Antennas

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Kenta OKINO, Chiharu YAMAZAKI, Masanori KATO, Fangwei TONG, Tohru SUNAGA, Shigeru KIMURA, "Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 9, pp. 2330-2337, September 2007, doi: 10.1093/ietcom/e90-b.9.2330.
Abstract: In a time division duplex (TDD) based adaptive antenna array (AAA) and space division multiple access (SDMA) systems, array weights determined from the up-link signals can be applied to the down-link signal transmission because of the channel reciprocity. However, under time-varying fading conditions, for example that created by a rapidly moving mobile station (MS), the channel change between the array weight determination time in the up-link and the down-link signal transmission degrades the accuracy of the array weight. Thus, the spectral efficiency of the system degrades in the down-link. In this paper, we introduce a prototype of an MS with a 2-element antenna array and present the down-link mobility performance results of computer simulations and field experiments in a field trial system of i-Burst, which is a TDD based wireless broadband system employing the AAA/SDMA techniques at the base station. Both results show that adaptive antenna processing at an MS is effective in improving the down-link mobility performance of TDD-AAA/SDMA systems.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.9.2330/_p

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@ARTICLE{e90-b_9_2330,
author={Kenta OKINO, Chiharu YAMAZAKI, Masanori KATO, Fangwei TONG, Tohru SUNAGA, Shigeru KIMURA, },
journal={IEICE TRANSACTIONS on Communications},
title={Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment},
year={2007},
volume={E90-B},
number={9},
pages={2330-2337},
abstract={In a time division duplex (TDD) based adaptive antenna array (AAA) and space division multiple access (SDMA) systems, array weights determined from the up-link signals can be applied to the down-link signal transmission because of the channel reciprocity. However, under time-varying fading conditions, for example that created by a rapidly moving mobile station (MS), the channel change between the array weight determination time in the up-link and the down-link signal transmission degrades the accuracy of the array weight. Thus, the spectral efficiency of the system degrades in the down-link. In this paper, we introduce a prototype of an MS with a 2-element antenna array and present the down-link mobility performance results of computer simulations and field experiments in a field trial system of i-Burst, which is a TDD based wireless broadband system employing the AAA/SDMA techniques at the base station. Both results show that adaptive antenna processing at an MS is effective in improving the down-link mobility performance of TDD-AAA/SDMA systems.},
keywords={},
doi={10.1093/ietcom/e90-b.9.2330},
ISSN={1745-1345},
month={September},}

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TY - JOUR
TI - Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 2330
EP - 2337
AU - Kenta OKINO
AU - Chiharu YAMAZAKI
AU - Masanori KATO
AU - Fangwei TONG
AU - Tohru SUNAGA
AU - Shigeru KIMURA
PY - 2007
DO - 10.1093/ietcom/e90-b.9.2330
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2007
AB - In a time division duplex (TDD) based adaptive antenna array (AAA) and space division multiple access (SDMA) systems, array weights determined from the up-link signals can be applied to the down-link signal transmission because of the channel reciprocity. However, under time-varying fading conditions, for example that created by a rapidly moving mobile station (MS), the channel change between the array weight determination time in the up-link and the down-link signal transmission degrades the accuracy of the array weight. Thus, the spectral efficiency of the system degrades in the down-link. In this paper, we introduce a prototype of an MS with a 2-element antenna array and present the down-link mobility performance results of computer simulations and field experiments in a field trial system of i-Burst, which is a TDD based wireless broadband system employing the AAA/SDMA techniques at the base station. Both results show that adaptive antenna processing at an MS is effective in improving the down-link mobility performance of TDD-AAA/SDMA systems.
ER -