Proposal of Combined Multi-Level Modulation Methods on Wireless Access Networks and Its Application Effects

Hitomi TERAOKA; Masahiro NISHI; Teruaki YOSHIDA

Proposal of Combined Multi-Level Modulation Methods on Wireless Access Networks and Its Application Effects

Hitomi TERAOKA, Masahiro NISHI, Teruaki YOSHIDA

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In wireless access system, we need to use a limited frequency and electric power efficiently. And so we propose the fixed wireless access network using 5 GHz frequency which band has a good propagation performance in line of sight (LOS). In the proposed network, the several multi-level modulation methods are combined and identical frequency is reused by considering on the antenna directivity. As constructing this network, we can efficiently use frequency in 5 GHz band and enlarge system capacity. In this paper, it is assumed that user terminals are distributed nonuniformly over the service area. We analyze accommodation number of user terminals and the optimum combination of modulation methods. Numerical results show that most effective method is the combination of 16QAM and 256QAM, which can accommodate up to about 1.4 times as many users as only QPSK modulation method.

Publication: IEICE TRANSACTIONS on Communications Vol.E86-B No.2 pp.777-784

Publication Date: 2003/02/01

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Type of Manuscript: PAPER

Category: Terrestrial Radio Communications

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Hitomi TERAOKA, Masahiro NISHI, Teruaki YOSHIDA, "Proposal of Combined Multi-Level Modulation Methods on Wireless Access Networks and Its Application Effects" in IEICE TRANSACTIONS on Communications, vol. E86-B, no. 2, pp. 777-784, February 2003, doi: .
Abstract: In wireless access system, we need to use a limited frequency and electric power efficiently. And so we propose the fixed wireless access network using 5 GHz frequency which band has a good propagation performance in line of sight (LOS). In the proposed network, the several multi-level modulation methods are combined and identical frequency is reused by considering on the antenna directivity. As constructing this network, we can efficiently use frequency in 5 GHz band and enlarge system capacity. In this paper, it is assumed that user terminals are distributed nonuniformly over the service area. We analyze accommodation number of user terminals and the optimum combination of modulation methods. Numerical results show that most effective method is the combination of 16QAM and 256QAM, which can accommodate up to about 1.4 times as many users as only QPSK modulation method.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/e86-b_2_777/_p

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@ARTICLE{e86-b_2_777,
author={Hitomi TERAOKA, Masahiro NISHI, Teruaki YOSHIDA, },
journal={IEICE TRANSACTIONS on Communications},
title={Proposal of Combined Multi-Level Modulation Methods on Wireless Access Networks and Its Application Effects},
year={2003},
volume={E86-B},
number={2},
pages={777-784},
abstract={In wireless access system, we need to use a limited frequency and electric power efficiently. And so we propose the fixed wireless access network using 5 GHz frequency which band has a good propagation performance in line of sight (LOS). In the proposed network, the several multi-level modulation methods are combined and identical frequency is reused by considering on the antenna directivity. As constructing this network, we can efficiently use frequency in 5 GHz band and enlarge system capacity. In this paper, it is assumed that user terminals are distributed nonuniformly over the service area. We analyze accommodation number of user terminals and the optimum combination of modulation methods. Numerical results show that most effective method is the combination of 16QAM and 256QAM, which can accommodate up to about 1.4 times as many users as only QPSK modulation method.},
keywords={},
doi={},
ISSN={},
month={February},}

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TY - JOUR
TI - Proposal of Combined Multi-Level Modulation Methods on Wireless Access Networks and Its Application Effects
T2 - IEICE TRANSACTIONS on Communications
SP - 777
EP - 784
AU - Hitomi TERAOKA
AU - Masahiro NISHI
AU - Teruaki YOSHIDA
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E86-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2003
AB - In wireless access system, we need to use a limited frequency and electric power efficiently. And so we propose the fixed wireless access network using 5 GHz frequency which band has a good propagation performance in line of sight (LOS). In the proposed network, the several multi-level modulation methods are combined and identical frequency is reused by considering on the antenna directivity. As constructing this network, we can efficiently use frequency in 5 GHz band and enlarge system capacity. In this paper, it is assumed that user terminals are distributed nonuniformly over the service area. We analyze accommodation number of user terminals and the optimum combination of modulation methods. Numerical results show that most effective method is the combination of 16QAM and 256QAM, which can accommodate up to about 1.4 times as many users as only QPSK modulation method.
ER -