The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Cet article propose un répéteur radio, Cell Enhancer (CE), qui cible les systèmes d'accès sans fil à large bande de 5 GHz pour améliorer la probabilité de couverture sans qu'il soit nécessaire d'établir un nouveau point d'accès (AP). Le CE adopte un schéma de répétition non régénératif pour transférer les signaux et met en œuvre deux nouvelles approches, le contrôle de synchronisation et le contrôle de gain, à appliquer aux systèmes cibles. En surveillant les signaux de commande diffusés par l'AP, le CE se comporte comme un AP utilisant la même synchronisation de trame et le même niveau de puissance d'émission, mais en utilisant un deuxième canal de fréquence. Ainsi, le CE peut étendre la zone de couverture d'un point d'accès. Il apparaît cependant que, dans le système de multiplexage par répartition orthogonale de la fréquence (OFDM), sur deux sauts avec répétition non régénérative, l'effet additif de l'évanouissement par trajets multiples des deux trajets entraîne des fluctuations de sous-porteuses plus violentes et un étalement de retard accru. Les simulations informatiques dans des environnements d'évanouissement par trajets multiples dérivent les valeurs CNR requises pour chaque trajet, qui sont requises lorsque le CE est installé sur le terrain. De plus, nous clarifions que plusieurs CE peuvent utiliser la même seconde fréquence et offrir une meilleure couverture avec un gain de macro-diversité utile dans les environnements intérieurs de 5 GHz.
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Shuta UWANO, "Cell Enhancer for Broadband Wireless Access Systems" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 5, pp. 908-918, May 2002, doi: .
Abstract: This paper proposes a radio repeater, cell enhancer (CE), that targets 5-GHz broadband wireless access systems to improve the coverage probability without the need to establish a new access point (AP). The CE adopts a non-regenerative repeating scheme to transfer signals and implements two novel approaches, timing control and gain control, to apply to the target systems. By monitoring the control signals broadcast from the AP, the CE behaves as an AP using the same frame timing and transmitting power level, but using a second frequency channel. Thus, the CE can extend the coverage area of one AP. It appears that, however, in the orthogonal frequency division multiplexing (OFDM) system, over two hops with non-regenerative repeating, the additive effect of multipath fading from the two paths results in more violent subcarrier fluctuations and increased delay spread. Computer simulations in multipath fading environments derive the required CNR values for each path, which are required when the CE is installed in the field. In addition, we clarify that multiple CEs can use the same second frequency and provide better coverage with useful macro diversity gain in 5-GHz indoor environments.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_5_908/_p
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@ARTICLE{e85-b_5_908,
author={Shuta UWANO, },
journal={IEICE TRANSACTIONS on Communications},
title={Cell Enhancer for Broadband Wireless Access Systems},
year={2002},
volume={E85-B},
number={5},
pages={908-918},
abstract={This paper proposes a radio repeater, cell enhancer (CE), that targets 5-GHz broadband wireless access systems to improve the coverage probability without the need to establish a new access point (AP). The CE adopts a non-regenerative repeating scheme to transfer signals and implements two novel approaches, timing control and gain control, to apply to the target systems. By monitoring the control signals broadcast from the AP, the CE behaves as an AP using the same frame timing and transmitting power level, but using a second frequency channel. Thus, the CE can extend the coverage area of one AP. It appears that, however, in the orthogonal frequency division multiplexing (OFDM) system, over two hops with non-regenerative repeating, the additive effect of multipath fading from the two paths results in more violent subcarrier fluctuations and increased delay spread. Computer simulations in multipath fading environments derive the required CNR values for each path, which are required when the CE is installed in the field. In addition, we clarify that multiple CEs can use the same second frequency and provide better coverage with useful macro diversity gain in 5-GHz indoor environments.},
keywords={},
doi={},
ISSN={},
month={May},}
Copier
TY - JOUR
TI - Cell Enhancer for Broadband Wireless Access Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 908
EP - 918
AU - Shuta UWANO
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2002
AB - This paper proposes a radio repeater, cell enhancer (CE), that targets 5-GHz broadband wireless access systems to improve the coverage probability without the need to establish a new access point (AP). The CE adopts a non-regenerative repeating scheme to transfer signals and implements two novel approaches, timing control and gain control, to apply to the target systems. By monitoring the control signals broadcast from the AP, the CE behaves as an AP using the same frame timing and transmitting power level, but using a second frequency channel. Thus, the CE can extend the coverage area of one AP. It appears that, however, in the orthogonal frequency division multiplexing (OFDM) system, over two hops with non-regenerative repeating, the additive effect of multipath fading from the two paths results in more violent subcarrier fluctuations and increased delay spread. Computer simulations in multipath fading environments derive the required CNR values for each path, which are required when the CE is installed in the field. In addition, we clarify that multiple CEs can use the same second frequency and provide better coverage with useful macro diversity gain in 5-GHz indoor environments.
ER -