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".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dans cet article, les performances d'un schéma d'acquisition de code PN sont analysées et simulées pour un système de superposition DS/CDMA dans lequel un utilisateur CDMA et un utilisateur à bande étroite coexistent dans la même bande de fréquences. Un utilisateur à bande étroite est modélisé comme une interférence à bande étroite (NBI) située sur une fraction de la bande passante d'un utilisateur CDMA. Pour supprimer le NBI, un filtre de suppression d'interférences est utilisé au niveau de l'avant du récepteur. Les performances d'acquisition sont évaluées en termes de temps d'acquisition moyen à l'aide d'un diagramme de transition d'état pour le processus d'acquisition. Pour postuler à un environnement cellulaire mobile DS/CDMA, les interférences d'accès multiples et les imperfections du contrôle de puissance sont prises en compte dans l'analyse des performances d'acquisition. Le contrôle imparfait de la puissance est considéré en modélisant la puissance de chaque utilisateur comme étant distribuée de manière log-normale autour de la puissance nominale reçue. À partir des résultats de simulation, il est montré que dans les cas de contrôle de puissance parfait et imparfait, le filtre de suppression d'interférences est très efficace pour la suppression du NBI et l'acquisition rapide du code PN dans un environnement de superposition DS/CDMA. Il est également démontré que le nombre de prises unilatérales de 5 pour le filtre de suppression d'interférences est suffisant pour supprimer le NBI. De plus, les estimations de capacité sont comparées en fonction des performances d'acquisition et du BER. L'analyse présentée dans cet article peut être appliquée aux situations pratiques d'un environnement de superposition DS/CDMA.
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Jin Young KIM, "Narrowband Interference Suppression for PN Code Acquisition in a DS/CDMA Overlay Environment" in IEICE TRANSACTIONS on Communications,
vol. E83-B, no. 8, pp. 1631-1639, August 2000, doi: .
Abstract: In this paper, performance of a PN code acquisition scheme is analyzed and simulated for a DS/CDMA overlay system where a CDMA user and a narrowband user coexist in the same frequency band. A narrowband user is modelled as a narrowband interference (NBI) located at the fraction of a CDMA user's bandwidth. To suppress the NBI, an interference suppression filter is employed at the receiver frontend. Acquisition performance is evaluated in terms of mean acquisition time using state transition diagram for acquisition process. To apply for a DS/CDMA mobile cellular environments, multiple access interference and imperfection of power control are taken into account in the analysis of acquisition performance. The imperfect power control is considered by modelling the power of each user to be lognormally distributed about nominal received power. From the simulation results, it is shown that for the cases of perfect and imperfect power control, the interference suppression filter is very effective for supprssion of the NBI and rapid PN code acquisition in a DS/CDMA overlay environment. It is also shown that the one-sided tap number of 5 for interference suppression filter is sufficient to suppress the NBI. And, capacity estimates are compared based on acquisition and BER performance. The analysis in this paper can be applied to the practical situations for a DS/CDMA overlay environment.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e83-b_8_1631/_p
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@ARTICLE{e83-b_8_1631,
author={Jin Young KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Narrowband Interference Suppression for PN Code Acquisition in a DS/CDMA Overlay Environment},
year={2000},
volume={E83-B},
number={8},
pages={1631-1639},
abstract={In this paper, performance of a PN code acquisition scheme is analyzed and simulated for a DS/CDMA overlay system where a CDMA user and a narrowband user coexist in the same frequency band. A narrowband user is modelled as a narrowband interference (NBI) located at the fraction of a CDMA user's bandwidth. To suppress the NBI, an interference suppression filter is employed at the receiver frontend. Acquisition performance is evaluated in terms of mean acquisition time using state transition diagram for acquisition process. To apply for a DS/CDMA mobile cellular environments, multiple access interference and imperfection of power control are taken into account in the analysis of acquisition performance. The imperfect power control is considered by modelling the power of each user to be lognormally distributed about nominal received power. From the simulation results, it is shown that for the cases of perfect and imperfect power control, the interference suppression filter is very effective for supprssion of the NBI and rapid PN code acquisition in a DS/CDMA overlay environment. It is also shown that the one-sided tap number of 5 for interference suppression filter is sufficient to suppress the NBI. And, capacity estimates are compared based on acquisition and BER performance. The analysis in this paper can be applied to the practical situations for a DS/CDMA overlay environment.},
keywords={},
doi={},
ISSN={},
month={August},}
Copier
TY - JOUR
TI - Narrowband Interference Suppression for PN Code Acquisition in a DS/CDMA Overlay Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 1631
EP - 1639
AU - Jin Young KIM
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E83-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2000
AB - In this paper, performance of a PN code acquisition scheme is analyzed and simulated for a DS/CDMA overlay system where a CDMA user and a narrowband user coexist in the same frequency band. A narrowband user is modelled as a narrowband interference (NBI) located at the fraction of a CDMA user's bandwidth. To suppress the NBI, an interference suppression filter is employed at the receiver frontend. Acquisition performance is evaluated in terms of mean acquisition time using state transition diagram for acquisition process. To apply for a DS/CDMA mobile cellular environments, multiple access interference and imperfection of power control are taken into account in the analysis of acquisition performance. The imperfect power control is considered by modelling the power of each user to be lognormally distributed about nominal received power. From the simulation results, it is shown that for the cases of perfect and imperfect power control, the interference suppression filter is very effective for supprssion of the NBI and rapid PN code acquisition in a DS/CDMA overlay environment. It is also shown that the one-sided tap number of 5 for interference suppression filter is sufficient to suppress the NBI. And, capacity estimates are compared based on acquisition and BER performance. The analysis in this paper can be applied to the practical situations for a DS/CDMA overlay environment.
ER -