Journal Articles
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Ruyet, Le D; Özbek, B Resource management techniques for OFDMA Journal Article Orthogonal Frequency Division Multiple Access Fundamentals and Applications …, 2010. BibTeX @article{pop00020d,
title = {Resource management techniques for OFDMA},
author = {Le D Ruyet and B Özbek},
year = {2010},
date = {2010-01-01},
journal = {Orthogonal Frequency Division Multiple Access Fundamentals and Applications …},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Özbek, B; Ruyet, Le D; Khanfir, H Performance evaluation of multicast MISO–OFDM systems Journal Article annals of telecommunications-annales des télécommunications 63 (5-6), pp. 295–305, 2008. BibTeX @article{pop00012bbb,
title = {Performance evaluation of multicast MISO–OFDM systems},
author = {B Özbek and Le D Ruyet and H Khanfir},
year = {2008},
date = {2008-01-01},
journal = {annals of telecommunications-annales des télécommunications 63 (5-6)},
pages = {295--305},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ruyet, Le D; Özbek, B; Khiari, H Performance of multicast MISO–OFDM systems Journal Article Proc of 13th European wireless conference, Paris, 2007. BibTeX @article{pop00071,
title = {Performance of multicast MISO–OFDM systems},
author = {Le D Ruyet and B Özbek and H Khiari},
year = {2007},
date = {2007-01-01},
journal = {Proc of 13th European wireless conference, Paris},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ruyet, Le D; Ozbek, B; Khanfir, H Etude des performances des systemes de communication MISO avec voie de retour Journal Article 21° Colloque GRETSI, Troyes, FRA, 11-14 septembre, 2007 , 2007. BibTeX @article{pop00098,
title = {Etude des performances des systemes de communication MISO avec voie de retour},
author = {Le D Ruyet and B Ozbek and H Khanfir},
year = {2007},
date = {2007-01-01},
journal = {21° Colloque GRETSI, Troyes, FRA, 11-14 septembre},
volume = {2007},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ozbek, B; Ruyet, Le D Low complexity ZF receiver for orthogonal SFBC-OFDM in broadband wireless channels Journal Article Electronics Letters, 42 (8), pp. 479–481, 2006. BibTeX @article{pop00022d,
title = {Low complexity ZF receiver for orthogonal SFBC-OFDM in broadband wireless channels},
author = {B Ozbek and Le D Ruyet},
year = {2006},
date = {2006-01-01},
journal = {Electronics Letters},
volume = {42},
number = {8},
pages = {479--481},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ozbek, Berna; Ruyet, Le D Pilot-symbol-aided iterative channel estimation for OFDM-based systems Journal Article Electronics and Communications, 2005, ISBN: 1604238216. Abstract | BibTeX @article{Ozbek2005,
title = {Pilot-symbol-aided iterative channel estimation for OFDM-based systems},
author = {Berna Ozbek and Le D Ruyet},
isbn = {1604238216},
year = {2005},
date = {2005-01-01},
journal = {Electronics and Communications},
abstract = {In this paper, we propose a pilot-symbol-aided iterative chan- nel estimation for coded OFDM-based systems. We use the symbol APP provided by the channel decoder to form groups of virtual pilots. According to their reliabilities, we com- bine these groups to improve the channel estimation. We also compare},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, we propose a pilot-symbol-aided iterative chan- nel estimation for coded OFDM-based systems. We use the symbol APP provided by the channel decoder to form groups of virtual pilots. According to their reliabilities, we com- bine these groups to improve the channel estimation. We also compare |
Özbek, Berna; Yilmaz, Reyat The adaptive channel estimation for STBC-OFDM systems Journal Article Istanbul University - Journal of Electrical and Electronics Engineering, 2005, ISSN: 13030914. BibTeX @article{Ozbek2005a,
title = {The adaptive channel estimation for STBC-OFDM systems},
author = {Berna Özbek and Reyat Yilmaz},
issn = {13030914},
year = {2005},
date = {2005-01-01},
journal = {Istanbul University - Journal of Electrical and Electronics Engineering},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ruyet, Le D; Ozbek, B Systèmes MIMO et codage spatio-temporel Journal Article Revue de l’électricité et de l’électronique,, (4), 2005. BibTeX @article{pop00015cb,
title = {Systèmes MIMO et codage spatio-temporel},
author = {Le D Ruyet and B Ozbek},
year = {2005},
date = {2005-01-01},
journal = {Revue de l’électricité et de l’électronique,},
number = {4},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ozbek, B; Ruyet, Le D Performance and complexity analysis of suboptimal MIMO detectors Journal Article Vehicular technology conference, 2005. VTC 2005-Spring. 2005 IEEE 61st 2 …, 2005. BibTeX @article{pop00049bb,
title = {Performance and complexity analysis of suboptimal MIMO detectors},
author = {B Ozbek and Le D Ruyet},
year = {2005},
date = {2005-01-01},
journal = {Vehicular technology conference, 2005. VTC 2005-Spring. 2005 IEEE 61st 2 …},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ruyet, Le D; Bertozzi, T; Ozbek, B Breadth first algorithms for APP detectors over MIMO channels Journal Article Communications, 2004 IEEE International Conference on, 2 , pp. 926–930, 2004. BibTeX @article{pop00001bbb,
title = {Breadth first algorithms for APP detectors over MIMO channels},
author = {Le D Ruyet and T Bertozzi and B Ozbek},
year = {2004},
date = {2004-01-01},
journal = {Communications, 2004 IEEE International Conference on},
volume = {2},
pages = {926--930},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Ozbek, B; Ruyet, Le D Performance analysis of coded SFBC-OFDM systems with four transmit antennas Journal Article 9th International OFDM-Workshop, Sept., 2004 , 2004. BibTeX @article{pop00072,
title = {Performance analysis of coded SFBC-OFDM systems with four transmit antennas},
author = {B Ozbek and Le D Ruyet},
year = {2004},
date = {2004-01-01},
journal = {9th International OFDM-Workshop, Sept.},
volume = {2004},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Özbek, B; Ruyet, Le D; Bellanger, M On space-frequency block codes for unequal channels Journal Article Proc. 2nd COST 273 Workshop Broadband Wireless Local Access, 2003. BibTeX @article{pop00014b,
title = {On space-frequency block codes for unequal channels},
author = {B Özbek and Le D Ruyet and M Bellanger},
year = {2003},
date = {2003-01-01},
journal = {Proc. 2nd COST 273 Workshop Broadband Wireless Local Access},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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OZBEK, B; Ruyet, Le D; Bellanger, M Non-orthogonal space-time block coding design for 3 transmit antennas Journal Article 19° Colloque sur le traitement du signal et des images, FRA, 2003 , 2003. BibTeX @article{pop00099,
title = {Non-orthogonal space-time block coding design for 3 transmit antennas},
author = {B OZBEK and Le D Ruyet and M Bellanger},
year = {2003},
date = {2003-01-01},
journal = {19° Colloque sur le traitement du signal et des images, FRA},
volume = {2003},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Inproceedings
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Özbek, Berna; Ruyet, Didier Le Adaptive limited feedback for intercell interference cancelation in cooperative downlink multicell networks Inproceedings Proceedings of the 2010 7th International Symposium on Wireless Communication Systems, ISWCS'10, 2010, ISBN: 9781424463169. Links | BibTeX @inproceedings{Ozbek2010a,
title = {Adaptive limited feedback for intercell interference cancelation in cooperative downlink multicell networks},
author = {Berna Özbek and Didier Le Ruyet},
doi = {10.1109/ISWCS.2010.5624536},
isbn = {9781424463169},
year = {2010},
date = {2010-01-01},
booktitle = {Proceedings of the 2010 7th International Symposium on Wireless Communication Systems, ISWCS'10},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Basturk, Ilhan; Ozbek, Berna Performance of EM-based channel estimation for STBC-OFDM systems Inproceedings 2009. Links | BibTeX @inproceedings{Basturk2009a,
title = {Performance of EM-based channel estimation for STBC-OFDM systems},
author = {Ilhan Basturk and Berna Ozbek},
doi = {10.1109/siu.2009.5136338},
year = {2009},
date = {2009-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Ozbek, Berna; Ruyet, Didier Le Transmit beamforming techniques for multicast wireless communication systems Inproceedings 2009. Links | BibTeX @inproceedings{Ozbek2009b,
title = {Transmit beamforming techniques for multicast wireless communication systems},
author = {Berna Ozbek and Didier Le Ruyet},
doi = {10.1109/siu.2009.5136377},
year = {2009},
date = {2009-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Özbek, Berna; Ruyet, Didier Le Reduced feedback designs for SDMA-OFDMA systems Inproceedings IEEE International Conference on Communications, 2009, ISSN: 05361486. Links | BibTeX @inproceedings{Ozbek2009abbb,
title = {Reduced feedback designs for SDMA-OFDMA systems},
author = {Berna Özbek and Didier Le Ruyet},
doi = {10.1109/ICC.2009.5199400},
issn = {05361486},
year = {2009},
date = {2009-01-01},
booktitle = {IEEE International Conference on Communications},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Ustok, Refik Fatih; Ozbek, Berna Spectrum sensing based on energy detection for Cognitive Radio systems with multiple antennas Inproceedings 2009. Links | BibTeX @inproceedings{Ustok2009,
title = {Spectrum sensing based on energy detection for Cognitive Radio systems with multiple antennas},
author = {Refik Fatih Ustok and Berna Ozbek},
doi = {10.1109/siu.2009.5136416},
year = {2009},
date = {2009-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Özbek, Berna; Ruyet, Didier Le Adaptive resource allocation for SDMA-OFDMA systems with genetic algorithm Inproceedings Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09, 2009, ISBN: 9781424435845. Links | BibTeX @inproceedings{Ozbek2009c,
title = {Adaptive resource allocation for SDMA-OFDMA systems with genetic algorithm},
author = {Berna Özbek and Didier Le Ruyet},
doi = {10.1109/ISWCS.2009.5285288},
isbn = {9781424435845},
year = {2009},
date = {2009-01-01},
booktitle = {Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Baştürk, Ilhan; ÖZbek, Berna Iterative EM-based channel estimation for STBC-OFDM Inproceedings IEEE Wireless Communications and Networking Conference, WCNC, 2009, ISSN: 15253511. Links | BibTeX @inproceedings{Basturk2009b,
title = {Iterative EM-based channel estimation for STBC-OFDM},
author = {Ilhan Baştürk and Berna ÖZbek},
doi = {10.1109/WCNC.2009.4917765},
issn = {15253511},
year = {2009},
date = {2009-01-01},
booktitle = {IEEE Wireless Communications and Networking Conference, WCNC},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Ruyet, Didier Le; Khanfir, Hajer; Özbek, Berna Performance of semi-orthogonal user selection for multiuser MISO systems Inproceedings IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2008. Abstract | Links | BibTeX @inproceedings{LeRuyet2008,
title = {Performance of semi-orthogonal user selection for multiuser MISO systems},
author = {Didier Le Ruyet and Hajer Khanfir and Berna Özbek},
doi = {10.1109/SPAWC.2008.4641622},
year = {2008},
date = {2008-01-01},
booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC},
abstract = {For MISO multiuser downlink wireless communication system with$backslash$nprecoding at the transmission, the channel state information at$backslash$nthe transmitter can provide tremendous capacity gains. However,$backslash$nthe amount of feedback data increases with the number of users in$backslash$nthe cell and the number of transmit antennas. In this paper, we$backslash$nstudy the performance of different user selection algorithms at$backslash$nthe receiver side through the noisy uplink channel. We evaluate$backslash$nthe effect of the noisy channel on the classical norm criterion$backslash$nwith a criterion based on the orthogonality between the user$backslash$nchannels. Without cooperation between the users, we only allow$backslash$nusers that are semi-orthogonal to feedback their channel$backslash$ninformation as analog and quantized information to the base$backslash$nstation through the noisy uplink channel. We propose an algorithm$backslash$nto reduce the noise effect on the analog feedback for$backslash$nsemi-orthogonal user selection algorithm. We show that the$backslash$nsemi-orthogonal criterion with quantized feedback gives a better$backslash$nperformance compared to the norm criterion for perfect and noisy$backslash$nuplink channels.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
For MISO multiuser downlink wireless communication system with$backslash$nprecoding at the transmission, the channel state information at$backslash$nthe transmitter can provide tremendous capacity gains. However,$backslash$nthe amount of feedback data increases with the number of users in$backslash$nthe cell and the number of transmit antennas. In this paper, we$backslash$nstudy the performance of different user selection algorithms at$backslash$nthe receiver side through the noisy uplink channel. We evaluate$backslash$nthe effect of the noisy channel on the classical norm criterion$backslash$nwith a criterion based on the orthogonality between the user$backslash$nchannels. Without cooperation between the users, we only allow$backslash$nusers that are semi-orthogonal to feedback their channel$backslash$ninformation as analog and quantized information to the base$backslash$nstation through the noisy uplink channel. We propose an algorithm$backslash$nto reduce the noise effect on the analog feedback for$backslash$nsemi-orthogonal user selection algorithm. We show that the$backslash$nsemi-orthogonal criterion with quantized feedback gives a better$backslash$nperformance compared to the norm criterion for perfect and noisy$backslash$nuplink channels. |
Ozbek, Berna; Ruyet, Didier Le Sum-rate maximized adaptive subcarrier and bit allocation for multiuser OFDM systems with genetic algorithm Inproceedings 2008. Links | BibTeX @inproceedings{Ozbek2008a,
title = {Sum-rate maximized adaptive subcarrier and bit allocation for multiuser OFDM systems with genetic algorithm},
author = {Berna Ozbek and Didier Le Ruyet},
doi = {10.1109/siu.2008.4632674},
year = {2008},
date = {2008-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Khanfir, Hajer; Ruyet, Didier Le; Özbek, Berna Semi-orthogonal user selection for MISO systems with quantized feedback Inproceedings 2008 International ITG Workshop on Smart Antennas, WSA 2008, 2008, ISBN: 9781424417575. Abstract | Links | BibTeX @inproceedings{Khanfir2008,
title = {Semi-orthogonal user selection for MISO systems with quantized feedback},
author = {Hajer Khanfir and Didier Le Ruyet and Berna Özbek},
doi = {10.1109/WSA.2008.4475554},
isbn = {9781424417575},
year = {2008},
date = {2008-01-01},
booktitle = {2008 International ITG Workshop on Smart Antennas, WSA 2008},
abstract = {For MISO multi-users downlink wireless communication system with$backslash$nprecoding at the transmission, the channel state of information at$backslash$nthe transmitter can provide tremendous capacity gains. However, the$backslash$namount of feedback data increase with the users number in the cell$backslash$nand the number of transmit antennas. In this paper, we study$backslash$ndifferent algorithms and criteria in order to significantly$backslash$nreduced the amount of feedback data. We associate the classical norm$backslash$ncriterion with a criterion based on the orthogonality between the user$backslash$nchannels. Without$backslash$ncooperation between the users, we only allow users that are$backslash$northogonal to feedback their channel information (CQI and CDI) to$backslash$nthe base station. The feedbacked CDI is quantized using a local$backslash$ngrassmanian packing . We show that the proposed combined$backslash$ncriterion with a finite feedback rate gives better performance compared$backslash$nto the norm criterion.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
For MISO multi-users downlink wireless communication system with$backslash$nprecoding at the transmission, the channel state of information at$backslash$nthe transmitter can provide tremendous capacity gains. However, the$backslash$namount of feedback data increase with the users number in the cell$backslash$nand the number of transmit antennas. In this paper, we study$backslash$ndifferent algorithms and criteria in order to significantly$backslash$nreduced the amount of feedback data. We associate the classical norm$backslash$ncriterion with a criterion based on the orthogonality between the user$backslash$nchannels. Without$backslash$ncooperation between the users, we only allow users that are$backslash$northogonal to feedback their channel information (CQI and CDI) to$backslash$nthe base station. The feedbacked CDI is quantized using a local$backslash$ngrassmanian packing . We show that the proposed combined$backslash$ncriterion with a finite feedback rate gives better performance compared$backslash$nto the norm criterion. |
Basturk, Ilhan; Ozbek, Berna Pilot-based iterative channel estimation for OFDM systems Inproceedings 2008. Links | BibTeX @inproceedings{Basturk2008,
title = {Pilot-based iterative channel estimation for OFDM systems},
author = {Ilhan Basturk and Berna Ozbek},
doi = {10.1109/siu.2008.4632584},
year = {2008},
date = {2008-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Ruyet, Didier Le; Özbek, Berna Partial and analog feedback for MISO precoding systems Inproceedings IEEE International Conference on Communications, 2007, ISSN: 05361486. Links | BibTeX @inproceedings{LeRuyet2007,
title = {Partial and analog feedback for MISO precoding systems},
author = {Didier Le Ruyet and Berna Özbek},
doi = {10.1109/ICC.2007.460},
issn = {05361486},
year = {2007},
date = {2007-01-01},
booktitle = {IEEE International Conference on Communications},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Basturk, Ilhan; Ozbek, Berna Performance of Pilot-Based EM Channel Estimation for OFDM Systems Inproceedings 2007. Links | BibTeX @inproceedings{Basturk2007,
title = {Performance of Pilot-Based EM Channel Estimation for OFDM Systems},
author = {Ilhan Basturk and Berna Ozbek},
doi = {10.1109/siu.2007.4298631},
year = {2007},
date = {2007-01-01},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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Özbek, Berna; Ruyet, Didier Le; Khiari, Hajer Adaptive resource allocation for multicast OFDM systems with multiple transmit antennas Inproceedings IEEE International Conference on Communications, 2006, ISSN: 05361486. Links | BibTeX @inproceedings{Ozbek2006,
title = {Adaptive resource allocation for multicast OFDM systems with multiple transmit antennas},
author = {Berna Özbek and Didier Le Ruyet and Hajer Khiari},
doi = {10.1109/ICC.2006.255332},
issn = {05361486},
year = {2006},
date = {2006-01-01},
booktitle = {IEEE International Conference on Communications},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
