Downlink transmission in multi-carrier systems with reduced feedback

Yuanye Wang, Klaus Pedersen, Troels Bundgaard Sørensen, Preben Mogensen

Research output: Contribution to journalConference article in JournalResearchpeer-review

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Abstract

in this paper we address the problem of reducing the feedback for the downlink transmission in multi-carrier systems. In these systems multiple Component Carriers (CCs) are aggregated together to form a wide spectrum. Consequently, a large feedback overhead is required to report the channel quality information over such a wide bandwidth. We first generalize two existing feedback reduction techniques, and then propose a new one. These techniques use different feedback schemes across the CCs, or allow some CCs to be un-reported, for the purpose of reducing the amount of feedback. Performance for the investigated techniques is evaluated in a realistic system setting with different traffic conditions and terminal categories. Based on the obtained results, the selection of proper feedback reduction technique under different load conditions can be made. The findings are useful for reducing the feedback overhead in future generation wireless communication systems that operate over multiple CCs.
Original languageEnglish
JournalI E E E V T S Vehicular Technology Conference. Proceedings
Pages (from-to)1-5
Number of pages5
ISSN1550-2252
DOIs
Publication statusPublished - May 2010
EventIEEE Vehicular Technology Conference - Taipei, Taiwan, Province of China
Duration: 16 May 201019 May 2010
Conference number: 71

Conference

ConferenceIEEE Vehicular Technology Conference
Number71
CountryTaiwan, Province of China
CityTaipei
Period16/05/201019/05/2010

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Multicarrier
Feedback
Information Quality
Wireless Communication
Communication Systems
Communication systems
Bandwidth
Traffic
Generalise

Cite this

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title = "Downlink transmission in multi-carrier systems with reduced feedback",
abstract = "in this paper we address the problem of reducing the feedback for the downlink transmission in multi-carrier systems. In these systems multiple Component Carriers (CCs) are aggregated together to form a wide spectrum. Consequently, a large feedback overhead is required to report the channel quality information over such a wide bandwidth. We first generalize two existing feedback reduction techniques, and then propose a new one. These techniques use different feedback schemes across the CCs, or allow some CCs to be un-reported, for the purpose of reducing the amount of feedback. Performance for the investigated techniques is evaluated in a realistic system setting with different traffic conditions and terminal categories. Based on the obtained results, the selection of proper feedback reduction technique under different load conditions can be made. The findings are useful for reducing the feedback overhead in future generation wireless communication systems that operate over multiple CCs.",
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year = "2010",
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doi = "10.1109/VETECS.2010.5493844",
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Downlink transmission in multi-carrier systems with reduced feedback. / Wang, Yuanye; Pedersen, Klaus; Sørensen, Troels Bundgaard; Mogensen, Preben.

In: I E E E V T S Vehicular Technology Conference. Proceedings, 05.2010, p. 1-5.

Research output: Contribution to journalConference article in JournalResearchpeer-review

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N2 - in this paper we address the problem of reducing the feedback for the downlink transmission in multi-carrier systems. In these systems multiple Component Carriers (CCs) are aggregated together to form a wide spectrum. Consequently, a large feedback overhead is required to report the channel quality information over such a wide bandwidth. We first generalize two existing feedback reduction techniques, and then propose a new one. These techniques use different feedback schemes across the CCs, or allow some CCs to be un-reported, for the purpose of reducing the amount of feedback. Performance for the investigated techniques is evaluated in a realistic system setting with different traffic conditions and terminal categories. Based on the obtained results, the selection of proper feedback reduction technique under different load conditions can be made. The findings are useful for reducing the feedback overhead in future generation wireless communication systems that operate over multiple CCs.

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