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Adaptive Subcarrier Allocation with Imperfect Channel Knowledge versus Diversity Techniques in a Multi-User OFDM-System

Kühne, Alexander ; Klein, Anja (2007)
Adaptive Subcarrier Allocation with Imperfect Channel Knowledge versus Diversity Techniques in a Multi-User OFDM-System.
18th International Syposium on Personal, Indoor and Mobile Radio Communiations. Athens, Greece (03.-07.09.2007)
doi: 10.1109/PIMRC.2007.4394618
Conference or Workshop Item, Bibliographie

Abstract

In this paper, the performance of an adaptive multi-user OFDM system with imperfect channel knowledge at the transmitter is investigated, where the ergodic capacity is taken as performance criterion. This performance is then compared to the performance achievable with the use of diversity, where no channel knowledge at the transmitter is required. For that reason, different models of imperfect channel knowledge are introduced: noisy, outdated and quantised channel knowledge, where we provide an analytical derivation of the ergodic capacity for the combinations of the different models. By means of the ergodic capacity it is shown to which grade of channel knowledge imperfectness the use of adaptive subcarrier allocation with imperfect channel knowledge is still better than the use of diversity.

Item Type: Conference or Workshop Item
Erschienen: 2007
Creators: Kühne, Alexander ; Klein, Anja
Type of entry: Bibliographie
Title: Adaptive Subcarrier Allocation with Imperfect Channel Knowledge versus Diversity Techniques in a Multi-User OFDM-System
Language: English
Date: 4 December 2007
Publisher: IEEE
Book Title: pimrc'07
Event Title: 18th International Syposium on Personal, Indoor and Mobile Radio Communiations
Event Location: Athens, Greece
Event Dates: 03.-07.09.2007
DOI: 10.1109/PIMRC.2007.4394618
Abstract:

In this paper, the performance of an adaptive multi-user OFDM system with imperfect channel knowledge at the transmitter is investigated, where the ergodic capacity is taken as performance criterion. This performance is then compared to the performance achievable with the use of diversity, where no channel knowledge at the transmitter is required. For that reason, different models of imperfect channel knowledge are introduced: noisy, outdated and quantised channel knowledge, where we provide an analytical derivation of the ergodic capacity for the combinations of the different models. By means of the ergodic capacity it is shown to which grade of channel knowledge imperfectness the use of adaptive subcarrier allocation with imperfect channel knowledge is still better than the use of diversity.

Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications > Communications Engineering
Date Deposited: 12 Jul 2023 08:17
Last Modified: 12 Jul 2023 08:17
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