On Allocation Strategies for Dynamic MIMO-OFDMA with Multi-User Beamforming

Authors: M. Petermann, C. Bockelmann, K.-D. Kammeyer
Abstract: This paper considers the impact of different user allocation metrics and strategies on Orthogonal Frequency Division Multiple Access schemes with multi-user beamforming and receive diversity. Here, only a selected subset of all existing users is scheduled on each subcarrier. Thus, if the number of transmit antennas is less than the number of users, user selection is required. Employing strong forward error correcting codes signi´Čücantly improves the performance of the systems. However, intending to maximize the sum-rate of the system does not automatically yield the best performance in terms of error rates. We analyse the difference of user allocation strategies for uncoded and coded cases with linear beamforming methods and illustrate the performances in terms of perfect and imperfect channel state information.
Document type: Conference Paper
Publication: Hamburg, Germany, 29. - 30. August 2007
Conference: 12th International OFDM-Workshop 2007 (InOWo 07)
Index: 287
InOWo_2007_petermann.pdf157 KBInOWo_2007_petermann.ps360 KB
Last change on 29.04.2008 by P. Kemkes
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