ISSN 0253-2778

CN 34-1054/N

open
Open AccessOpen Access JUSTC

Adaptive subcarrier allocation for multiuser MIMO-OFDM systems based on imperfect feedback

Cite this: JUSTC, 2010, 40(4): 412-418
https://doi.org/10.3969/j.issn.0253-2778.2010.04.014
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  • Received Date: April 29, 2008
  • Revised Date: October 05, 2008
  • Published Date: April 29, 2010
  • An adaptive subcarrier allocation algorithm based on imperfect feedback was proposed for multiuser MIMO-OFDM systems with VBLAST architecture. Not only the feedback channel information, but also the feedback quality were considered in the algorithm. The definitions of confidence coefficient and equivalent variance were introduced to indicate the feedback quality, and the closed expressions were deduced in actual environments considering both feedback delay and feedback error. Simulation results show that the proposed algorithm can improve system performance in various imperfect feedback scenarios.

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