A New Approach to Joint AMC and Power Allocation for MIMO-OFDM

  • Authors:

  • Jordi Diaz;Yeheskel Bar-Ness;Ye Hoon Lee

  • Affiliations:

  • New Jersey Institute of Technology;New Jersey Institute of Technology;Samsung Advanced Institute of Technology, Suwon, Korea

  • Venue:
  • AICT-ICIW '06 Proceedings of the Advanced Int'l Conference on Telecommunications and Int'l Conference on Internet and Web Applications and Services
  • Year:
  • 2006

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Abstract

In this paper we propose a new approach for the design of adaptive modulation and coding (AMC) for MIMOOFDM wireless communications. We justify a possible conflict on the joint extraction of diversity and adaptation benefits of a MIMO-OFDM channel known at the transmitter. The proposed scheme avoids this conflict by adapting as accurately as possible given the side information while using diversity to combat remaining uncertainty. This is accomplished by channel parallelization, sorting and grouping into modulation modes. A new power allocation strategy, named WF/CI, is also introduced and showed to perform better than conventional water-filling in a practical setting.